Questions about later transmissions...
Guys, I have driven my ride for the last month, and have some questions that I hope someone knows the answers to...
My 02 GM tranny is working great, but I've noticed some issues, and wonder if a tune will fix them, or if I may eventually have problems...
Shifting is usually great, especially if I'm driving normally, i.e. accelerating hard, high speed (interstate) or on/off ramps.
If I'm driving gently, mom in car, GF, boss, etc. with me, then I get a strange 3-4 shift.
It is almost as if it is in neutral for a second, before it decides to shift.
If I pop into the throttle, it doesn't act like a neutral drop, it just seems to not have the converter locked, and will shift, then lock.
Could this have to do with the 3.08 diff, (from 3.27 stock), and smaller tires (235-60/15s) throwing off the speed sensors, and be correctable by a tune?
Or am I just hallucinating, wanting to do more to my car...
BTW, is manual shifting as bad for an 02 transmission?
what about WOT 3-4 shifts?
WOT 4-3 shifts?
WOT 4-2 shifts? (still break things, or did they fix that?)
This swap is well worth the effort; my 200k mi+ motor is still a beast...now that she has some legs under her...
EDIT: This is due to changes in the Valve body to try to reduce the problems with the 3-4 WOT shift; it isn't a problem.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
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Last edited by Grog6; 02-27-2008 at 10:59 AM.
Reason: more info