Spartan 210 Tow Performance caused seal or Torque Converter leaks?

[Lone Ranger]

My 09 built F-450 King Ranch, 4x4, Crew Cab, DRW, LOVE THAT TRUCK...

25,000 miles or so (40,000 kms) and something has blown in the bell housing of my 5R110 Transmission. I mean leaking a litre a week, and when torn down there was about litre and a half in the bell housing. Everything was so blown with oil we could not tell the source, all seals looked good, pump housing seal, everything.. We could not find a problem with the TC either, so I have replaced EVERYTHING...

Labour was a lot more expensive than the parts so we did the whole enchilada. However, going forward from here, about 10,000? was done towing a 7 ton Horsefloat, 210 Tow Performance Spartan tune... Is the tune too much for the transmission? Has anyone else had this problem? There have been two in two hundred trucks of the 6.4 vintage in Australia with this kind of leak. One was a defective seal, one was a cracked TC.. We found NEITHER. So it is a bit of a mystery..

Is this just a one off freak? Any help out there???? Thanks in advance from Australia... Cowboy out on the Last Frontier

[Focker]

I just had a very similar problem with mine while towing with the 210TP tune? I was on my way home from a trip and stopped for fuel and noticed my tranny was leaking on the rear of the trans? Not a whole lot, but still leaking. Checked fluid and it was not low? Drove her home and checked the next morning and no fluid on the ground?

[KPBJJ]

Mine got pretty hot towing 10K up a long grade and now leaks a little from the rear of pan somewhere.

[Gerry]

Originally Posted by KPBJJ

Mine got pretty hot towing 10K up a long grade and now leaks a little from the rear of pan somewhere.

What's "pretty hot"???

[KPBJJ]

230* for a little bit

[Gerry]

OK, that's a little warm .

I tow a 48' car trailer that weighs 15,500 lbs (almost 8 tons) with the 250 tune and I've never had a problem. I watch my gages like a hawk and it's never been above 205 and that was for a short time while pulling a hill. It's normally in the 175-180 range and I have approx 60,000 towing miles on the truck.

I don't think the tune has anything to do with it because a lot of folks tow a lot more weight and are fine.