Changed trans fluid in my TH400 and now it wants to slip and not get into gear. - The 1947 - Present Chevrolet & GMC Truck Message Board Network



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Changed trans fluid in my TH400 and now it wants to slip and not get into gear.

03-26-2026, 07:40 PM

#37

Shifty One

Registered User

Join Date: Dec 2014

Location: Tucson, AZ

Posts: 972

Re: Changed trans fluid in my TH400 and now it wants to slip and not get into gear.

Quote:

Originally Posted by Rust_never_sleeps

If it's too full, wouldn't it foam out the vent?

It might if being driven. I'm just throwing theories here....

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