47rh won't lock up above 1800 rpm...

[Larue]

Did 47rh swap almost a year ago. Works great very happy over all... I do believe it is a factory rebuild on the trans, But i've noticed that no matter what I do the TQ seems to "unlock" around 1800 rpm? I've been kinda stumped on it to be honest. It holds great at any rpm below that. But cruising at 65-70mph (2krpm) there is no difference in locked and un locked, also if i roll into the throttle there is no change between having it locked and unlocked... Is this normal for them or am i missing something? I was rather excited that my mileage would go up with a lock up trans, but in fact that is not the case. I have done quite a bit of searching, but haven't found anything pertaining to this issue. (could be me, my Google skills seem to be lacking lately)



Thanks,
Don

[Larue]

more info....
trans won't lock above 1800rpm in any gear, any load, any amount of throttle.... I don't know of any circumstance that it has been locked above 1800 rpm... Leaning towards VB issue. May try to find one to swap out and see what i find...

[ellis93]

Sorry I have no idea on what it is. kinda sounds like a pressure issue.