Question about 1995 GMC Sierra C1500
Is this a front seal or rear?
If it is the front seal you would have to drop the transmission out to replace. Once down and out you can use a small flat head screw driver to get the old one out and then dry it up as good as you can. Place the new seal in place and then tap around it in a clock wise circle until it is all seated. If it is the rear seal you can just drop the drive shaft and then same as the front. Take a small flat head screw driver and remove the old one and then dry it off and clean it as clean as possible. Place the new one in place and press it in as far as you can. Once it is in as far as you can push it then take a small hammer and tap it clock wise until it all the way seated. When pushing it with your fingers make sure that it stays straight or it will leak as well as the old one !
Posted on Nov 17, 2014
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Posted on Jan 02, 2017
I had the exactly the same problem, in overdrive my truck would start to shake, in 3rd it would instantly go away, i assumed it was the flywheel to, THIS IS NOT THE PROBLEM, your tranny is in good shape and flywheel are in good shape, I had the "Idle Motor" replaced is what my mechanic called it, this completely fixed my problem, also my fuel milage went up considerably after having this replaced, hopefully this will help you out
Posted on Mar 11, 2009
The front seal could be replaced, and not have a problem. If you have a shop other than a transmission shop do the repairs, make sure the torque converter hub is inspected to make certain its not scratched/scorn. If the trans shifts properly and the fluid is not burned or smells burned, this would be an easy repair. If the trans fluid smells burned, and hasn't been serviced regularly, the rebuild would be the way to go. Also, ask what the warranty for any and all repair are on your vehicle. Normal warranty is 1yr, 12.000 miles in the automotive business.
Posted on Jan 07, 2010
If you have never done this before,it may be best to take the truck to a shop or have some one with experience help you. You will need the truck up far enough to take out the transmission. The linkage and drive shaft has to be removed,then unbolt the transmission from the bell housing.Special tools may be needed to pull and replace the seal.
Transmission fluid needs to be changed since it is a brownish color.
Posted on Feb 16, 2010
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