Transmission flush
#2
#3
May I ask, why do you think you need a flush? How many miles are on the truck? Your service interval whether towing or not is actually good for 150K......according to the owners guide.
The six speed is using MERCON LV which is a lifetime fluid.
It's best to have it flushed by the dealer or a transmission shop that you trust. That way the torque converter will be flushed as well and the exact amount of fluid that came out will go back in.
#4
the 6r80 has an internal thermostat that only circulates fluid to the coolers after a certain temperature has been reached.
a conventional flush machine found at most shops will not work.
you will need to have it done by a shop that can circulate heated fluid in order for the flush to be successful. The dealership may be your best bet in this case.
A DIY option is to drain and refill the pan, run it up to temp for a while, then drain and refill the pan again. the pan on this trans actually holds more than the torque converter, so draining and refilling twice will get most of it exchanged.
Also curious why you think you need the fluid exchange.
you can't go by fluid color with Mercon LV. it turns dark very quickly in its lifecycle. color is NOT a good indication of fluid condition as was the case with older fluids.
Might be worth your time to sample it and have it analyzed to check fluid condition.
a conventional flush machine found at most shops will not work.
you will need to have it done by a shop that can circulate heated fluid in order for the flush to be successful. The dealership may be your best bet in this case.
A DIY option is to drain and refill the pan, run it up to temp for a while, then drain and refill the pan again. the pan on this trans actually holds more than the torque converter, so draining and refilling twice will get most of it exchanged.
Also curious why you think you need the fluid exchange.
you can't go by fluid color with Mercon LV. it turns dark very quickly in its lifecycle. color is NOT a good indication of fluid condition as was the case with older fluids.
Might be worth your time to sample it and have it analyzed to check fluid condition.
#5
Well I am about to have 100,000 miles on it and I was changing my engine oil and noticed some of my transmission pan bolts were loose and it had leaked some fluid out and there is no easy way to check fluid level on this model (no dip stick) crappy design so I thought I would flush and change filter? It seems all the advise is to take to a shop that I trust so I guess I will do that.
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