zf problem please help

[ryan324]

hey guys new to the forum, i just did the zf5 swap from e40d in my 95 f250, only problem is it jumps out of 4th when i let off the go pedal....any ideas of what could be wrong?

[Nitro41]

hows the fluid level?

[ryan324]

its 1qt over full fresh royal purple atf

[ryan324]

well figured out something strange this morning, when the transmission is cold it shifts perfect, doesnt jump out of gear, but once its warmed up it does

[dr.deere]

hey ryan did you figure out was wrong my 94 is doing the same thing. and i just had the trans rebuilt looking for ideas.

[late_99_PSD]

Probably the detent for that gear is getting worn.

[rolsmojave3]

Detent, sliding collar damage?