pnichols wrote:
Are those transmission fluid heat charts above really serious -> one has to keep transmission temperatures way down to 185 degrees or less for 100,000+ mile transmission life??? You could of fooled me!!
Those charts are made by transmissions cooler MFGs to scare you into buying their products!
They may have been accurate at one time, but transmissions and fluids have come a LONG ways since the 60s
As for 5R110 upgrades... IMO they aren't really necessary. That transmission is used in applications up to 30,000 and the only difference is the cooler size. Most of the failures seem to be caused by freak electronics issues, such as valves opening out of synch or getting stuck, etc. The Achilles of of the 5R110 is the
way it shifts. Certain shifts can lockup the output shaft if the timing isn't exactly right, because it performs a swap-shift during one of the changes. So... failures can happen, albeit rarely, but I'm not convinced more expensive parts would prevent most of those failures. Exception to the 6.0 Powerstroke E-series owners, who do seem to have cooling problems with the stock setup. The entire cooling system is marginal on that engine.
