Check the temp of the trans fluid when it does that. An infrared temp gun would be helpful, just shoot the bottom of the trans pan. A lot of times when you have hard shifting its tied to a bad TPS or a short in the TB harness at the TB.
Check the temp of the trans fluid when it does that. An infrared temp gun would be helpful, just shoot the bottom of the trans pan. A lot of times when you have hard shifting its tied to a bad TPS or a short in the TB harness at the TB.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709