[smasie13]

I have 120,000 on my K1500. The truck runs great and the transmission is fine except when I go highway speeds for an extended length of time. After I come off the highway I get a hard shift into 1st and 2nd gears. If I stop and turn the car off for 1 minute the problem is gone. Can anyone help me with this.
Thanks,

 

[unplugged]

How often do you service the transmission? Have you ever changed the fluid and filter? If its been awhile since you've done it, go ahead and dump a can of Sea Foam Trans Tune in it and then change the fluid and filter. It has saved me $$ and improved the way my tranny shifts.

SEA FOAM TRANS TUNE

Automatic Transmission and Power Steering Tune-Up Formula

* Cleans gum & varnish
* Smoothes rough and erratic shifting
* Maintains smooth operation
* Auto-transmission flush
* Power steering and rack and pinion flush
* Cleans and dries hydraulics

Works and Performs Instantly

* Conditioner that is not a stop leak
* Cleans sticky valve bodies and governors
* Use to flush power steering and rack and pinion units
* Safe, fast, and reliable

A 100% pure petroleum product. SEA FOAM TRANS TUNE is a conditioner that is not a stop leak and is entirely compatible with all automatic transmission, power steering and hydraulic units.