[killer k]

how do you tell what size your rear end is ? (8.75-8.50) ?? I know it has a 373 gear and 28 spline axles and it will fit a 73- 76 chevy impala. Looking to put another gear in but unsure how to tell what size to buy. Thanks for any help !!

[WDCreech]

Tech question!!!

[cobalt327]

Originally Posted by killer k

how do you tell what size your rear end is ? (8.75-8.50) ?? I know it has a 373 gear and 28 spline axles and it will fit a 73- 76 chevy impala. Looking to put another gear in but unsure how to tell what size to buy. Thanks for any help !!

The mods might want to move this thread. Here is info on ID'ing GM 10-bolt non removable carrier rear ends like you have.

IIRC 1965-'76 B-body cars got the 8.2", the 8.5 began in '77. The 8.5" corporate rear end uses different control arms and I seem to recall them not swapping directly w/the earlier 8.2" rear end- but you can research it if need be.

And welcome aboard.

[big gear head]

Actually the 8.2 was last used in '70 in the Impala and Camaro, '71 was the last year in the Nova and '72 was the last year in the Chevelle. The 8.5 went into production in '71 and took the place of the 8.2 and 12 bolt. The '73 to '76 Impala rear end would be the 8.5 10 bolt.

[cobalt327]

I'd have said that too, but I had read something I thought that said differently a while ago- Corporate 10 bolt rear end - Impala Tech. Maybe I misunderstood the info or something. The b-cars I've dealt w/were limited to a '69 Impals SS 427 and a lame '78 Caprice w/a 305 I bought for resale.

[big gear head]

That '78 probably had the 7.5 rear end in it.

[cobalt327]

So what am I missing in the article above? I also saw another article regarding a '78 B-car rear end Rear end help [Archive] - Impala Tech and it confuses me as well.

My '78 had the 10-bolt corporate rear end. Might have been an option or something, I don't know- I really didn't care one way or the other w/it, as it was just to flip.

[cobalt327]

Never mind, as long as the info post #4 is right that's all that really matters.

[prostreet6t9]

Originally Posted by cobalt327

So what am I missing in the article above? I also saw another article regarding a '78 B-car rear end Rear end help [Archive] - Impala Tech and it confuses me as well.

My '78 had the 10-bolt corporate rear end. Might have been an option or something, I don't know- I really didn't care one way or the other w/it, as it was just to flip.

That article has some wrong info. BGH is correct.

[cobalt327]

Originally Posted by prostreet6t9

That article has some wrong info. BGH is correct.

Thanks. That's what I was afraid of. That's what I get for questioning what I already thought I knew in the first place.

[big gear head]

There sure is a lot of wrong information on the net. Too bad you can't fix everything. I don't know where Big Dave comes up with some of the stuff that he posts. Some of it is really off, but he trys hard. There is some stuff in that post on Team Impala that is completely wrong.

[cobalt327]

Originally Posted by big gear head

There sure is a lot of wrong information on the net. Too bad you can't fix everything. I don't know where Big Dave comes up with some of the stuff that he posts. Some of it is really off, but he trys hard. There is some stuff in that post on Team Impala that is completely wrong.

I'm sure he does and I shouldn't fault him anyway. It's still my fault for not checking on what I was seeing. But I figured a mod at a B-body site would be in the know, and since I'm decidedly NOT up on B-cars (I'd have guessed '72- ~'78 would be a corporate 10-bolt).

Not an excuse and all I can say is it won't happen again. I am sorry if the OP was thrown a curveball by my mistake, too.

[killer k]

Thanks for the info. I figured out that it is a 10 bolt 8.5 . I like the reponses though. the knowledge thrown out there ! thanks for the imput !