Question about 1994 Volvo 940

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1994 940 SE automatic Not down shifting

I have a 1994 940 SE wagon that is not down shifting to the lower gears in speeds above 40mph once getting to a cruising speed. I had all of the cables and electronics checked and adjusted, old pressure test passed. No oil leaks.
It works sometimes this issue is on and off. thanks

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  • anim8or3dguy Jun 03, 2009

    Ok so your saying it could be a vacuum leak.
    Would a vacuum leak stop it from going in to OD or fourth gear!
    How much would a transmission flush? FYI I live in BFE South Dakota. "They anit ever worked on a Volver before! Ding dang Dittly!" Is is what I'm going to get form any shop here in SD!
    what type or gage of vacuum line do I need to get?



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First and formost I realy think you have a vacume leak. I would start replacing all the small vacume lines instead of checking everyone of them. Its quicker and not very expensive. After that I would also check your trans filter. If you go to AAMCO they have a program that will power flush the trans and filter and every year after that they will change the fluid for free. The other thing that could be causing the problem, is the bands in your trnas just need to be adjusted. When you remove the filter there are some bolts that need to be properly adjusted, you need to find out the correct settings and not just nilly willy do this. but the three things I have told you to do will most likely fix the problem. If they don't you have a larger problem and need to take it in for a real inspection. Trans are not easy to work on at all.

Posted on May 31, 2009

  • James Tepfenhart
    James Tepfenhart Jun 04, 2009

    Yes, a vacume leak can cause a whole gambit of problems. I would check out the vacume lines and buy similar, as long as they are heat resistant you should be good. don't forget that old torque converter. That ****** can cause many problems. I live in Delaware so I can only give you the price they quoted me, around $120.00 If you go to a AAMCO they should be able to handle a power flush. Its prety much the same job on any automatic trans. Let me know how it goes and if I can help any more.

    My special note is that I don't work on transmissions. If I have a problem depending on what needs to be done. I either replace it with a warrantied used one or have it fixed. They are mean cruel creatures that hate to be touched by anyone other than a trained transmission mechanic.

    Good luck




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