LS1 RX7 FTW

I was wondering if I could get some help on this, something went wrong in my rear diff, my friend was driving my car and he shifted from 2nd to 3rd and bam! No power to the wheels and rear diff just clunks now.
I towed the car to my job and it clanked the whole way, any idea what could be wrong inside of there? I have a t2 4.10 rear diff that was welded. Would it be cheaper to rebuild or replace? Im running about 330rwhp also out of a ls1. Thanks

WJM ROTARIES

Sounds like you need a new diff assy usually when they go bang they are toast

LS1 RX7 FTW

Thats what I was thinking, time to locate a new diff, but thanks also. Its weird that the NA rear diff that was in the car lasted for years and ran 11 sec 1/4 mile times and this diff has never seen the track and was recently put in but went boom.

WJM ROTARIES

I would look for one with LSD and not a welded one it will last longer and nicer to drive

LS1 RX7 FTW

The one that was in there had LSD, but it was welded also. Couldn't turn without the rear wheels spinning. Ill try to find another one though, I really appreciate your help.

lduley

iTrader: (1)

Usually weld jobs on rear ends don't hold up very long

fc323

I don't understand the logic behind this....

LS1 RX7 FTW

The previous owner did it like that, I have no clue why either.

sp0ngebob

iTrader: (1)

yah turning a diff into a lincolin locker normally only makes sense when starting with an open diff. the whole point of an LSD is that you shouldnt need to weld it.

and if you heard a bang, make sure your didnt just snap a u-joint or break a driveshaft. im sure you already looked. but its a possibility.

LS1 RX7 FTW

Yea man the car was crazy trying to do low speed cornering, and i put it on a lift and checked everything. When i turn the wheels the diff clunks, and it barely spins on its own power when in the air. The noise kills me a little inside lol

fc323

The spider gears are probably destroyed since that looks like the only thing you can weld on a lsd

sp0ngebob

iTrader: (1)

thats the only thing you can weld on any diff.


pull the cover off the diff and watch the chunks of metal come out.

LS1 RX7 FTW

I will be pulling the diff this week, have another one lined up for this weekend, and ive already checked the fluid and saw metal flakes in it. I know its bad once i open it lol

LS1 RX7 FTW

Also should my axles be fine? I was wondering if I could reuse them

skeeter0510

next time u wanna think about welded diff u should consider haveing it boxed. dont see why u wouldnt be able to reuse the axles tho

sp0ngebob

iTrader: (1)

as i recall the axles bolt onto the diff using a flange. looks like an industrial pipe. theres no reason you shouldn't be able to re-use those as long as you get a tII diff.