Tranny slips after hard stop

[dfrelich]

I noticed that a few times last few months. After stopping hard, then stepping on gas, the tranny slips, then catches gear and surge ahead. It feels like whatever gear I was on before stopping. It starts on that same gear before it downshifts.

FYI -- The fluid looks good. The level looks normal. Someone says it's low on fluid but I see no leak.

Any guesses? I'm at 138k miles. The truck transitions through gears like silk at all other time.

 

[OregonLC]

Others with these symptoms were indeed because of low fluid sloshing to the front and starving the pump. Are you checking the fluid level with the engine hot and running, trans in Park?

 

[dfrelich]

Yes I check after driving and engines running. I think I will check again sometimes this weekend. It's my weekend truck. Will report back.

Others with these symptoms were indeed because of low fluid sloshing to the front and starving the pump. Are you checking the fluid level with the engine hot and running, trans in Park?

 

[2000UZJ]

I would put the transmission in 1st gear and try making it slip again. Does it feel like your starting in second and then it shifts down into first gear? I would manually shift it to try to cycle the shift solenoids faster and more aggressively. It may have buildup, or just sticking.

 

[dfrelich]

Turns out to be low fluid. I changed out fluid couple months ago. I must have miscounted somehow. Odd thing when hot, it sits between two notches on the stick. But when driving and then pull into the garage, it is low. I filled up with one quart and no slips after multiple hard stops. Now I know I need to check right after the drive.

 

[OregonLC]

Yes, the trans wants to be cycled through the gears - forward and reverse - before running engine will give a reliable reading on the stick.

 

[Rigger]

FWIW I've not ever experienced this with my Hundy, but my FJ62 used to do this when the tranny fluid level was too low.