Just picked up a complete, brand new OEM tranny cooler for my truck for $80 shipped including all lines/hardware
Anyways, I'm planning on installing it along with a complete fluid exchange at roughly the same time. Unfortunately, the transmission cooler lines are thermostatically controlled, so no home flush for me.
This means that the cooler must either be installed before or after the new fluid. Since the 6r80 is known to be very sensitive to fluid levels, along with difficult to check (dipstick is accessible only from under the vehicle, while running, very very close to cats) and fill I'm tempted to install it before bringing it in to the dealer for the fluid service. No known wear issues with the trans, but I am hoping fresh fluid helps with some sticky solenoids and such. Is there any substatial reason to avoid introducing the old ATF in the cooler? I would think that with the complete fluid exchange it will have fresh ATF ran through it anyways?
This means that the cooler must either be installed before or after the new fluid. Since the 6r80 is known to be very sensitive to fluid levels, along with difficult to check (dipstick is accessible only from under the vehicle, while running, very very close to cats) and fill I'm tempted to install it before bringing it in to the dealer for the fluid service. No known wear issues with the trans, but I am hoping fresh fluid helps with some sticky solenoids and such. Is there any substatial reason to avoid introducing the old ATF in the cooler? I would think that with the complete fluid exchange it will have fresh ATF ran through it anyways?