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#1
12-07-2003, 10:55 PM
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Camaro rear-end
I had always thought that 3.42s came standard on all v8 cars, but now information i'm reading begs to differ stating that 2.73s actually standard... http://www.chevroleteurope.com/engli..._trans_z28.htm
I recently bought a formula rearend to put in my '96 3.8 (without the covetted y87 package) to aquire an LSD and 3.42s (mine's stock 3.08) under this impression. Am i correct in realize i actually got 2.73s rather than 3.42s?? Can anyone shed some light on this?? 
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#2
12-07-2003, 10:59 PM
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Re: Camaro rear-end
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#3
12-07-2003, 11:04 PM
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Re: Camaro rear-end
there were many options for the rear ends, open, LSD, 2.73, 3.27, 3.42, and in SLP cars 3.73 i believe. if your rear end came from a formula, basicly the base firebird, i would wager that even with the LSD you got 2.73 gears. the V8's got high gearing for gas milage. your best bet, if you want the higher gears, is you buy the rear out of a V6 bird or camaro. they were geared lower to have better acceleration. they would prolby have at least the 3.27. your best bet, and ill see if i can do this for you. is to find the build codes for the gear ratios. and look in the doner car and find the build code, and match it up. really the only way to be certain. well, the easiest way anyway. but ill see what i can find for ya at work, and post tomorrow.
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#4
12-07-2003, 11:05 PM
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Re: Camaro rear-end
oh also, i see im stuck in third gen mode, and gave the wrong ratios, and forgot to mention that the newer cars had a very desireable torsen option. if you can find a torsen rear, grab it. i dont know if thats what you meant as a LSD but the two are not similar. torsens are MUCH better.
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#5
12-08-2003, 12:01 AM
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Re: Camaro rear-end
2 things... 1)the formula isn't a base-model, it's a v8 and 2) you mention buying the rear form a v6, but that is what I have, a '96 3.8 v6 (not to be confused with the v8 5.7) with a stock 3.08 rear. The only v6 rear that is an advantage to me is the rare and unavailable y87 performance package rear.
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#6
12-08-2003, 07:23 PM
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Re: Camaro rear-end
While the formula does have a V8, the rest of the car is basicly base model. But any event you got your self the wrong stuff. You probably want a rear end from a B4C car, but good luck. If you want to save time and head ache trying to find a donor car you should go to jegs and find a LSD set up with 3.42 gears, that should show your V6 off a little.
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#7
12-08-2003, 07:57 PM
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Re: Camaro rear-end
ok, if you want stock parts, and are just looking to get gears, or a pumpkin. here are the build codes.
GU2 = 2.73 GU4 = 3.08 GU5 = 3.23 GU6 = 3.42 G80 = LSD which i think is the torsen in those years. someone call me on this if im wrong. the build sheets on these cars that will show these codes, is in the glovebox i think, i know its somewhere on the instument panel. and im pretty sure its in the glovebox. just look for the GU* and youll know what gear the car orignialy came with. as far as after that, its a crapshoot that the owner didnt change it or that its the same rear that was originally in the car. as far as determining that, use your gut and look everything over and see if it looks stock. no way to really know till you pull the gears and measure em.
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#9
12-08-2003, 08:03 PM
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Re: Camaro rear-end
so i would reccomend going back and if possible find the car you bought and look in the glovebox. there is a stamp on the rear axle, that can tell you, and it might be on there, but the stamp was shallow, and rusts off and wears and becomes unreadable very quickly. but if its there, it should be on the passenger side axle shaft, between the front and top of the tube. about halfway across from the pumpkin to the axle seal.
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#15
12-17-2003, 12:43 PM
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Re: Camaro rear-end
I've got a question, I'm new to the camaro scene with my recently purchased '96 3800 5sp. The guy who had it before me was going to turn it into a drag car and was ready for a 400 small block drop. He had already finished the rear end and put in 3.73 gears. You say that the coveted y87 rear ends are the best? what exactly are they? Does anyone have any specs?
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but i dont know what youre talking about, i like my passenger seat guillotine 
