im looking at getting a cosworth rear axle for my sierra, 4x4 ones seem to be cheaper, but can you fit a 4x4 complete rear axle with diff to use as 2wd running gear? or will it give me problems and be slow id imagine?

 

2wd diff is stronger than a 4x4

 

4x4 are shit

 

it does fit straight on and can be used,
but as said the 4x4's are smaller and not so strong so prob will rip the teeth off the crown wheel before long,
might be better just paying the extra for a 2wd set up,
2wd cossy's are famous for killing diffs, so fitting a smaller than standard diff aint realy a great idea for reliability

 

Depends how much power you're running, very little difference between 2wd and 4wd apart from size of mounting.
tabetha

 

Wat if your running 350bhp would a 4x4 one work den or would it just be a piece of piss.!

 

All depends on what torque u are running if u have around 350lb ft then a rwd or a 4x4 one will be shit!

 

350 will be fine, so long as you don't use launch techniques on every pull away.
tabetha

 

Can 4x4 diff/driveshafts etc. be fitted to 2wd beam?

 

ok cheers for the info, only running pinto power atm but it will have to run cosworth power eventually so i wont bother with the 4x4 rear axle as i cant help but give whatever car im driving some welly

 

you need the driveshafts to go with the diff being used as the diameter of the flanges are differant