| [GMCnet] Don't always wright off your trans as going bad. Or gone. [message #312525] |
Thu, 26 January 2017 13:02  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma:
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Senior Member |
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This is something that I've seen at times. And it happened to me back in Nov. Coming back from Chicago. I'd be going down an Interstate off ramp. And at about 35 MPH. The trans would disengage the engine. Thus the engine went to idle. Yes. This can be a sign of a full failure. But there are two things that can do this that can be fixed by anyone. Simply. There is a small steel vacuum line that goes from the front of the carb. To the right side of the trans. And has a small sections of rubber hose at each end. If there is a vacuum leak in this line. This is a sign. Next pull that rubber hose off the trans vacuum modulator. There shouldn't be any signs of trans fluid in that hose. That's another sign. Mine had neither sign. I spent $30 for a vacuum modulator. Changed the modulator. Fixed. If you do this. Have the new one ready to quikly stick in. As fluid will rapidly come out. Make sure the old O ring comes out with the old modulator.
Someone I know was on their way to Texas lately in their GMC. They were about 200 miles from home. When they decided to stop for the night. The next morning. The transmission wouldn't work. They put a can of TransX in the transmission. Started the engine. And moved the shifter lever from gear to gear. Stopped doing that. But let the engine continue to run. Then did this same process several more times. After about 45 minutes. The trans started to work again. I told them to fill up with gas. Drive 50 to 55 MPH home. And don't stop. I've done this with cars I've had. May not work every time. But this saved a big towing bill. As what do you have to loss at that point anyway. Remember. This DID NOT fix the trans. But DID get them home. Bob Dunahugh.
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