10 bolt carrier?

[esoteric18]

I am in the process of a LT1 swap into my firebird the donor car is a 94 z28 6 speed and i was looking at getting 4.11s but i have no clue if its a series 2 or series 3 rear end in the z28. Any ideas? any help would be greatly appreciated

[98blackbeauty]

I would imagine its a 2, you can tell by how many plugs for the antilock brakes it has. I believe it was after 98 they went to 3 and there were sensors on each back wheel. NOTE: you will have to swap antilock unit or at least the proportioning valve to get correct braking on rear going from v6 drum to disk rear brakes.

[esoteric18]

i figured about the proportioning valve. alot goes into the swap you dont realize until your ready to do it head on lol. ive been researching for a couple years and until now just didnt realize all the small things

[c0ncEpT]

I would imagine its a 2, you can tell by how many plugs for the antilock brakes it has. I believe it was after 98 they went to 3 and there were sensors on each back wheel.

Not true. Your thinking of 3 vs 4 channel housings Larry.

If the gear set is 2.73 it has a 2 series carrier. If it has 3.23 or up it has a 3 series carrier.

The flange on a 2 series carrier is 5/16 farther left(in relation to the pinion when installed) than a 3 series carrier. You can use a 2 series carrier with a steeper gear set by going to a "Thick" gear which will have the extra 5/16 of thickness built into the ring gear

Moral of the story is that since you have a rear from a 94+ 6 speed it will have a 3.42 meaning that it a 3 series carrier.