I have a 1996 Pontiac Firebird Formula TA with a 5.7L Automatic Transmission.
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What is your question?
I was told later that this 3.73 posi-track 3rd member has 7 splines and my original 3.23 had 11 splines.
It has obviously affected the speedometer. Has that also affected the transmission?
My transmission is a 4L60-E with a street/strip torque convertor.
I really like the lower to mid range increased acceleration, but I sure do miss the higher speed without the overdrive. Any suggestions? Other than that everything mechanical on the car works great and no check engine lights. I just had it inspected yesterday.
What makes this problem better or worse?
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How long has your 1996 Pontiac Firebird had this problem?
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If you went to a numercially higher gear ratio and did not change account for it in a tune, your speedo will not read correctly. This will also change your transmission shift points. On the 4l60e there are 2 prerequisites needed for a shift, rpm and mph. Since you have changed the way your car reads mph by changing you gears, your shift will not be on time.
Good new here is that this can be easily fixed with a tune. Call your local speed shop. if they have hptuners or any software for gm computers they can make a quick change in the computer telling it what gear you have.
Alex
