Good basic KH drivetrain upgrades.

[Lmackattack]

Yea I'm a die hard Mack fan myself. Worked on them and driven them all. The old Mack's were always easy and cheap to fix. Give me **** and they come back for more. My 2nd gear was perfect it was hard to roll it over unless you were being real stupid. 3rd on the other hand was like a 85scale mph gear! I will have to look into that 4:1 box. Sounds like its a good deal.