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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

rearend gear

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Old Jun 26, 2009 | 08:26 PM
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Default rearend gear
what size of rear gear is in the 1996 z28 thanks i think its a 373 not too sure any help
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Old Jun 26, 2009 | 08:36 PM
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its not a 3.73. Not stock. Stock for the 97 SS was 3.42, and if I am right, a 96 Z Auto had 3.23's???
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Old Jun 26, 2009 | 09:04 PM
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Yeah, M6 car was 3.42's.
A4 car's had either 2.73's or 3.23's. Not sure if the SS's all had 3.23's or not. You'd have to check your option codes.
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Old Jun 26, 2009 | 09:05 PM
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thanx so it might be a 3.42 i think its stock gear in thr rear end
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Old Jun 26, 2009 | 09:08 PM
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Originally Posted by fx4offroad
thanx so it might be a 3.42 i think its stock gear in thr rear end
If it's a 6 speed than yes, stock gears are 3.42's. Time to step up to some 4.10's.
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Old Jun 26, 2009 | 09:18 PM
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it a auto trans but im putin a turbo 350 and 3500 stall in it
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Old Jun 26, 2009 | 09:59 PM
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they only had stock 3.42's in the SS M6 though...not the Z28. He has a Z28 so they wont be 3.42's
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Old Jun 26, 2009 | 10:01 PM
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either way you look at it though he doesn't have 3.73's, so its definately time to upgrade...I am gonna go with 3.73's, but he has an auto so I think he should do 4.10 like slp said
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Old Jun 26, 2009 | 10:33 PM
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I've run my 94' z28 w/ 3.73's with the factory 4L60E with bolt on 350, moderate HC 355 and then moderate 383---->converted T56 (383). I thought the 3.73's were the perfect gear for a 4l60E DD in all combos but alil to numerically low for the 6 speed...however your looking at a A3, guess it depends on your intentions and far high reving your motor is and tire size.
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Old Jun 27, 2009 | 01:49 AM
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Originally Posted by Z28Camaro30Ann
they only had stock 3.42's in the SS M6 though...not the Z28. He has a Z28 so they wont be 3.42's
All 6speeds from 94-02 had 3.42's.
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Old Jun 27, 2009 | 02:47 AM
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so the Z28 6 speed had 3.42's as well??? I thought it was only the SS's...
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Old Jun 27, 2009 | 02:53 AM
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Turn the wheel, count how many times the drive shaft spins.
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Old Jun 27, 2009 | 02:55 AM
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Originally Posted by Chevyguy358
I've run my 94' z28 w/ 3.73's with the factory 4L60E with bolt on 350, moderate HC 355 and then moderate 383---->converted T56 (383). I thought the 3.73's were the perfect gear for a 4l60E DD in all combos but alil to numerically low for the 6 speed...however your looking at a A3, guess it depends on your intentions and far high reving your motor is and tire size.
I had 3.08s in my 69' A3 camaro and they were the perfect gear for cruising and DD. Had I want to race it more, I would have went with 3.55 max.
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Old Jun 27, 2009 | 03:38 AM
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^^^ good method to check them. 2 1/2 turns means 2.73, just over 3 is 3.23. and btw 4.10s are way to big for an A4. IMO:

3.42s-For a DD who hits the strip every so often

3.73s-For a DD that is more focused on their 1/4 mile times

4.10s-For hardcore drag car
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Old Jun 27, 2009 | 04:13 AM
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Originally Posted by Z28Camaro30Ann
so the Z28 6 speed had 3.42's as well??? I thought it was only the SS's...
Who have you been getting your info from...really...???
Yes, ALL '94-'02 m6 fbody cars came with 3.42 gears.
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Old Jun 27, 2009 | 08:46 AM
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apparently some people who have no freaking clue what they are talking about....lol. I'm working on fixing that lmao
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Old Jun 27, 2009 | 02:47 PM
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Originally Posted by Z28Camaro30Ann
apparently some people who have no freaking clue what they are talking about....lol. I'm working on fixing that lmao
Good. Ask all questions here, and you will be someone elses resource soon.
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Old Jun 27, 2009 | 05:19 PM
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RPO code rear gears 94-02

GU6 = 3.42 (all 6 speed Z28 - SS)
GU5 = 3.23 (3 series carrier)
GU2 = 2.73 (2 series carrier)
Last edited by LT1; Jun 27, 2009 at 07:10 PM.
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