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

3.73 or 4.11

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Old Jun 11, 2006 | 05:37 PM
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Default 3.73 or 4.11

i just found out that i broke another pinion what should i go with this time 3.73 or 4.11 its a 6-speed
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Old Jun 11, 2006 | 05:44 PM
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4.11, it will def. feel better in the 6 speed car...
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Old Jun 11, 2006 | 06:14 PM
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Originally Posted by harvickgm
4.11, it will def. feel better in the 6 speed car...
X2...
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Old Jun 11, 2006 | 06:56 PM
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yea definatly the 4.11's. 3.73's are more for an auto
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Old Jun 11, 2006 | 07:19 PM
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Originally Posted by 68birdls1
yea definatly the 4.11's. 3.73's are more for an auto
Says who?
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Old Jun 11, 2006 | 07:48 PM
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well, also it depends on the t56.. the M29 like i and some others have you will be better with a 3.73, the M29 with 3.73 are still bigger than a 94+ M6 with 4.10's.... so it all depends..
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Old Jun 11, 2006 | 09:28 PM
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Originally Posted by harvickgm
well, also it depends on the t56.. the M29 like i and some others have you will be better with a 3.73, the M29 with 3.73 are still bigger than a 94+ M6 with 4.10's.... so it all depends..

Sorry I'm new to these cars ... can you explain? I have a 93 Z28 6 speed with a T56. Are you saying I'm better off doing 3.73 than 4.10s, but 94+ are better off doing 4.10s? Why?
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Old Jun 11, 2006 | 09:43 PM
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A quote from Speeddensity.org.

The 93 had two different manual transmissions available, both with different gearing than the 94+ cars. These were coded M28 and M29. The gear ratios were as follows:

GR - M28 -- M29 -- 94+
1 -- 3.36 -- 2.97 -- 2.66
2 -- 2.07 -- 2.07 -- 1.78
3 -- 1.35 -- 1.43 -- 1.30
4 -- 1.00 -- 1.00 -- 1.00
5 -- 0.80 -- 0.80 -- 0.74
6 -- 0.62 -- 0.62 -- 0.50

Of note: The M29 is the more rare and desireable of the two, and is very similar to the gear ratios of the newer Corvette ZO6.

The 93's got two different rear end gear ratios: The M28 came with 2.73's, the M29 got 3.23's and the A4 was available with either.
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Old Jun 11, 2006 | 09:45 PM
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the first gear in the M29 and M28 are alot taller... than the 94+... so a final ratio with the M29 and 3.73 are still going to be higher than a 94+ with 4.10's... you go to high and you run your RPM's up way to fast at the track.... its all coming of the line... you dont want to have to shift in 1.2 seconds..... it would hurt more than help...
if any of that makes any sense....lol....
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Old Jun 11, 2006 | 09:52 PM
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Ah that makes sense. I'm assuming there is a stamp somewhere on the trans that says what it is? I have my car on the lift right now so I can check it out if someone can tell me where to look. Thanks!
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Old Jun 11, 2006 | 10:02 PM
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na... look in your glove box at the RPO codes.. is it an M28 or M29???
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Old Jun 11, 2006 | 10:09 PM
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Cool it's an M29. Looks like the 3.73 is the gear of choice for me? This isn't a daily driven car, more of a weekend warrior / test and tune car.
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Old Jun 11, 2006 | 10:17 PM
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yes defently dont go know lower than the 3.73 with that trans i have done been there your best bet would be to do a ford 9 inch with a 3.70
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Old Jun 11, 2006 | 10:18 PM
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Originally Posted by 1fast97gsx
Cool it's an M29. Looks like the 3.73 is the gear of choice for me? This isn't a daily driven car, more of a weekend warrior / test and tune car.
Then by all means get 4.11's.
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Old Jun 11, 2006 | 10:22 PM
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Wouldnt it be 4.10?
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Old Jun 12, 2006 | 10:54 AM
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Interesting thread. Is it possible to swap a M29 in the place of a T56?
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Old Jun 12, 2006 | 12:16 PM
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4.10's!
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Old Jun 12, 2006 | 12:16 PM
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the m29 is a t56 just a earlier year t56, yes it will work
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Old Jun 12, 2006 | 12:58 PM
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I asked the same guestion, but went with the 4.10s. Love them so far. and my gas mileage is around 27 on the hwy, 20 mixed and 15 in city.
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Old Jun 12, 2006 | 02:14 PM
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4.10, 4.11, not much difference... lol
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