PZKW108 wrote:
geordi wrote:
Low speeds and lots of shifting will definitely overheat the transmission fluid, as will not having enough fluid. The dipstick is too long and reaches too deep into the pan, which means when the stick says "full" you are actually midrange to LOW.
First things first. If the actual trans temp light came on, then you have cooked the fluid and it can no longer be trusted to lube the transmission properly. You may also have plugged filters. Pull the pan, change both filters (plate and spin filters) and fill it back up with 8-9 quarts of ATF+4 synthetic fluid. Plan on a short change for these filters and fluid so you can get all the burned fluid out.
Trust the shifting performance more than the dipstick, if it doesn't seem to be shifting smoothly or holding top gear (kicking down too easily) then try adding more fluid first and see if the problem resolves. You may have already done damage if there is a lot of material stuck to the magnet in the pan. Dark grey magnetic paste is normal, chunks are not.
You say : The dipstick is too long and reaches too deep into the pan, which means when the stick says "full" you are actually midrange to LOW.
So full can be LOW ....... not all dipstick are the same , do you have any idea what can happen if you overfill an automatic transmission ???
will cause the fluid to foam, leading to erratic gear shifting, oil starvation and transmission damage.
do you understand that when you tell a newbe : " The dipstick is too long and reaches too deep into the pan, which means when the stick says "full" you are actually midrange to LOW. " it can lead to a failure !!!
this is a wrong advise
Sure, overfilling the transmission can cause foaming but so can overheating.
A over filled automatic transmission will either:
Spit fluid out the breather
Spit fluid out the tail shaft
Spit fluid out the pump seal
The transmission fluid level should be checked while idling in neutral.
And based on my experience as a technician and working with this 545rfe, filling to the full HOT mark plus half a quart is safe. And will help reduce problems with drainback and TC lockup.
Now, if your trasnission is working good without being "overfilled" then good for you.