Join Date: Jul 2004
Location: Brantford, Ontario, Canada
Rep Power: 0
I think you may need some special tools to get it apart, but i might be wrong. I know we have a crapload of specialty tools at the shop that are designed for specific jobs - like removing or installing one specific part in a tranny.
FWIW, it doesn't sound like a cracked forward clutch piston. The old trannies used to have that problem when the piston was made of aluminum, but is has been changed to steel to prevent it. Furthermore, the cracked piston caused the tranny to act as if it was in neutral at stops - you'd hit the gas, the engine would rev up, and eventually, if you were lucky, it would suddenly slam into gear and away you'd go. You could sometimes prevent this from happening by driving with both feet - hold the brake with one, and keep the revs up off idle with the other - that would sometimes prevent the fluid from leaking thru the crack in the piston and keep it engaged.
Anyway, your problem is a harsh 1-2 shift, not a lack of initial engagement, so i doubt it's the piston. It could be a sticking accumulator piston or broken accumulator spring, or a valve body issue. I currently am having a similar issue on my car. The 1-2 shift is too firm, and the tranny guy can't figure out why. I've replace the valve body, which fixed 2 other problems, but not the harsh shift. It did fix an issue i was having with a flare-up after the 1-2 shift when the tranny was hot - basically, after the shift, the trans would seem to go into neutral, the engine rpms would flare up, then it would go back into gear and continue on its way. This sounds kinda like what's happening to you. I had 2 different tranny techs look at my valve body, and neither could see an obvious problem. We put a used valve body on, and it's fixed, so obviously the problem was in the valve body, but not something that could be easily seen by a visual inspection. I know your tranny guy says he tried 2 valve bodies, but maybe he's just telling you that. Or, he did, and the problem is somewhere else. Just some food for thought for you.
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