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Do i have 4th gen rear end?

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Old 01-03-2012, 09:47 PM
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Car: 1991 Camaro Z28
Engine: 350ci TPI
Transmission: built 700r4
Axle/Gears: 4th gen rear end
Do i have 4th gen rear end?

Im thinking previous owner swaped the rear end to a 4th gen.one. What do u all think? Stock 91 wheels stick out to much and i dnt like it as much. Is there anything i can do to push those wheels in? I am guessing its a 4th gen rear cuz i really sticks out and i dnt think u can do that wth a 3rd gen rear unless u use spacers right? And last question, the 3rd gen axle shafts are enterchangable with 4th gen? Cuz wouldnt the 3rd gen wheels not fit if it was a 4th gen rear cuz of the bolt pattern?
Heres a pic of the rear
[IMG][/IMG]
[IMG][/IMG]
Old 01-04-2012, 07:15 AM
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Re: Do i have 4th gen rear end?

Originally Posted by robg91z
Im thinking previous owner swaped the rear end to a 4th gen.one. What do u all think?

And last question, the 3rd gen axle shafts are enterchangable with 4th gen? Cuz wouldnt the 3rd gen wheels not fit if it was a 4th gen rear cuz of the bolt pattern?
Certainly appears to be fourthgen.

Third- and fourth gen axle shafts aren't interchangeable. The bolt pattern is identical.

EDIT: The thirdgen rear is approx. 57" from backing plate to backing plate and 62" from axle flange to axle flange.

JamesC

Last edited by JamesC; 01-04-2012 at 07:19 AM.
Old 01-04-2012, 06:06 PM
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Car: 1991 Camaro Z28
Engine: 350ci TPI
Transmission: built 700r4
Axle/Gears: 4th gen rear end
Re: Do i have 4th gen rear end?

So their the same bolt pattern? If i put 4th gen wheels will sit more inside the fender? Cuz they stick out to much with my 91 wheels
Old 01-04-2012, 06:10 PM
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Re: Do i have 4th gen rear end?

yes
Old 01-04-2012, 06:16 PM
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Re: Do i have 4th gen rear end?

Originally Posted by robg91z
So their the same bolt pattern? If i put 4th gen wheels will sit more inside the fender? Cuz they stick out to much with my 91 wheels
To put 4th gen wheels on, the rear wheels will fit right on, but you'll need 2" bolt-on spacers for the 4th gen wheels to fit on the front.
Old 01-04-2012, 06:25 PM
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Re: Do i have 4th gen rear end?

Just lower it and that would be some nice fitment! Or...Sell me the rims/tires and buy 4th gen rims/tires haha.
Old 01-04-2012, 06:29 PM
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Car: 1991 Camaro Z28
Engine: 350ci TPI
Transmission: built 700r4
Axle/Gears: 4th gen rear end
Re: Do i have 4th gen rear end?

Haha im actually trying to look for one front wheel but yes dropping it on some sportlines is my next modd
Old 06-11-2012, 06:31 PM
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Re: Do i have 4th gen rear end?

So... How does this effect driving? Does does fourth gen drive any different? Like, is there a noticeable difference?
Old 06-11-2012, 07:14 PM
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Re: Do i have 4th gen rear end?

No, the 4th gen wheels won't make any difference to how it drives at all, except for fixing that poseur stance that looks like cold leftover yesterday's a** with those pizza-cutter stock wheels on there.
Old 06-11-2012, 08:36 PM
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Re: Do i have 4th gen rear end?

But since the wheels stick out a bit more is there any issues with the tires hitting the fender anywhere?
Old 06-11-2012, 09:37 PM
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Re: Do i have 4th gen rear end?

Are you sure you don't have the front wheels on the back?
Old 06-11-2012, 09:56 PM
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Re: Do i have 4th gen rear end?

Front wheels on the back dont look anything like that. That is definitely fourth gen rear. This is my car with front wheels on the rear:



No one would know unless I told them.
Old 06-11-2012, 10:12 PM
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Re: Do i have 4th gen rear end?

Aah, ok. I remember doing that to my 91 RS but forgot how much the difference was.
Old 06-11-2012, 11:52 PM
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Re: Do i have 4th gen rear end?

So those of you with this swap, do you ever have issues with the back wheels hitting that lip on bumps?
Old 06-12-2012, 11:28 AM
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Re: Do i have 4th gen rear end?

Originally Posted by 92CamaroRS-BWJ
So those of you with this swap, do you ever have issues with the back wheels hitting that lip on bumps?
No. For the short period I had to use the 3rd gen wheels, it never rubbed.

It looked terrible. Much better looking with 4th gen wheels.
Old 06-12-2012, 11:59 AM
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Re: Do i have 4th gen rear end?

go with some 88-96 corvette ZR1 replica rims in 17x11 and 17x9.5. I bought these from a 3rd gen guy who had them on his 90'ish metallic blue z-28. They looked awesome on his car but now my vette has them.

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275/40/17 and 315/35/17

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Last edited by Jeffs82TA; 06-12-2012 at 12:06 PM.
Old 06-19-2012, 05:39 PM
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Re: Do i have 4th gen rear end?

ZR1s are classic.
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