Leaking sometimes, acting weird...? Questions ...?

[tturbonegro]

2000 F450 XLT 7.3 auto crew cab dual wheel utility body with hydrolic dump bed 17k gvw 140k miles

Truck runs and shifts beautifully but then on a hot day last week (95 deg, 80+% humidity) I drove, loaded and dumped the truck about 8 times in an 8 hour day..the last load it started leaking trans fluid pretty good from what looks to be the drip nipple thing in the pan...so I thought it may be the seal had gone bad..?
Let it sit and cool off over night, topped it off with fluid and it didn't leak a drop for abut a week of using it..but now it has started to chug/stahl out when I put it in reverse..the rpms go up and down without being on the pedal, it almost feels like its going to stahl out...but all other gears still shift so perfectly smooth..no hard shifts, no slipping, etc..
But then again on another 90+ degree, loading, dumping, and just running around town it started leaking again pretty good..parked it..cooled off for the night, didn't leak again...untill yesterday ...so what is going on with this intermittent leaking..is this the sign that the trans seal has gone bad and needs replacing? Does the system just need a flushing..? I took it to 3 local shops and none of them want to touch it..haven't had a serious problem with any of my diesels to need a serious mechanic, since a good one is very hard to find in my area...any suggestions?
Its also not throwing any CEL

[giterdone79]

Im having similar issues. After driving my truck for about 30-45 min... my reverse lugs and almost stalls out but i can accelerate through the lugging...I do not have any fluid loss. Just had tranny rebuilt with new convertor, solenoids, and master rebuild kit. All forward gears work great. I have been looking for answers or suggestions to this problem for weeks with no luck. Let me know if you find out anything.

[tturbonegro]

Started slipping bad and it was only 80 deg outside and the truck wasn't being ran all day at all...trans shop says it's tired and I need a rebuild..

[azc9a7]

I've had this issue, except for the slipping. Towing all day, very warm out and a lot of reverse.

The shop diagnosed it as the front pump seal. When the oil gets too hot the seal fails.

Usually letting it cool fixes the leaking. But, there is some damage done.

If you're slipping, you probably are past the band aide of cooling and topping off.

As long as the gears/TC haven't grenaded the trans should be rebuildable at a descent price. Depends on TC and the debris in the pan and what's gone through or stuck in the cooler.

I am by no means a trans expert. There are quite a few on here that should chime in at some point.




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[tturbonegro]

Yea I've been cooling and filling for a couple weeks now..at that point it was just leaking
Local trans shop said $2600 for total in house rebuild..