can anyone help me on figuring out why my truck shifts perfect until it gets into overdrive, then it starts shifting in and out of o.d. like its going into passing gear. i have replaced the speed sensor on the rear end housing, replaces the solenoid pack. also my speedo jumps everywhere at any speed. thanks for any help on this.

 

The speedo is probably the cause. You'll need to fix that.

 

have you inspected the tone ring on the rear end? i have seen 2 different trucks have tone ring problems which cause the vss to go haywire. worth lookin at at least

 

I am having this exact same problem on my brothers 96 f-450 he just did his brakes. What is the Tone ring?

 

The tone ring is in the rear end it's a ring that the speed sensor reads

 

Thanks for the quick reply Ill check that. Would it get desturbed doing the brakes? We had the axels out and both rotors and calipers took the bearings out and lubed them and cleaned them and put it all back together.

 

Duke, the speed sensor reads its information off of the tone ring in the rear end, I think thats the way it works.

Mike is to fast for me!