A4LD question, fluid level? Clogged?

[lost86broncoii]

Hey guys, I picked up an 89 Bronco II with a "bad" automatic in it. I was told it would need to be trailer cause once the transmission heated up it would lose 3 and reverse. When I test drove it, it did lose reverse for a minute. Had to sit and move the shifter around for a minute or two before it finally clicked into place.

Well I had to drive it home and after 45 minutes on the road I stopped to see if the transmission was heating up and losing reverse. I didn't have reverse. Drove it to the park where I wouldn't have to reverse and let it cool down for two hours then reverse worked again.

Next day I go to Tacoma, from Seattle, took the back roads for the most part and drove for about 45-hour again. This time reverse worked and hasn't stopped working since, in fact the truck runs fine now...

I checked the fluid it looks clean, maybe a little high, kind of hard to get a clean reading on my dipstick. So my question is...

Could it have to much fluid in it and once it heats up the pressure? is to much and it loses reverse? Could it just be the fluid level causing problems once it was up to temp? I haven't drained any out or touch any thing yet so I am not sure why it fixed itself. Maybe a valve in it was clogged or stuck or something, I am not a transmission guy at all, I hate these auto's but if she'll hold together till I can save up to do the M5OD I would be a happy camper.

I love my new old Bronco II, but sorry I can't post any pictures my camera is in Scotland with my sister.

 

[adsm08]

Too much fluid in an auto causes low pressure because the fluid cavitates. If the fluid is high I would correct that first.