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Old 09-09-2005, 07:35 PM   #1
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Default 3.29 gear ratio, good or bad

im doing an L67 swap and i have an engine but i need to get a tranny. i found one from a 200 gtp with a 3.29 gear ratio, that means quicker acceleration, right? what do most of the other L67 guys have? is it a good ratio?
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Old 09-10-2005, 02:58 AM   #2
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I thought that all L67'* had the same ratio which was either 2.97 or 2.93. I think it was 2.97 though... The NA 3800 can have the 3.29 ratio though. In fact, it'* the ratio I have. It does decrease gas mileage slightly, but, the acceleration is much better compared to the 3.06 ratio.
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Old 09-10-2005, 12:41 PM   #3
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My 3.33 ratio (only a 1990-1991 SSE thing) makes for snappier performance, but yeah, fuel mileage suffers. I'd be surprised if I got anything more than 30mpg on the highway, but I haven't done any formal calculations yet. Just rough guesstimations based on the gauge.
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Old 09-10-2005, 12:44 PM   #4
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Default Re: 3.29 gear ratio, good or bad

Quote:
Originally Posted by ELMACHOGERACHO
im doing an L67 swap and i have an engine but i need to get a tranny. i found one from a 200 gtp with a 3.29 gear ratio, that means quicker acceleration, right? what do most of the other L67 guys have? is it a good ratio?
Most of them do not come with 3.29 Ratios... They are usually 2.93 for the SC 3800... But I have seen some of the High performance GP versions come with a 3.29 ratio...

I forget what model it was...

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Old 09-10-2005, 05:33 PM   #5
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'04+ Comp G GTP'* were the only L67 car to ever see 3.29'* stock. 2.93'* is what all the other GTP'*. I would bet that if it has 3.29'* its either not from a GTP OR its from a GTP with a built trans...which in that case means its likely to be a built trans.

Shawn
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Old 09-15-2005, 03:44 PM   #6
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I just bought a trans for my car the other day being that my trans is shot with the 3.29 final drive ratio. Its from a 2000 + GPGT. I will gladly accept better accleration in return for a slight decline in gas mileage.
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Old 09-15-2005, 05:09 PM   #7
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Quote:
Originally Posted by asonofabeach69
I just bought a trans for my car the other day being that my trans is shot with the 3.29 final drive ratio. Its from a 2000 + GPGT. I will gladly accept better accleration in return for a slight decline in gas mileage.
you will have a problem with the PCM if you dont sent it to intense or the like to get reprogramed...
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Old 09-15-2005, 05:29 PM   #8
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This brings me to another question.... were all of the connectors the same between the various model years for the 4T65-E?

I know the 4T60-E had a few pin out changes while in use...

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Old 09-15-2005, 08:07 PM   #9
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Quote:
Originally Posted by jr's3800
This brings me to another question.... were all of the connectors the same between the various model years for the 4T65-E?

I know the 4T60-E had a few pin out changes while in use...
The bonneville trans is slightly different than the gtp trans in regards to a few line connectors and an internal mode switch as opposed to an external mode switch. I believe the changeover year for the mode switches was 2000.
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Old 09-16-2005, 04:07 AM   #10
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Quote:
Originally Posted by 1993 SLE
Quote:
Originally Posted by asonofabeach69
I just bought a trans for my car the other day being that my trans is shot with the 3.29 final drive ratio. Its from a 2000 + GPGT. I will gladly accept better accleration in return for a slight decline in gas mileage.
you will have a problem with the PCM if you dont sent it to intense or the like to get reprogramed...
I plan on purchasing a custom PCM from intense to avoid any problems.
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