1996 Dodge Ram - Trans problems?

[Mopar1973Man 3,653]

Hey gang... Reference - http://forum.mopar1973man.com/showthread.php/2123-Mopar1973Man-1996-Dodge-Ram Ok Mom's 96 trans is acting rather goofy. ATF fluid is clean, don't smell burnt, and it full... But if I to set the cruise at 65 MPH and cruise home up the canyon hit a small hill and it shift out of 4th to 3rd pulls over the hill and then stay in 3rd. But if I give more throttle so it coast for just a second it lock up into 4th no problem. This is rather annoying and I would like to fix this little problem. Any help out there?

[flagmanruss 80]

I think you mean stays in 3rd. I don't know if it is broke or not as gearing is different than mine 4:10s. With slight changes in throttle I often manipulate gear. I take it this was not like this before?

[Mopar1973Man 3,653]

It goes into all gears but if there is a slight hill it will drop lock up shift back to 3rd pull the grade and then hold 3rd and unlocked for a very long time sometimes for 4-5 miles before shifting back to 4th gear and lock up. I was hoping to see one of the trans gurus come on and give me a hand with this. I know its the same type of trans as the diesel just married to a V8 gasser... I'll grab my video camera and shoot a vid of this...