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Old 12-17-2005, 09:55 PM
Brian Carlton Brian Carlton is offline
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Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Firstly, I would suggest to you that the vacuum to the transmission is the least of your concerns right now. It affects the quality of the shift but does not affect the timing of the shift or anything else regarding the performance of the transmission. If you must check it, you must do it with a T in the line and route the guage into the cockpit to read it while driving. You can't simulate a situation with maximum power in the driveway.

The greater concern is why the vehicle won't develop enough power to get out of third gear. If I'm reading the post correctly, it won't shift to fourth due to insufficient power?

This needs to be addressed by looking at the basics of valve timing, chain stretch, and injection timing. Something is seriously amiss and it's not likely transmission related.
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