97 grand am 4T40-E

i have a modified 97 grand am 2.4L twin cam witht he automatic trans. sitting at bit over 123,000 miles. it still works fine, but i can tell its going, so i plan on getting it rebuilt (maybe) with tax money.

after said rebuild, i want to try to get into tuning the trans more. mainly the shift pressure.

on my HPT, under trans> shift pressure, the tables are all set to zero. would increasing those do the trick?

or, would i have to go under General>Force Motor Current> positive/negative?

*edit* and, whats the difference between the pos and neg current on the FMC?

Since your transmission has a vacuum modulator, the shift pressure tables aren't used.

Only way to firm up the shifts is a shift kit.

Russ Kemp

Quote:

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Originally Posted by Russ K

Since your transmission has a vacuum modulator, the shift pressure tables aren't used.

Only way to firm up the shifts is a shift kit.

Russ Kemp

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It is electronically controlled on that car.

Do not touch the force motor current. You want to change the shift speed and pressure, but leave the max at 90psi. If I get time I can post some screen shots to help you out.

John aka JMHZ2401 has a modest trans tune that I sent him, and is working well on his buddies 99 supercharged Z24.

What mods do you have done?

Just realized this is a year old.