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3 Speed Tranny Replacement issues

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Offline TrickTrax

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3 Speed Tranny Replacement issues
« on: March 13, 2010, 04:37:31 PM »
Okay call, me cheap. I purchased a 3 speed auto out of a 95 tracker to go into my 90 due to slipping between 2nd & 3rd. I grew to have an extreme dislike for automatics when doing the swap, what a pain in the A^&! Anyway I got the new/used tranny in. Now it won't shift out of first. I have checked the modulator, and vacuum lines, all electrical, vacuum and other connections are fine. I am thinking it may be a stuck valve as I am not sure how long the new/used tranny had been sitting.

In looking at the vacuum connection at the intake manifold there is only a pin small pin hole. Are the vacuum requirements for a 95 different from a 90? I checked the modulator on the new tranny, seems to be fine. I don't show any vacuum at the modulator though. When I put my finger over the connection on the intake manifold I can feel a little vacuum. The modulator from my 90 appears to be a little different form the 95. My goal was to rebuild my old tranny, then pull the motor rebuild it and put them back in together. I was hoping to be able to drive it while I worked on the old tranny, but now looks like I am hosed. Is there anyway to unstick a valve in the tranny short of pulling it apart? Could it be an issue with the torque converter? Any input would be greatly appreciated.
Randy Sherping
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Offline wildgoody

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Re: 3 Speed Tranny Replacement issues
« Reply #1 on: March 13, 2010, 05:17:42 PM »
The problems you have are both the same, stuck/sticky valve body,
both the trannys sound like they have the same problem, drop the
pan and clean the valve body, should do wonders.

Also, is the new trans a 3 speed? not a 4 speed OD model ?
All the 3 speeds are made by GM and have a GM tag on the
left side of the housing, the 4 speeds are made by
Toyota/Aisin-Warner and require a computer to work

Wild
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