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Old 05-18-2006, 10:23 AM   #21
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Quote:
Originally Posted by CSFiend
If it came down to changing the gear ratio, how far into the transmission are we talking? Forget the PCM issues, just strictly mechanical -- i can R&R transmissions all day long or open them up to replace solenoids, but to get any deeper than the valve body is still Greek to me. I'm curious because I had a H*** of a time trying to find a 3.06 trans for mine, and I'm going to need another transmission by the end of the year. If it were just a matter of swapping something fairly straightforward, I'd pick up a 2.84 and swap parts.
I forget exactly what the book says.... But I think you may have to change the Final drive, and the drive and driven sprockets.... I'd have to look to see what the diffrences are...

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Old 05-18-2006, 11:25 AM   #22
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boy if only i had the 4t60-e Service Manual with me.....its at home under dads lock and key....maybe i can ask him
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Old 05-18-2006, 11:38 AM   #23
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by CSFiend
If it came down to changing the gear ratio, how far into the transmission are we talking? Forget the PCM issues, just strictly mechanical -- i can R&R transmissions all day long or open them up to replace solenoids, but to get any deeper than the valve body is still Greek to me. I'm curious because I had a H*** of a time trying to find a 3.06 trans for mine, and I'm going to need another transmission by the end of the year. If it were just a matter of swapping something fairly straightforward, I'd pick up a 2.84 and swap parts.
I forget exactly what the book says.... But I think you may have to change the Final drive, and the drive and driven sprockets.... I'd have to look to see what the diffrences are...
so yeah, sounds like i should just keep this car as is in that respect and when i want more speed, get an 96-99 SSEi ib been wanting
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Old 05-18-2006, 03:22 PM   #24
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After you get the valve body off the gears and chain are right there, they just slide on and off. The valve body/transmission pump is several pieces, then another cover, then the final drive chain. You slide the chain off, slide the new gears on, replace as removed and button it up. I'd say it'* at least a weeks job. Transmission MUST be removed, it'* not an in-car procedure. And get a FSM if you don't have one, you will need it. Many, many times over.
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Old 05-18-2006, 03:55 PM   #25
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it should be noted that trans work is not something that i would venture into nor would many members on the site.....even with the GM 4t60 Service manual (which i have), there are many things that can go wrong if things are not put back correctly
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Old 05-18-2006, 03:59 PM   #26
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yeah....

i dont realy want to ave to take apart a trans...

i hardest car/truck thing iv done was my brother and I changed the gears and diff in this 94 Bronco (8.
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Old 05-19-2006, 01:39 AM   #27
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You don't even have to take the side cover off the trans to change the fdr to 3.06 or 3.33 for that metter.
All you need to do is change the diff and sun gear. Thats the difference. Not the chain and gears.
Here is a little more info from pontiac jeff on that:
http://60degreev6.com/discussion/kb....e=article&k=44
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Old 05-19-2006, 04:09 AM   #28
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Quote:
Originally Posted by 95naSTA
You don't even have to take the side cover off the trans to change the fdr to 3.06 or 3.33 for that metter.
All you need to do is change the diff and sun gear. Thats the difference. Not the chain and gears.
THAT is what I was looking for. This was my original conclusion, but I wanted some feedback from more experienced and knowledgable members to back up my research.

Now, the more important question: just how high of a gear ratio can I put in Maybe I can get good at it and swap between performance ratios and mileage-booster gears when needed
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Old 05-19-2006, 08:27 AM   #29
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Quote:
Originally Posted by CSFiend

Now, the more important question: just how high of a gear ratio can I put in Maybe I can get good at it and swap between performance ratios and mileage-booster gears when needed
you can swap in a 3.33 or a 3.43
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Old 05-20-2006, 12:11 AM   #30
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You can actually go up to a 3.73 FDR but 3.43s and 3.73s need a different set of chain and gears. So the only somewhat easy swaps are the 3.06 and 3.33.
But with a low end grunt engine like the L27, I would think the 3.06 would be optimal. Possibly the 3.33 but that may be pushing it.
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