Tranny fluid foamy

[LwnmwnMan2]

I had the transmission fluid changed about a month - 6 weeks ago at a reputable shop that we've used for years.

First service at 60k miles. The fluid was still fairly pink, no metal shavings.

Now in first gear, the truck surges as though it's slipping. Not alot, it feels as though you had a 300 gallon tank in the back about 2/3 full.

I checked the fluid with the engine running and it was all bubbles, the fluid level was well over the max line.

Is the tranny overfilled, causing the surging/slipping?

[Scott K]

Yes, the tranny being over filled can cause all of them concerns, drain some out, to the correct level, and that should fix your problem.

[Scott K]

Actually, the tranny being over filled, is causing the foaming, and the foaming is causing the shift concerns. So in a round about way, it is shifting this way, because it is over filled. I wouldnt drive it to long with the shifting issue, as it might cause damage from slipping.

[LwnmwnMan2]

I talked to the Transmission shop. An employee (not the owner) said they always over fill them a bit.

I told him it's always the same whether the tranny is hot or cold, but now that I pay more attention, it's acting up more when it's cold, than hotl

He said the only solution is to drop the pan and see what's going on.

I'll make a call to the owner after lunch.

[Scott K]

Sounds like a dumb policy, to "always" over fill? Ya I would talk to the manager, or owner as well.

[jwhjr]

Over filling it as policy definitely doesn't sound right. If anything, I usually leave it a quart low and drive it up to temp and then adjust the level when hot to get the level most accurate. It's a lot easier to add fluid than to remove it to get the level right.

[fishing tech]

Foaming is ussaully a sign of over filling. Make sure that they didn't kink or pinch one of the cooler lines.