Originally Posted by Ray,IN
I would start with a complete AT oil and filters change (including torque converter), inspect for metal fragments/dust in pan bottom while performing this. A light film on pan bottom is OK, depending on mileage, low miles-none should be seen. Larger fragments might indicate $$$$ problems.
good advice BUT get a can of trans flush B&G or equive,, put in and run it a while, warm up good, run thru gears a little,, then dump it all..
Is it a C6 or E40D, ?
My E40D when it sits for 3-4 months over winter has some jet lap upon forst moving if not warmed up 100% then it is fine all year, 193K and still motorin..
My other RV has 35K on it same trans, does the same..
I change fluid in pan every season, that is about 1/3 of capacity, I do a complete dump and flush every 50K and do yearly mini changes..