Re: Peterbilt 6x6 Medium Hauler
 

Tiny update...

Wanting this styrene work to be plenty stout I decided to take a couple minutes and build some plates and bonded them to the OEM plastic. This will give me a nice, flat surface(s) to attach the new hood sides and it will provide a lot more strength. I'll wait to get the fenders in before I bond the new hood sides. The reason being I want to make one side and trim it to fit the new fenders and then will use it to make a template so both sides are as symmetric as possible.
https://photos.smugmug.com/Hobby-Stu...MG_7383-XL.jpg

Passenger side cut and mocked up.
https://photos.smugmug.com/Hobby-Stu...MG_7384-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Got my Shapeways fenders in over the weekend and they look nice! The finish will require some sanding, but I'm pleased. I can't determine final positioning of the fenders until my wheels/tires arrive, but I've begun mocking things up a bit.

Installing the TLT axle and the Hi Lift front springs moved the axle forward a bit. Technically speaking, it seems most 6x6 trucks have the front axle set back quite a bit from a standard RWD truck. Mine won't be set back that far because I'd like a bit better approach angle. It'll still look pretty accurate so I'm good with it.

I'm having a hard time determining what model Pete this most resembles. And it doesn't help that most 6x6 trucks are so tall that they have sloped hoods and mine won't. So I may be building a truck that has never existed? Really not sure. So if anyone has input on if this truck most closely resembles a 357, 359, 389, etc. please let me know! :)

Anyway, here's some mock up pics. Nevermind the wheel/tire choice for now, but does the fender placement look about right?
https://photos.smugmug.com/Hobby-Stu...MG_7415-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7416-XL.jpg

If I keep this placement, I'll add some styrene down below so the fender isn't left unsupported.
https://photos.smugmug.com/Hobby-Stu...MG_7417-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Like you said wait until you have everything, If you were using what you have I'd say, based on the photos, you'd have to move the fenders back a bit so when you turn the tire doesn't get into the rear edge of the fender. Outside of that it looks good.

Re: Peterbilt 6x6 Medium Hauler
 

Well, the wait continues, unfortunately. I ordered my tires and front wheels from Stella on 1/20 and they shipped the same day. I chose Air Parcel over the cheapest shipping option in hopes I'd get it within a week or week and a half. I haven't seen an update since 1/23 and now have Stella looking into it. By the description I don't even know if it's left China or not. What a bummer! Anyway, moving on to other things....

So I got my 15mm spacers in from RC4WD. While I liked the new height of the transmission, they presented a problem. The transmission has a bulge by the shifter that is too wide to fit within the framerails. So I raised it a bit more (to 22mm) to get this bulge to reside inside the framerails better. Here's the spacers:
https://photos.smugmug.com/Hobby-Stu...MG_7465-XL.jpg

It's tough to see here, but if you look closely, the shifter area of the transmission is now inside the framerail and clears everything nicely.
https://photos.smugmug.com/Hobby-Stu...MG_7466-XL.jpg

Side view profile shot.
https://photos.smugmug.com/Hobby-Stu...MG_7462-XL.jpg

And even with the dash installed there's clearance between the motor and the body.
https://photos.smugmug.com/Hobby-Stu...MG_7461-XL.jpg

Looks like there will now be plenty of driveshaft clearance!
https://photos.smugmug.com/Hobby-Stu...MG_7463-XL.jpg

Next up is one of my least favorite things to do: bodywork. I picked up some Squadron White Putty and am beginning to clean up the sunroof and the top antenna emboss.
https://photos.smugmug.com/Hobby-Stu...MG_7464-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

If you are going to use air cleaners that have the exposed rubber hoses going through the side of the hood it would give the appearance of a 359
https://s-media-cache-ak0.pinimg.com...122cace58d.jpg

or possibly a 358 (basically a narrow hood ("needle-nose") version of the 359).http://images.fineartamerica.com/ima...ave-koontz.jpg

The 379, 357, 389 all have the air pipe from the air cleaners going directly into the side of the cowl.

How about changing the fenders and making a 353?

http://www.timstrucks.com/353SBFArightprofile.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Thanks for the info! I considered doing a body style like the 353, but I wanted a style more like the 359. I'm pretty sure a 6x6 359 never existed so my build won't be entirely realistic, but hopefully it'll still look nice.

It's funny you posted that first pic. I downloaded it as an example of a paint scheme I'm considering. It seems there's some common 2 tone paint schemes for these trucks. There's this one:
https://photos.smugmug.com/Hobby-Stu...D7A_tmp-XL.jpg

And there's this one (although this one is more customized):
https://photos.smugmug.com/Hobby-Stu...IMG_7445-L.jpg

And of course some trucks have a painted chassis and fuel tanks/steps like this one:
https://photos.smugmug.com/Hobby-Stu...3397BA_tmp.jpg

After doing a lot of research on color schemes and combinations, it looks like my truck will come out a lot like this, but with more purple:
https://photos.smugmug.com/Hobby-Stu...12714257-0.jpg

Found this one, too! Looks pretty cool and mine may come out somewhat similar in a lot of ways, but with 359 style fenders.
https://photos.smugmug.com/Hobby-Stu...d55c8dc8df.jpg

Re: Peterbilt 6x6 Medium Hauler
 

That's the neat part about building a class 8 type truck...every one of them is built to order so while some options may not be common does not mean that it was not available to everyone.

I wouldn't doubt that there are very few 359 6x6 out there but I am fairly confident they are out there.

Re: Peterbilt 6x6 Medium Hauler
 

That's good enough for me! Thank you! :)

Now if only my wheels/tires would show up. Until then I can't mount my fenders or set ride heights. But I may be done with the bodywork. Just need to place a coat of primer on it to see how it looks.

Re: Peterbilt 6x6 Medium Hauler
 

Finally got around to swapping out a bunch of hardware for socket head stuff. I really don't like Phillips head hardware! I need to order more of certain sizes and some shoulder screws don't have a replacement so they'll remain, but overall, it should be much easier to work on and look way better, IMO.
https://photos.smugmug.com/Hobby-Stu...MG_7481-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7482-XL.jpg

And the bodywork on the top of the cab is looking pretty good. I think I may be done after one more round of light sanding.
https://photos.smugmug.com/Hobby-Stu...MG_7483-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Trimmed the floorboard to accommodate the higher transmission location.
https://photos.smugmug.com/Hobby-Stu...MG_7484-XL.jpg

Had to remove the seat mounting holes and will need to trim the seat mounts, but no biggie. I'll just glue them in when the time comes.
https://photos.smugmug.com/Hobby-Stu...MG_7485-XL.jpg

Intrudes into the cabin, but if it's visible when the build is done I may just fab up a new floor to hide it.
https://photos.smugmug.com/Hobby-Stu...MG_7486-XL.jpg

While test-fitting the body I noticed an issue. One of the reinforcing plates I added for the hood sides is interfering with the floor. I could've (and should've) Dremeled away some of the floor, but why not risk screwing up and having to do some more bodywork instead? LOL!
https://photos.smugmug.com/Hobby-Stu...MG_7487-XL.jpg

Fortunately, I am one with my Dremel and no harm was done while making adequate clearance. :D
https://photos.smugmug.com/Hobby-Stu...MG_7490-XL.jpg

And the Axial trans has now been "extensively modified" to be a transfer case! :)
https://photos.smugmug.com/Hobby-Stu...MG_7488-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Body work on the front fenders is done.....well, unless I decide to add some lights on top. Not sure about that just yet. It took several layers of filler primer and loads of sanding, but I'm pretty pleased with the result. The veritcal sides of the fenders are still rather rough, but I have no good way to sand those surfaces. Hopefully it won't be too obvious after paint and clear is applied....
https://photos.smugmug.com/Hobby-Stu...MG_7524-XL.jpg

Sorted the steering, as well. Used a short Losi aluminum servo arm (I don't like using plastic bits) and put the tie rod under the knuckles. Bumpsteer is minimal and clearances under bump travel are good.
https://photos.smugmug.com/Hobby-Stu...MG_7526-XL.jpg

Took a file to the knuckles to get a bit more steering out of the TLT axle.
https://photos.smugmug.com/Hobby-Stu...MG_7528-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7529-XL.jpg

Ackerman looks pretty decent. My thumbs says hello!
https://photos.smugmug.com/Hobby-Stu...MG_7530-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Wow !! fenders look great. What primer did you use?

Re: Peterbilt 6x6 Medium Hauler
 

Thanks!! I just used some automotive filler primer I picked up from Advance Auto Parts. I'll see if I can get the manufacturer, but it wasn't anything special. But it did take about half a dozen rounds of priming/sanding to get it looking acceptable.

Re: Peterbilt 6x6 Medium Hauler
 

Since there have been no updates on the shipment of my tires and front wheels from Stella Models in Hong Kong, they suggested that I initiate a dispute via PayPal. On Friday I did just that and then ordered the same tires/wheels from Semi Joe. For the same overall cost I got it delivered in record time!! Great customer service and I'll remember that for sure.

All wheels/tires are made by Lesu. Pretty happy with them overall, except for a couple things.

• Maybe I'm just used to crawlers, but these tires are hard! But that's probably okay because I plan on making this rig heavy and also plan to haul heavy loads with it. Those stiff sidewalls will be needed at some point!
• The recess for the hex is too deep and needed a spacer so it wouldn't rub the knuckle.
• I wish it provided a narrower track width because the fronts stick out more than I'd prefer.
• The front tires could be a smidge wider. Visually, the just don't look that much wider than the rears. Not a big deal, though.

Here's the rears all mounted up.
https://photos.smugmug.com/Hobby-Stu...MG_7571-XL.jpg

Fronts mounted up.
https://photos.smugmug.com/Hobby-Stu...MG_7572-XL.jpg

Sorry for the crappy lighting, but I'm pleasantly surprised that the ride height looks pretty good. The front is only a bit higher than the rear, which is surprising given the front TLT axle. Once I add some weight in the form of electronics, battery, speaker, etc. then it may actually sit level! Schwing!
https://photos.smugmug.com/Hobby-Stu...MG_7573-XL.jpg

So I started mock up of the front fenders. Overall, I'm pretty happy with this positioning. Keep in mind the axle swings rearward under compression. I'll need to add some styrene under the hood sides, but I'll get to that later. For now I'm just interested in fender placement.
https://photos.smugmug.com/Hobby-Stu...MG_7574-XL.jpg

Again, sorry for the lighting, but here you can see just how far they stick out. It's not particularly awful given most heavy hauler or all wheel drive trucks' front ends are often fairly wide, but I'd hoped for better.
https://photos.smugmug.com/Hobby-Stu...MG_7575-XL.jpg

And can someone tell me what I did wrong with the install of my 5th wheel? Why is it angling the wrong direction?
https://photos.smugmug.com/Hobby-Stu...MG_7578-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

it looks like you did not put the little v shaped spring on the fith wheel shaft that holds the fith wheel so it leans towards the back

Re: Peterbilt 6x6 Medium Hauler
 

I just went through the instructions again and can't see anything I did improperly. In fact, there's even a photo in the back of the manual that seem to show the 5th wheel angled downward like mine. I'll try to get some photos tomorrow...

Re: Peterbilt 6x6 Medium Hauler
 

Check out Der Getriebedoktor for front axles that will fit your need. He also have them with cable operated difflocks :)

Re: Peterbilt 6x6 Medium Hauler
 

The truck is comming together nicely, btw!

Re: Peterbilt 6x6 Medium Hauler
 

You should fill all your tires & fuel tanks too with air rifle BBs and make a custom front bumper from 1/4 inch steel the proper width to cover your front tires. The heavier your truck is, the better it gets around in offroad conditions, especially dragging an empty or loaded trl.

Re: Peterbilt 6x6 Medium Hauler
 

Thanks for the input!

I'm pretty content with the TLT front axle for now. Lockable would be nice, but this thing is already becoming quite a money sponge so I'm trying to be careful how much I spend on it!

I may add some weight to the wheels, but if I do it'll be in the form of lead rope wrapped around the wheel so I can keep the foams. But I definitely plan to make the truck heavy whenever I can. I don't like lightweight vehicles! A steel bumper is a thought. Was planning on aluminum, but I may consider a steel bumper painted to match.

Re: Peterbilt 6x6 Medium Hauler
 

Again, sorry for the lighting, but here you can see just how far they stick out. It's not particularly awful given most heavy hauler or all wheel drive trucks' front ends are often fairly wide, but I'd hoped for better.
https://photos.smugmug.com/Hobby-Stu...MG_7575-XL.jpg

>I've used the inner rim of a Dual on powered steer axles to get the tire tread back under the fender. But, it's a standard width tire, like on your Lesu rims.
>You could try taking apart one of your Lesu Duals to see what the inner rim would look like on the steer axle.


And can someone tell me what I did wrong with the install of my 5th wheel? Why is it angling the wrong direction?
https://photos.smugmug.com/Hobby-Stu...MG_7578-XL.jpg[/QUOTE]

>All of my stuff run the older Tamiya plastic 5th wheel, and I just epoxy a ball point pen spring to the baseplate up underneath the front of 5th wheel to keep it tilted down.

Re: Peterbilt 6x6 Medium Hauler
 

I did try a rear on the front and it looked okay (with a 1.5" crawler tire stretched over it), but like you said, it's a narrow wheel and I definitely want a wide front on this truck.
https://photos.smugmug.com/Hobby-Stu...MG_7492-XL.jpg

Good idea on the spring for the 5th wheel. I'm still very surprised that this is (apparently) how Tamiya designed the 5th wheel to sit....

Re: Peterbilt 6x6 Medium Hauler
 

Taking a clue from roadranger's comments, I decided to try a slightly different version of using a spring to keep the 5th wheel at a better angle. I cut a paper clip and just glued it in place.
https://photos.smugmug.com/Hobby-Stu...MG_7615-XL.jpg

Then I reassembled the 5th wheel.
https://photos.smugmug.com/Hobby-Stu...MG_7616-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7617-XL.jpg

Now it sits better. The angle should be more aggressive and the super glue will likely not hold long term, but it's a good proof of concept that I can tweak.
https://photos.smugmug.com/Hobby-Stu...MG_7618-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Front end progress... I remade both sides to include the lower section at the bottom of the fenders. They're mirror images of one another so the left/right sides match.
https://photos.smugmug.com/Hobby-Stu...MG_7665-XL.jpg

I trimmed some of the hood sides inside the fenderwell. I didn't want to cut it out entirely and lose strength, but didn't like the look of leaving it intact.
https://photos.smugmug.com/Hobby-Stu...MG_7666-XL.jpg

And bonded to the truck's body.
https://photos.smugmug.com/Hobby-Stu...MG_7668-XL.jpg

I know a Pete 359 would have the front axle all the way forward, but that wasn't going to work well with my driven front axle so I had to take come creative liberties. I also tweaked the fender location for a bit more up travel.
https://photos.smugmug.com/Hobby-Stu...MG_7669-XL.jpg

At full droop:
https://photos.smugmug.com/Hobby-Stu...MG_7671-XL.jpg

And at full bump. I'm very pleased.
https://photos.smugmug.com/Hobby-Stu...MG_7672-XL.jpg

I still have some finishing work to do, but overall I'm really happy with how it's coming out! Soon it'll be time to fully prime/prep the body for paint. I guess I'd better decide on my colors and paint scheme soon!

Re: Peterbilt 6x6 Medium Hauler
 

It's been bugging me how far out these Lesu wheels sit. Here you can see part of the problem. The recess in the wheel for the hex is a solid 6mm deep. So best case, you're running a pretty wide 6mm hex just to keep the wheels off the axle. Pictured is a 5mm hex with a 1.5mm washer acting as a spacer. In this configuration, just more than half of the tire stuck outside the fenders!
https://photos.smugmug.com/Hobby-Stu...MG_7673-XL.jpg

So I decided to take matters into my own hands. :D I wanted to shoot for the ability to run a narrow 4mm hex to bring the track width inward 2mm per side. I stacked 4mm of washers into the wheel and took out the Dremel and my metal cut off wheel.
https://photos.smugmug.com/Hobby-Stu...MG_7675-XL.jpg

Using a steady hand I kept the blade flush to the washers as best I could and proceeded to cut down the recess in the wheel.
https://photos.smugmug.com/Hobby-Stu...MG_7677-XL.jpg

After the initial cut, things were functional, but kinda ugly.
https://photos.smugmug.com/Hobby-Stu...MG_7678-XL.jpg

I took a flapper wheel to it and it looked much better afterward.
https://photos.smugmug.com/Hobby-Stu...MG_7679-XL.jpg

It's hard to capture on "film", but now more than half of the tires are covered by the fenders with a 5mm hex. I have some 4mm hexes on order so we'll see if I can narrow it down just a bit more.
https://photos.smugmug.com/Hobby-Stu...MG_7680-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7683-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Narrowed down, do the tires rub on the springs at full turn?

Re: Peterbilt 6x6 Medium Hauler
 

I'm surprised no one has told you to buy a 6 tooth pinion from rc4wd? I have them on both my kings and a 55turn integy and have no problem pulling trailers off road. Also on the axle get a set of spider gears and add one between the ones in the difference, that will lock the axle for full traction. A lot of us on here do that also with zero issues

Re: Peterbilt 6x6 Medium Hauler
 

No, sir! Not even close, if I'm honest. The track width is narrower, but certainly not "narrow". It's still quite a bit wider than I'd prefer, but I think this is the best I'll be able to do.

You mean as opposed to the stock 10t? I haven't looked into regearing because I think the 2.6:1 with my Axial transfer case will be low enough. I can always look into regearing later, if need be.


Got a bit more work done. I removed all unwanted tabs from the axles to clean them up and also gain a bit more uptravel (in the rear axles). I also noticed the rear shocks were limiting downtravel so they're gone. Fronts were removed some time back. In addition, I drilled through the front TLT axle and secured it with some long screws.
https://photos.smugmug.com/Hobby-Stu...MG_7693-XL.jpg

On the bottom side I sacrificed a stock Hi-Lift spring to provide a bit more strength. It feels VERY secure now! You can also see some of the rough clean-up work I did on the axle. And yes, I know the hardware doesn't match. I need more panhead hardware in the correct length.
https://photos.smugmug.com/Hobby-Stu...MG_7694-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Sadly, this is max steering lock. It's currently limited by the stock dog bones/drive cups. I may modify them for a bit more angle or I may look into some CVDs and aluminum knuckles.
https://photos.smugmug.com/Hobby-Stu...MG_7695-XL.jpg

https://photos.smugmug.com/Hobby-Stu...MG_7696-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

In my quest for a narrower front track width, I picked up some Hercules Hobby wide wheels for the front. Aesthetically, I like them, but I think I prefer the Lesu wheels a bit more. Here's some pics.
https://photos.smugmug.com/Hobby-Stu...MG_7877-XL.jpg

One interesting thing to note is that with the Lesu wheels, all 10 screws need to be removed in order to access the wheel nut. On the HH wheels, you unscrew that black center section to reveal the wheel nut. Much easier, yes, but it doesn't look as clean to me. And no, the outer cover from the Lesu wheels won't fit the HH wheels.
https://photos.smugmug.com/Hobby-Stu...MG_7878-XL.jpg

The backsides.
https://photos.smugmug.com/Hobby-Stu...MG_7879-XL.jpg

Side by side. Same width, but the backspacing is different.
https://photos.smugmug.com/Hobby-Stu...MG_7881-XL.jpg

Here's where the rubber meets the road. Get it?? Road? Tires?? I kill me... Anyway, here's the offset with the modified Lesu wheels. A little less than half of the tire sits outside the fenders.
https://photos.smugmug.com/Hobby-Stu...MG_7882-XL.jpg

And here's the HH side. They tuck in quite a bit more and I really like it!
https://photos.smugmug.com/Hobby-Stu...MG_7883-XL.jpg

The slots in the wheels are more of a kidney bean and the Lesu rears are more of a circle, but it's hardly noticeable so I think I'll be sticking with the HH wheels for the front of this truck.
https://photos.smugmug.com/Hobby-Stu...MG_7885-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Smugmug is having issues right now so I can't link, but hopefully attaching the photo will work instead....

I couldn't use standard ol' socket head cap screws on these wheels in such a prominent location! Locked Up RC scale hardware to the rescue!

Re: Peterbilt 6x6 Medium Hauler
 

Looking good, and i really like the way you shaved the rim hexes

Since you sacrificed some springs to beef up the axle mount, why not build the 5th wheel spring from the scrap?

Re: Peterbilt 6x6 Medium Hauler
 

Thanks! And good idea on the remaining pieces for the springs. I need to see if I can locate them, but I might be able to come up with something. :)

Re: Peterbilt 6x6 Medium Hauler
 

Go to this thread and look at post #3, you will find these at your local hardware store. I bought the smallest they had for 35 cents. Take it apart and inside you'll find a spring almost identical to what Tamiya uses for the 5th wheel and trailer legs.

http://www.rctruckandconstruction.co...ad.php?t=11374

Re: Peterbilt 6x6 Medium Hauler
 

Thanks! I may have some sheetrock anchors in the garage and will look into it!

Also, I noticed my attached image earlier didn't work. My hosting site is back online so here's the image of the Hercules wheel with the scale hardware:
https://photos.smugmug.com/Hobby-Stu...MG_7893-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

From my experience with 6x6's the amount your tires stick out with the HH wheels is pretty close to what a real life 6x6 with 385/65R22.5 tires would have stick out. Add some fender flares and you have the right look.

https://i.ytimg.com/vi/hEaV-8M68Z4/hqdefault.jpg

http://www.timstrucks.com/4940263-R1-008-2A.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Thanks! Yeah, I think the current stance is pretty close to what I was hoping for.

And in case anyone is interested in how to access the wheel nut with these Hercules Hobby wheels, this is how it's done. The center cover simply unscrews. What's odd is that it's completely smooth and has no way to grab it with a tool to screw/unscrew. With the heads of the hardware in close proximity, it makes it difficult to get a good grip on it with your fingers! I will likely plasti-dip the ends of a small pair of pliers so I can grab it reasonably well without marring it. Not a fan of this design, though. I may pop a hole through it so I can insert a small allen key into it to tighten/loosen it. I'm curious what others may have done?
https://photos.smugmug.com/Hobby-Stu...MG_7910-XL.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Tommy,

I have a set of Lesu wheels very similar to these. They also have the removable center. Lesu drilled holes around the outside of the hub that allowed me to put a small allen wrench in it.

http://www.rclesu.com/1.14/img/W-200...E6%AF%82/1.jpg

Re: Peterbilt 6x6 Medium Hauler
 

Hey man!

That's a good idea. I'll have to look into it...

Re: Peterbilt 6x6 Medium Hauler
 

Would it work to put some mold release (dish soap) on the hubcap, and rtv a stick to it? Once cured use that silicone cup to remove/install.

Or if you have a die that size, run the cap through a couple times to loosen the fit?