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MARK_VANDERBENT's avatar
MARK_VANDERBENT
Explorer
Apr 03, 2018

Trans fluid change on my 2007 suburban with 320,000 miles.

I bought a high mile suburban and the as far as I know it's the original trans, and I have no idea when the fluid was changed last. It is pretty dark but not burned. The truck shifts perfect and shows...
Tow Vehicles
carringb's avatar
carringb
Explorer
Apr 03, 2018
I agree with avoiding a pressure flush.

You should drain and re-fill. Sometimes this can dislodge sludge or debris, causing near-immediate failure. If this happens, keep in mind it only accelerated the inevitable. Better find out before a long trip.

FWIW - I've gone to 100,000 drain and fills on my transmission. I'm a little over 450,000 and I'm a little over my 100,000 interval now. I just run the Napa stuff meeting factory spec.

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