Allison transmission high oil temp concerns
Finished a trip last weekend and noticed tranny oil temp nearing the red zone on my 2004 silverado. Now, a few weeks ago, we did drive through a big swarm of gnats that really coated the front of truc...
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https://www.google.com/search?q=napa+1-8721+magnetic+filter&biw=1093&bih=502&source=lnms&tbm=isch&sa=X&ei=5VSLVdWgLIa9sAXftYLYCQ&ved=0CAcQ_AUoAg#tbm=isch&q=in-line+trans+magnetic+filter
I guess first off is what's "high temp" compared to the spec's
Anyways these filters keeps the nasty's out. Especially after a re-build. You might of just circulated all the stuff the trans shop didn't get out when re-building.
Ford used to recommend to install and to take filter out after a rebuild, after first fluid change I think. (Chevy, I don't know what they think or do) I left mine in and it gets changed once a year. And makes a nice spot to also change fluid. And then Ford recommended not to use them at all because to many people never changed them until their trans blew up again, and wanted to blame re-builder.
They do have a couple downfalls that are critical to be aware of IMO.
1. Yet to find a quality hose clamp to keep it from dripping every so often. (not so big of deal to get under and twist hose clamp every once and while)
2. You have to change them. If you forget to change they could get plugged up and prevent fluid circulating and actually cause more damage. (Very big deal. If you don't change them you have actually installed a shut off valve because they don't have a by-pass mode once they get plugged up)
How I found out about these things and sold on them was at part store one day and maint guy from ambulance company was buying some. Their shop was located in back and next to where I used worked. Got talking and found out the filter is one of the things they put on their equip. Months later talking with auto part owner asked him how many of those filters he sales. He hit a couple of key board strokes and said "not many on a yearly basis, only fleet owners bother to put them on. But it's not unusual for them to get many miles on trans".
Case closed for me.
Another thing, have to taken temps with IR temp gun. Maybe gauge is off. And you could change the cooler or atleast do a "flow test".
Have you ran a magnate thru your old fluid?
(edit part...Just re-read your posting. If your taking it a shop let them screw with it)
I guess first off is what's "high temp" compared to the spec's
Anyways these filters keeps the nasty's out. Especially after a re-build. You might of just circulated all the stuff the trans shop didn't get out when re-building.
Ford used to recommend to install and to take filter out after a rebuild, after first fluid change I think. (Chevy, I don't know what they think or do) I left mine in and it gets changed once a year. And makes a nice spot to also change fluid. And then Ford recommended not to use them at all because to many people never changed them until their trans blew up again, and wanted to blame re-builder.
They do have a couple downfalls that are critical to be aware of IMO.
1. Yet to find a quality hose clamp to keep it from dripping every so often. (not so big of deal to get under and twist hose clamp every once and while)
2. You have to change them. If you forget to change they could get plugged up and prevent fluid circulating and actually cause more damage. (Very big deal. If you don't change them you have actually installed a shut off valve because they don't have a by-pass mode once they get plugged up)
How I found out about these things and sold on them was at part store one day and maint guy from ambulance company was buying some. Their shop was located in back and next to where I used worked. Got talking and found out the filter is one of the things they put on their equip. Months later talking with auto part owner asked him how many of those filters he sales. He hit a couple of key board strokes and said "not many on a yearly basis, only fleet owners bother to put them on. But it's not unusual for them to get many miles on trans".
Case closed for me.
Another thing, have to taken temps with IR temp gun. Maybe gauge is off. And you could change the cooler or atleast do a "flow test".
Have you ran a magnate thru your old fluid?
(edit part...Just re-read your posting. If your taking it a shop let them screw with it)
