Axle/diff Question??
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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.
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Originally Posted by jr's3800
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.
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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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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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From: NEBF:06,07 | NYBF:06,07 | ONBF:06,07 | CNBF:06 & more............
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.
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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From: Philly
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
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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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.
All you need to do is change the diff and sun gear. Thats the difference. Not the chain and gears.
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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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
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From: Philly
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.
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.