truck had the 2 pinion,blow it up, shop said go with 4 and you will be all set, you will never have to replace it, well I have had to replace it 3 times. dose anyone have a stronger set up. also we changed the motor from a 25 to a 28. any help would be great. thanks

i run the truckzillla with the 4.8hp motor and 7 inch tires and have never broke the 4 way diffs, ive even broke the drive shaft....

you need a metal diff cup also, then you will never break it, if you drive normal, if your hard on the gas when the truck lands from a jump, your gonna rip something out of it everytime !! i raced my truck with a 27 in it with teh same diffs for 4 years.

thanks I will try the metal diff cup.

try putting a shim in to titen the gear lash in the diffs my friend has a .30 in his and i shimed it for him and now it is awsome

well I shimed it up and I will run it over the weekend to see what happends.