rear end gears. - Team Camaro Tech
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post #1 of 8 (permalink) Old Nov 29th, 00, 01:56 PM Thread Starter
 
Join Date: Jul 2000
Location: san jose ca
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i have a 95 z28 camaro,what kind of gears should i put in.some people tell me 3.42's,and some tell me 3.73's.what should i go with,im confused.
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post #2 of 8 (permalink) Old Nov 29th, 00, 05:41 PM
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Freddie
 
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You may already have 3.42s. Check the RPO code tag in the console. It is a white decal with a bunch of 3 digit codes in alphabetical order. Check the codes that start with a G. These are the rear end codes. A code GU6 is 3.42 ratio. A code G80 is posi. If you post your G codes I can tell you what you have. What transmission do you have? The 6 speed cars can easily run 4.10s where the automatics would probably be better with 3.73s for highway use.

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'69 RS/SS396 pro street
427/4spd/9"
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post #3 of 8 (permalink) Old Nov 30th, 00, 02:59 AM
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I agree, if you are a six speed, you probably already have 3.42's. I think the autos are higher gear (numerically lower). I have ridden in both an auto with 3.73's and a six speed with 4.10's and let me tell you, they really wake up an already out of bed LT1.

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Mark

1992 Firebird 355/Six Speed (Soon to be LT1)
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.963 @ 119.95 Slicks / 11.997 @ 114.23 Radials
"Speed KILLS, so drive a FORD and live forever!"
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post #4 of 8 (permalink) Old Nov 30th, 00, 06:03 AM Thread Starter
 
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my car is an automatic,my friend told me what gears i have,before he moved.i have 2.73's.so i take it,that 3.73's would be a good choice.
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post #5 of 8 (permalink) Old Nov 30th, 00, 01:06 PM
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Freddie
 
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I'd say you would be happy with the 3.73s.You'd have much better take off power or I should say tire smokin' power and still be able to cruise down the highway easily.

------------------
'69 RS/SS396 pro street
427/4spd/9"
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post #6 of 8 (permalink) Old Nov 30th, 00, 05:17 PM
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My .02 on this,

3.73 with NO overdrive tranny would not be particularly good for highway cruising. At 75MPH, I was turning around 3400-3500RPM which I feel is too high.

With my current BB setup, R700 tranny and 3.73's I am turning @ 2500 at 75MPH (much nicer).

If I had a LT-1 or any "Non-stroked" small block for that matter, 4.11 and an overdrive tranny would be just about ideal. BB's don't need the 4.11's so 3.73's are fine here.

Remember also that LT1's LOVE alot of gearing. I would gear a 383 stroker the same way as a BB (3.73 with Overdrive).

The 302 is a different animal. Here I would go 4.56 gearing with OVERDRIVE because of the solid lift cam and the narrow power band 3500-7500.
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post #7 of 8 (permalink) Old Dec 1st, 00, 09:41 AM
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I intend to run 3.55's in my 68 with a radical 383 and either a tremec OD trans or a Richmond 6

any thoughts on this setup?
John
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post #8 of 8 (permalink) Old Dec 1st, 00, 12:49 PM
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Ron
 
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I have 4.10s in my 95 Z28 convertible. It had 3.42s originally and they were like driving a family car with my 6 speed car. I went to 3.73s first and you might like them better, I loved them before I stripped the ring gear. The 4.10s are very strong out of the hole but if you have mostly stock car it will run out of breath real fast. Plus, you will have that annoying driveshaft vibration that shows up sooner with deeper gears.
Ron

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95 Z28 Convertible M6
70 Chevelle SS 396,
66 Nova SS 327-350HP M20
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