Re: Mack DT 3rd rebuild
 

It is holding up nice Craig, the only thing that i had to do it lately was re-glue a couple of tires that spun loose.

The axle are all modified with rubber washers in place of the metal shims in the diffs. The rubber washers force the spider gears together so hard that it acts like a posi rear end but, if you are carrying 15 pounds of dirt and turn sharp the spider gears will turn.

You can really see them all turn in this vid @ 3:50 mark.

https://www.youtube.com/watch?v=_H-dIBU6laM

Last year i had to open one axle up because the posi action was gone and i found the rubber washers were ground to shreds. So, i cleaned it out and made new washers for it. I just took both of the axles out of the king hauler after the Cabin Fever show and did the rubber washer mod to them as well.

Thanks Bo. :-)

Re: Mack DT 3rd rebuild
 

I hope everyone is paying attention! This is golden RC info to have from one of the best! Great thinking Scott. I'm definitely doing that to my dump truck. I have a 4th spider in there right now so nothing permanent about it and can do this! :cool::)

Re: Mack DT 3rd rebuild
 

Thank You very much Supermario! :o

To make the rubber washers i use regular thickness bicycle inner tube rubber and just cut them to shape and add some fresh grease to the spider gears just before you final assemble.

Re: Mack DT 3rd rebuild
 

I should also add that the tight fit of the rubber washer against the backside of the bevel gear and diff housing also contributes greatly to preventing the spider gears from rotating..it is not just the pressure on the spider gears that makes the mod work. Which is probably why the gears seem to be holding up fine.

Re: Mack DT 3rd rebuild
 

Right Mario spot on and Scot knows how to drive too. and that is important folks watch the video how to make the hill like it was a minor bump !!! :cool::cool::cool:

Re: Mack DT 3rd rebuild
 

Way to innovate!
Cheers!

Re: Mack DT 3rd rebuild
 

Tough little truck Scott!