Question about Cars & Trucks
Posted by Anonymous on
Hello Lowkey, If your transmission has a vacuum shift modulator , you could have a bad modulator, a leak in a vacuum hose, a severely clogged air filter, or incorrect engine timing.
Posted on Mar 28, 2015
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Posted on Jan 02, 2017
Well, I should be asking for more information, but since I am now on my 5th, yeah, 5th transmission in my 95 1500 Ram I have come to learn a little bit about them. Chrysler had a bad problem with their trannies in the 94's & 95's. They then made a change in 96, but that didn't solve the problem. So here goes my attempt to help you out.
Have you checked you tranny fluid level? Very important. A transmission kind of works under the same principal as a jet boat. Meaning, it pumps the fluid through the transmission much the same way a jet boat pumps water through it to move the boat, but in this case the fluid power is directed through several lines causing the gears to move. You switch gears when there is a certian amount of pressure on the modulator to divert the fluid to another area.
Long story short: Check your fluid, not only the level BUT the fluid. Are you seeing any metal in it? Dodge had a problem with the webbing of their torque converters flaking off, causing transmission cooliant lines to plug up. This same metal chips, shavings, etc. were damaging the face of the clutches, and plugging up modulators. Check your fluid. I would probably say change your fluid and transmission filter. It's not that big of a job if you have a place you can work on your vehicle. Be careful when putting you transmission pan back on. Make sure you tighten the bolts in a crosswise manner, and tighten them snug, BUT not over tight. That will cause leaks.
Another point I will make. Check for vacuum leaks, this could very well be your culprit too.
I'd start with that first.
Good luck, let us know how you come out.
Posted on Mar 11, 2009
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Check the fluid level. You may want to consider having the transmission flushed. (I recommend BG Products flush system.) Properly flushing the trans removes any varnish the may have built up causing erratic behavior.
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