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Old 04-21-2012, 04:34 PM   #1
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Gear Swap

I recently changed to 4.10 gears and installed a Truetrac in the rear... Now I have a happier drive train!

I read somewhere (I just wish that I could remember where!) that you should reset the adaptive memory after a performance upgrade. Does that apply to gear changes also? I don't have any codes, but the automatic transmission seems to be locking up way to early.

My speedo is still incorrect, but the new gear arrives on Tuesday. Will changing this input have the effect that I hope it will have on the shift points?

Thaks for any replies in advance

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Old 04-21-2012, 04:45 PM   #2
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The engine computer will eventually adapt to a change like that. But the engine computer will be a little confused on its RPMs vs. speed now which will be resolved by the new speedometer gear. Shift points won't change after the new speedometer gear is installed since the transmission shifts purely on hydraulic pressure, it gets no input on when to shift from the engine computer. That didn't start happening until 2003.

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Old 04-21-2012, 05:18 PM   #3
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Thanks for the reply... I just wanted to confirm my suspicions about the 3 speed It seems like I was over thinking the perceived problem!!!
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Old 04-21-2012, 06:01 PM   #4
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Originally Posted by Jerry Bransford View Post
The engine computer will eventually adapt to a change like that. But the engine computer will be a little confused on its RPMs vs. speed now which will be resolved by the new speedometer gear. Shift points won't change after the new speedometer gear is installed since the transmission shifts purely on hydraulic pressure, it gets no input on when to shift from the engine computer. That didn't start happening until 2003.
So its a good idea to do a reset in 04-06 models after an upgrade like this? I thought about it, but wasn't sure....
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Old 04-21-2012, 06:03 PM   #5
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So its a good idea to do a reset in 04-06 models after an upgrade like this?
I personally wouldn't bother, the computer is smart enough to eventually figure such things out on its own.
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