OverDrive

[mav6759]

I replaced my transmission this weekend, I was having some problems out of the trans changing gears. I thought it was the type of fluid that I put in the trans, but what I found out was, my OverDrive is stuck to the on position and won't turn off. Which is causing my RPM's to go up, and put more stress on the motor. I traveling from NC to VA. My question is. is there anyway I can disconnect to overdrive. And does anyone know why the overdrive would be stuck on. I have no light on dash, but when I hit the overdrive button, the light comes on, but nothing happens.

 

[IZwack]

I think what you mean to say is that the overdrive is stuck "off" - which causes higher RPMs. Overdrive is when the input to output ratio is less than 1.0 - in a typical vehicle, I think this ratio comes out to 0.75 which means for every 0.75 turn of the engine, the transmission's output shaft is rotating once.

 

[mav6759]

Yes, thank you. Is there anyway to diconnect the overdrive. so that i won't have the RPM problem.

 

[BrooklynBay]

Which engine/transmission do you have? You don't have any vehicle listed in your profile. Your overdrive servo could be bad or the band might be out of adjustment.

 

[mav6759]

I have the V6 4.0 1996

 

[BrooklynBay]

You have a 4R55E transmission.

 

[mav6759]

Does anyone know what the speed senor does on this truck. and does it effect how the over drive work.

 

[mav6759]

I believe the overdrive is stuck in the off position, what can cause this, is this a simple fix.