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tpssonic · 04-15-2008, 06:14 AM

monzaz,

So the above pic is of an 8.5? That is what I have. The tabs at the bottom look like those of a BOP 8.2- that is what is confusing to me. Mine is a posi and has had 3.42 gears in it (not original). Being that it has 3.42s (using the driveshaft-turning method), I don't think it could be a 8.2. It has "407296" on the pig near the pinion as well as "CFD" (I think) , a big "CE", a "4" (again, not for sure) and has "C19" on the axle tube. Thanks for any information on this rear as there is very little information on this style of differential in the other GM rear end sites. All of the other sites do not mention this unit.

Is this a strong unit? I will be putting it behind a roller cammed 455 Pontiac in the near future.

04-15-2008, 06:14 AM	#5 (permalink)
tpssonic Junior Member Join Date: Apr 2008 Posts: 2	monzaz, So the above pic is of an 8.5? That is what I have. The tabs at the bottom look like those of a BOP 8.2- that is what is confusing to me. Mine is a posi and has had 3.42 gears in it (not original). Being that it has 3.42s (using the driveshaft-turning method), I don't think it could be a 8.2. It has "407296" on the pig near the pinion as well as "CFD" (I think) , a big "CE", a "4" (again, not for sure) and has "C19" on the axle tube. Thanks for any information on this rear as there is very little information on this style of differential in the other GM rear end sites. All of the other sites do not mention this unit. Is this a strong unit? I will be putting it behind a roller cammed 455 Pontiac in the near future. Last edited by tpssonic : 04-17-2008 at 08:13 AM.