1994 Plymouth Voyager Engine Over-Revving to Move van

Tiny
KENCL
  • MEMBER
  • 1994 PLYMOUTH VOYAGER
  • 130,000 MILES
I have to over rev the engine to get the van to move. After that it seems to shift fine. Tranny fluid level is OK, and it does not smell burnt. After I over rev the engine to get moving, the engine revs seem to get back into sync for the speed I'm doing - usually just as the van starts moving, the over-revving is no longer there.
Any help would be appreciated.
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Sunday, August 11th, 2013 AT 11:35 AM

3 Replies

Tiny
DRCRANKNWRENCH
  • EXPERT
It sounds like the torque converter or torque converter solenoid is bad. Automatic transmissions are quite complicated and tough to diagnose. So, I strongly recommend that you take it to a transmission repair facility as opposed to a regular repair shop. It takes special expertise and tools to diagnose and repair automatic transmissions. Try not to go to AAMCO as they are overpriced. Use the search engine on this site to find a transmission repair shop near you.
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Sunday, August 11th, 2013 AT 9:00 PM
Tiny
KENCL
  • MEMBER
Thanks for the reply.
I did a transmission flush of the fluid and changed the tranny filter. Driving has improved, but most times when I move off from a dead stop, I can still hear the engine over-revving.

Actually what's happening is the vehicle is moving off in second gear. After starting to move (and I hear the over revv), if I floor the accelerator, the tranny will shift into first gear, then all of the gear shifts going up are normal.

When slowing down, I can hear the 3-2 down shift, but I cannot tell if it makes the 2-1 down shift. If I come to a full stop, and try to move again, I can tell I am moving off in second gear, and have to go through the "floor the accelerator" routine to get into first gear.

At a stop, with the tranny in "Drive", if I shift to "1" there is no indication of the tranny shifting into first.
Can this problem be caused by a bad solenoid? I have the 3 speed A670 tranny.

He says he had second gear starts, and solved it by installing a Sonnax governor spring. I'm willing to try that, so if you can give me some guidance, it would be greatly appreciated.
Thanks again.
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Saturday, August 24th, 2013 AT 2:32 AM
Tiny
DRCRANKNWRENCH
  • EXPERT
I believe it could be a bad solenoid. I don't have time to look right now but I am guessing the governor spring is in the valve body. The other possibility I was thinking about is a clogged port in the valve body. If you have found something that is a spring that goes into the valve body, I think it is worth a try as some models of vehicles have problems unique to them. One thing though, when taking apart a valve body make sure that you don't release a detent, which is a ball and spring, because they will go shooting out and you will never find them as they are so small. Then the adjustment at which they were set is lost.
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Thursday, August 29th, 2013 AT 6:41 PM

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