5R55E Overdrive won't engage?

[taylorscj]

So here's the deal. My '97 Sport makes a 'grinding' sound when it tries to shift into overdrive. It can be at 35 mph or 60 mph no difference. Once it starts the grinding sound it acts like it's in neutral. I slow it down to under 30 and the grinding sound stops and the tranny works fine until it tries to shift into OD again.

Any thoughts?

 

[TPLYNCH]

The OD band is probably shot... Hve you checked fluid level and condition?

 

[cjbarron5]

well................sounds like the band is either out of adjustment and/or the od drum is shot there is a peice that mates with the "back" of the od drum that looks like a throwing star kind of and when it starts "missing" the drum it will grind the a4ld had this problem for the longest time in fact that was the major start of failures in the a4ld but with out a tear down you wont know for sure how much damage is done