shawty82

hey guys to start off i really blew my stock 2.73 gears bad i need a whole new differential. so i went to the junkyard and got a 1994 rear end with 2.23 gears in it btw i have a 91 rs will i be able to swap in this rear end if not can you let me know my options also im currently rebuilding a 350 looking for around 350 to 400 hp thnx

1981LT1

iTrader: (1)

Hopefully you meant 3.23 gears like you stated in your title. The rear will physically bolt in but your backspacing will be way off. The 4th gen rears are wider than the 3rd gen., not to mention the e-brake cables are slightly different. It would be cheaper for you to get a complete rear end rebuild kit and new gears. Otherwise, your wheels will stick out from your fenders, unless you need an excuse to get new wheels.

shawty82

ya i meant 3.23 gears srry but i dont want to swap the whole rear end i know that makes it 2 inches longer i just want the rear differential from the fourth gen and swap it in the third gen housing is that possible thnx and if u can tell me what i all need to do this that would be awsome thank you

1981LT1

iTrader: (1)

I am not 100% sure if the axle's have the same number of splines. If so, then yes, the gearset will swap over. You should definately replace the carrier bearings, the inner and outer pinion bearings, the pinion seal, and the crush sleave. Any rebuild kit will have these parts or you can get them separately at the local Autozone. You will also need a shim pack assortment for the carrier and the pinion, a the proper tools to set the backlash and preload.

As you can see, this is a pretty detailed job and you may want to have somebody who knows what they are doing tackle this. It isn't hard but the tools are not worth buying if you are only going to do it one time.

shawty82

ok thank you all i needed to know if it was gonna fit cause i didnt wanna have to pay the money if i didnt have to but i feel better now thnx im going to buy the installation kit for it and have my mechanic do it for me if u guys would like i have pictures to show of how bad i blew the whole differential its pretty cool but ya thanks again yall

shawty82

also could you guys build my knowledge with the shim pack and what i need to know about that cause i was told bout it once but i still have no clue wat it is