hard jump from 1st to 2nd gear

[chevysbetter]

Hey guys, I need help. I dont know if this exact question has been posted before or what. I tried looking for it, but anyway - After driving on the interstate for a while or after a long drive, my car will jump really hard from 1st to 2nd gear. Not in any other gear - just from 1st to 2nd. It is so bad that I actually move in my seat when it happens. If i stop for a while and let my car idle it wont do it anymore. It hasnt done it in a really long time.Is it overheating? Is this going to cause further damage? WHATS HAPPENING?

[Ian]

more gas, less clutch.

[silvachris1]

Is it an automatic? If so, you didn't search very good. There should be ton of threads on this man with a wealth of information. My guess is that it's the notorious 4L60E tranny problem, where you can hear a whine from under the car, and the shifts slam you back hard. I you tap the gas in 2nd, you can hear the tranny catch up with the driveshaft, like a clunk. Do you have a SES light on? Scan it and see if you get the P1870 code. Drivetrain component slipping. If thats the case, you'll either need a new valve body, or a kit from some company called sonnix or sonnex. Something like that. Search a little bit more man, I've just grown to live with it when mine does it.