weird transmission question

[L36Pontiac]

do transmissions learning driving habits? reason i ask is that i think the previous owner of my car drove hard because when i get on it it shifts so smooth you cant feel it shift but when i drive normal 1st-2nd is kinda rough, its been that way since i bought it.

[tpulliam79]

my old 96 was kinda like that, I put in an adjustable trans modulator and it fixed it, they are only about 30 bucks and take all of 2 minutes to change. Just be sure that its not slipping or anything prior otherwise it will just mask the real issue,

[willwren]

99's don't use modulators.

[tpulliam79]

guess I should have read his sig first, my bad

[00Beast]

Idk, they kind of do "learn" driving habits, but not really. I think this sounds more like a goofy PCS. I suggest running a can of SeaFoam TransTune through the trans for 100 miles or so, doing a pan drop, filter and shift kit then buttoning it up and refilling with Vavoline Max-Life ATF.

[LeSabre in Buffalo]

Idk, they kind of do "learn" driving habits, but not really. I think this sounds more like a goofy PCS. I suggest running a can of SeaFoam TransTune through the trans for 100 miles or so, doing a pan drop, filter and shift kit then buttoning it up and refilling with Vavoline Max-Life ATF.

X2. Get a TransGo shift kit, and do a cooler-line flush to the MaxLife ATF. You'll need about 14 quarts. Doing that about eliminated my Buick's PCS problem.

[KL Mallender]

Other(more probable) possibilities are:
1, Broken 1-2 accumulator spring.
2, Worn accumulator piston/seals or guide shaft is leaking apply pressure.
good luck,

Kevin.

[LeSabre in Buffalo]

TransGo shift kit would fix #1, and a new gasket would fix #2. Or, get Intense's shift pak for fixing both.