I have a 06 chev truck that is surging when truck in in over drive between 40 and 55. it dose not do it when you take it out of overdrive.. Truck has about 110,000 miles on it. Anyone know what the problem might be...Thanks Martin

 

I would suggest working with your dealership to get this issue figured out. They would be the most knowlegeable on this issue. They would be able to diagnose your problems and give you a fix for your vehicle. I hope that helps.

Jeff Morris, Chevrolet Customer Service

 

Dont have the money for that need, to work this out with maybe a little help for a mechanic from chey or one that can help. Im sure this is not the first time this has happened and some one may know the cause. Thanks for any and all help. Martin

 

Check engine light on? Only doing it in overdrive, makes me think trans prob, but that doesn't seem right. Could be a sesnor having to do with the Torgue converter. How many RPMs does it seem to surge?

 

No engine lights on. And surges maybe a couple hundred rpm's. It is a 5.3 litre. And it only does it in overdrive. But drives me crazy!!!!!

 

That sounds like the Torque Converter. When the TC locks or unlocks, I'm not 100% on the theory of operation but I have an idea, the engine drops 2-400RPMS, or rises 2-400RPMs. With it being an '06, I think it could be a sensor. I'm not sure which one works the TC. Someone else will chime in on this I'm sure.

 

Does anyone know how many sensors there could be or which one too start with. Thanks for all and any help, Martin

 

well thanks anyway

 

Possible a Torque Converter Clutch Solenoid, but I'm not sure what all characterics they show when failing. I know can be the cause of a torque converter not locking at all.