Transmission Fluid check
I have a 3500 chev van conversion with 8.1L engine. Do you checkthe transmission fluid level with engine on or off.transmission in park or in drive? firstname.lastname@example.org
I normally check the transmission fluid with the vehicle running but in park after going thru the shifting pattern.
Truck on level surface, up to operating temperature, in park, engine running, should be in the cross hatched area of the dipstick, looks red and not smelled burnt or brown.
I don't think you want to check the fluid in the Drive position !
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