I have read alot on here about 3 to 4 and 4 to 3 issues but haven't been able to find one similar to mine.

Hoping someone can help!

My truck runs great and shifts smooth through all gears but......

When I start my truck after it has sat overnight, it will shift great (including overdrive) whether I drive if 5 miles or 100 miles. The button on the dash will operate perfectly during this time.

It will go into and out of OD without any issues during this time.

Once I shut the truck off, if I restart it (either right away or after say a half hour) it will no longer shift into overdrive and the light on the dash switch will not come on if I press it to disengage the OD.

The next morning if I start it up it will work perfectly for the initial drive and then not work if I restart.

I can repeat this isssue exactly every time I use the truck.

I have good clean fluid and it is at the correct level. I have no other issues with the running of the truck.

The truck has a new TPS as it was stalling at idle (the new TPS fixed the idle issue. This OD issue existed before and after the new TPS).

The service engine light is not on and there are no codes shown doing the on/off/on/off/on check.

Any thoughts on where to look would be appriciated

Thanks,

Art

 

I read that the speed sensor on the transmission could cause this. Does this sound like a possibility?

Any assistance would be appriciated.

Thanks,

Art

 

Are there any transmission guru's out there that might have any ideas to help me out?

Thanks,

Art

 

Can any one help me?