tranny problems or not?????

Chythar said:

So you've got an automatic tranny. Installing new gears will throw off the shift points in the computer so the tranny will shift at the wrong times - usually later than it should.

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My experience was sooner as at any given engine rpm you are going slower with the taller gears (4:10's). True the speedo will be reading higher unless he has installed an electronc device to correct the speedo.

As for the V6 tach, if you're still using the V6 instrument cluster the gauges aren't reading right. I doubt you're actually getting a shift at 7000, probably around 5000 and change RPM.

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5000 and change is where the PCM will force the shift at WOT and if held in first through 3rd at 5350.

+1 on the tach being wrong if it was a v6 prior to.

wheelyman19 said:

Thanks for the info. But how do i change the shift points, if thats what the problem is

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You can't unless you are adding a tuning device to alter the PCM values. From what you have been describing isn't a shift point issue other than the fact that under light acceleration the shifts will occur a little earlier (speedometer wise)than they did with the stock gears. Your problem appears to be related to the wrong cluster being installed ie. one from a V6 and having incorrect tach readings. In one of your posts you mentioned that even when you took your foot off the throttle it still shifted as if it were under power. This could only happen if the throttle valve was sticking in the WOT position. If this is what really happened then that is an entirely another issue with a different solution.