Question about 1988 Cadillac Sedan DeVille

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I have a 1988 Caddy deville 4.5, put a used trans in because the other had started to slip, now after driving with this one for about 3 months and now it sounds as if it's now starting to slip. When I take off at a low speed, no vibration, when I take off at semi high speed, no vibration but it seems like while driving and I have to ease off the gas then back down again, then I get vibration. If I thrust the gas then it seems to engage but if I slowly excelerate it vibrates. I was thinking maybe a weak vacuum my not be pushing the trans to engage? Please help

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I really recommend a trans service/ band adjustment to correct your problem before you go thru another trans, almost sounds like a problem with torque converter being out of balance/ damaged...

Posted on Oct 01, 2010

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Posted on Jan 02, 2017

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