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[rsr911]

Originally Posted by LMJD

I can think of plenty of people I've known over the years that would argue with you. Every one of them who has pulled a trailer had a failure sooner or later, mostly sooner. Same with many members here. And these are guys who are conscientious and treat their trucks right like Chuckster. He's had good luck with his trans, hopefully it continues. Some years back a Cummins field mechanic who drove a F350 7.3 mechanic's truck and never towed anything was complaining that he'd just had to have the trans overhauled. He said the trans shop told him, See'ya in another 60,000 miles. However, nowdays evidently the independent trans shops can beef them up for more reilability. Banks and ATS both sell a trans shift kit with their turbo kits to compensate for the added HP.

With all due respect, and I have a lot from the help you have provided me, I don't think you read my entire post. I am well aware of the bad rap the E4OD has on this and other forums. I also know that it is based on the C6 which is a well known tough trans and it eventually became the 4R100 after lots of upgrades. The E4OD shift ridiculously slow which I am certain is the cause of many failures, especially when coupled with a heavy load or trailer. A trans cooler and a good shift kit would surely extend the life of the trans. Also my only experience with the trans has been with this van and it's failure was brought on by malfunctioning sensors. For reference I destroyed a stock C6 behind a big block from towing with no shift kit and no aux cooler and that was in a much lighter F100 truck.

I can tell you though from cutting up my old converter for another project that the lockup clutch looks really wimpy LOL