Slipping Automatic Transmission

96 GMC K1500 4WD

A slipping automatic transmission is the first sign of serious internal troubles heading your way. More often then not this condition will lead to a complete transmission overhaul. Here is an email question about this common condition as well as a good example of the likely symptoms.

A visitor writes, Thank you for your website. You have pushed me to further educate myself about the mechanical side of cars. Here is some information about my trucks problem before I take it to a transmission shop or general car repair place.

I have a 96 GMC K1500 4WD. I am having slipping automatic transmission problems.  If I drive like grandma and ease up to Highway speeds I can feel all gears engage and pull, 1, 2, 3, and 4. If I take off fast From a stop or if I’m driving 6Omph and stomp it for passing gear I can see the Rpm gauge surge to 3500-4000 and hear the engine running great but no power at The wheels.

I have to let off the gas for the transmission to begin to pull again as it falls back to the higher gear. My auto scan tool from Actron says I have no codes set in the computer. I have purchased the all data online auto repair manuals for my trucks.  I have gone through the related info to become familiar as possible with this problem. After a physical inspection, my fluid level is correct and no burnt odor. I have no leaks, the wiring harnesses and connectors look fine. Read more