At 85K miles in my 1991 F350 IDI Crew Cab Dually with a newly installed Banks Turbo, I'm on my third E4OD tranny. The first spontaneously drained fluid without informing, so it died after 150 feet of driving, and the second grenaded internally while cruising. This third one has a strange ringing noise shifting from first to second, sounding something like the San Francisco cable cars, with two ringing clang-clangs. Also, while in second, under heavy load driving uphill, there is a constant ringing noise,as though the end a long hollow steel bar was dragging on the pavement, making a bell-ringing sound (rather than a scraping sound). I have yet to find anybody that has a clue as to what these noises can indicate. the problem is; it's not like any noise I have heard from a vehicle before in my 55 years of driving. Other than the noises, the tranny works just fine, but I expect it to catastrophically fail if I can't fix it.

Since I am disillusioned with the E4OD, I am looking into alternatives. Any ideas? Monster Transmissions Black Beauty sounds promising. I am happy to with a manual, but I've heard there issues with the flywheel, and that would entail a fair bit of adaptation (which I'm not against). I plan on RV'ing with my new 5th wheel, and do not want to be stuck in the middle of Timbuktoo with another blown transmission.

 

I have a similar problem with my ats 088 turbo'd f350. A grinding noise after letting off the accelerator after pulling a long hill at high power. I thought it was my IP, so i changed that with no effect. Then i thought it was the transmission, but its in good shape with no metal and cool fluid temps. Then i thought it was the turbo but thats also in good shape. Someone mentioned that its the turbo down pipe rubbing the firewall. When the turbo heats up, the exhaust pipes warp and begin touching parts and transmitting noises. Jockeying with the accelerator pedal may change it because it moves the engine on the motor mounts and moves the exhaust too.
just something to think about.

 

I know this is an old thread, but your issue sounds closest to the one I'm having that I can find anywhere. I'm getting the exact noises you described in my truck and can't seem to figure it out. Did you ever find out what was causing the problem? Did your transmission survive?

Thanks!
Scott

 

According to his profile, he hasn't returned since he made that post. You won't get an answer from him.

 

Well crap. I guess I'll need to try my own post lol.

Thanks for the heads up.