How did I get 3.96 gears?? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-24-2007, 07:47 PM   #11
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Quote:
Originally Posted by TheDude
Do the T/C lock in 3rd? Because sometimes (notice it more when the tranny is cold) the RPMs will drop at 60mph from 3000 to 2100. Like its shifting another gear or the TC clutch engaged. I have a new torque converter and that Transgo Jr kit installed if that would make any difference. Is there any kind of anjustment that needs to be made after the trans is installed? Something I am missing here?
Yep it does lock up in 3rd.
It goes 1st -> 2nd -> 3rd -> 3rd with lock up -> 4th with lock up.

The transgo kit has options to firm up torque converter lock up.. and there are different options depending on if you have a converter with a woven carbon lining or not. That seems only to apply to 96-98 4t60-e converters though.

Just as long as you have the correct converter for what was done while installing the transgo kit, you should be good to go... Unless you have a looser converter than what you started with.. Lock up is typically raised when installing these so the computer dosen't see too much slip in lower rpms.

More than anything else, I think you need to resolve your FDR issue...
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Old 12-24-2007, 07:52 PM   #12
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Quote:
Originally Posted by TheDude
Do the T/C lock in 3rd? Because sometimes (notice it more when the tranny is cold) the RPMs will drop at 60mph from 3000 to 2100. Like its shifting another gear or the TC clutch engaged. I have a new torque converter and that Transgo Jr kit installed if that would make any difference. Is there any kind of anjustment that needs to be made after the trans is installed? Something I am missing here?
2100 Seems like 4th to me with the 3.29 Ratio... How far off is the Tach on your car? Could 2100 actually be 1900? If that was the case then I'd say you have OD..

And yes the TCC will lock in 3rd and 4th gears


And I agree with Mike... Need to have the FDR issue resolved..

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Old 12-24-2007, 07:56 PM   #13
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It is a OEM 1895 stall converter. I made sure of that. I also emailed Sinister Performance to see if they can help me with a custom chip. I hope its a simple fix like that. I really dont want to take the tranny back out. I spent over $100 in fluid alone!!!
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Old 12-24-2007, 07:57 PM   #14
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I think the Shift tables and the like need to be modified as well as the calibration for the gear ratio..

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