Cheap 10 Bolt Swap/R&R Without Upsetting Gear Lash?
#1
Staging Lane
Thread Starter
Cheap 10 Bolt Swap/R&R Without Upsetting Gear Lash?
Hey y'all,
I recently picked up a 3.43 rear end out of a 99 Z28 to swap into my 94 Firebird Formula. It's basically just the diff housing and gear carrier, all the accessories, brackets and axles have been removed. My plan is to swap everything it doesn't have from my current 2.73 Auburn diff into the new one. I already know ABS won't work because this was a 4 channel rear (no reluctor on gear carrier), but is there anything else I would have to pick up to make it fit that wouldn't already be in my car? From p/n s I've surmised that the carrier cross pin and bolt that locks in the axles swaps between the torsen and auburn carrier, can anyone confirm this? And finally, what are some relatively cheap longevity/wear items i can replace in this new rear end that won't require me taking it to a shop to reset the gear lash? Thanks for any help
I recently picked up a 3.43 rear end out of a 99 Z28 to swap into my 94 Firebird Formula. It's basically just the diff housing and gear carrier, all the accessories, brackets and axles have been removed. My plan is to swap everything it doesn't have from my current 2.73 Auburn diff into the new one. I already know ABS won't work because this was a 4 channel rear (no reluctor on gear carrier), but is there anything else I would have to pick up to make it fit that wouldn't already be in my car? From p/n s I've surmised that the carrier cross pin and bolt that locks in the axles swaps between the torsen and auburn carrier, can anyone confirm this? And finally, what are some relatively cheap longevity/wear items i can replace in this new rear end that won't require me taking it to a shop to reset the gear lash? Thanks for any help
#3
Staging Lane
Thread Starter
The cones in the Aurburn are completely trashed, the car only does one wheel peels. I also want to upgrade the gear ratio and i picked up the 3.43 rear for only $50.
#4
TECH Veteran
iTrader: (4)
3.42s' were issued with 6 speeds and manual transmissions are not 'kind' to the little GM 10 bolts. I would suspect the 99 rear was pulled apart to get the backing plates to use on a larger aftermarket rear. Are the carrier and ring//pinion still in the 99 rear intact OR 'loose parts' ? If intact the setting of the 'gears' should still be okay OR they could've been 'impacted' and be 'noisy'. It's always a 'roll of the dice' to go with a used 6 speed rear. Being that you would be using it in an automatic car, that would not make anything of the 99 rear worse.
#5
Staging Lane
Thread Starter
3.42s' were issued with 6 speeds and manual transmissions are not 'kind' to the little GM 10 bolts. I would suspect the 99 rear was pulled apart to get the backing plates to use on a larger aftermarket rear. Are the carrier and ring//pinion still in the 99 rear intact OR 'loose parts' ? If intact the setting of the 'gears' should still be okay OR they could've been 'impacted' and be 'noisy'. It's always a 'roll of the dice' to go with a used 6 speed rear. Being that you would be using it in an automatic car, that would not make anything of the 99 rear worse.
#7
Staging Lane
Thread Starter
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#8
Staging Lane
iTrader: (2)
I'm guessing 01ssA4 is implying that 10 bolts are not the toughest things to use. Make sure pinon preload is correct, set backlash correctly. I shoot for the middle, let's say spec is .006-.010" shoot for .008". Then check gear pattern once again shoot for middle of ring gear tooth. Vertical and horizontal. You may need to borrow a dial inch lb wrench if you don't have one but you can buy a dial indicator fairly reasonable with a magnetic stand. Plus you can use it for numerous other things automotive related. Don't run it unless everything does check out or it will not end well. That is my advice from the 6 ring and pinon changes I've done and all have worked flawlessly because these principles were followed to the nth degree.