Does this temp chart look right?
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,448
Likes: 2
From: CA Central Coast
Does this temp chart look right?
Actually got this off an old thread, I bookmarked it. Does this look right ot you guys?
Performance Unlimited 4-Wheel & Off Road Center - Hartford, Wisconsin - USA Technical Documents
Performance Unlimited 4-Wheel & Off Road Center - Hartford, Wisconsin - USA Technical Documents
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
Likes: 2,658
From: SE Florida
I can only speak to the trans portion.
That is very outdated. It was probably accurate back in the 60's, but modern automatics have much better materials and are not harmed by high temperatures like that chart shows.
That is very outdated. It was probably accurate back in the 60's, but modern automatics have much better materials and are not harmed by high temperatures like that chart shows.
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,448
Likes: 2
From: CA Central Coast
Interesting, thanks Mark. So other questions then, given your background: I have a 93 F-150 5.0L 4wd LB with a recently rebuilt AOD. 2-3 days a week I haul 100-200 miles, enclosed trailer and load avg 2500-3000 lbs. Sometime 5000lbs for short trips under 20 miles. Foothills and some 2-3 mile grades up to 5-6%.
I have an external trans cooler but want to add a temp gauge. Where do you rest on the sender placement debate, and is an add-on external filter too redundant?
Does my AOD qualify as a "modern transmission"? (It was rebuilt by a local shop, "the old guy" has been around forever, and used "upgrades" on all internal parts).
What temp ranges should I be concerned with?
Many thanks in advance,
Erik
I have an external trans cooler but want to add a temp gauge. Where do you rest on the sender placement debate, and is an add-on external filter too redundant?
Does my AOD qualify as a "modern transmission"? (It was rebuilt by a local shop, "the old guy" has been around forever, and used "upgrades" on all internal parts).
What temp ranges should I be concerned with?
Many thanks in advance,
Erik
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
Likes: 2,658
From: SE Florida
I like the temp sensor in the pressure port in the driver's side of the trans.
The AOD is a modern trans with modern, high temp materials. The max sustained temp is 220F, the short term (less than a half hour) is 250F.
The AOD is a modern trans with modern, high temp materials. The max sustained temp is 220F, the short term (less than a half hour) is 250F.
Cargo Master
Joined: Jun 2003
Posts: 2,982
Likes: 7
From: Somewhere Saskatchewan
I agree with Mark up to a point.
Yes materials have changed over the years but the majority of that change is in the aftermarket.
Manufacturers for the most part still use materials that don't handle heat well.
Fluid is still succeptible to high heat as are gaskets.
Seals harden and start to leak internally.
Once that happens slippage begins.
The temperature chart is still accurate for longivity.
Ultimate temperature is 170*.
The connection that will read the hottest is in a cooler line leading to the cooler.
Manufacturers for the most part still use materials that don't handle heat well.
Fluid is still succeptible to high heat as are gaskets.
Seals harden and start to leak internally.
Once that happens slippage begins.
The temperature chart is still accurate for longivity.
Ultimate temperature is 170*.
The connection that will read the hottest is in a cooler line leading to the cooler.
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Fleet Mechanic
Joined: Feb 2004
Posts: 1,448
Likes: 2
From: CA Central Coast
Thanks guys. I was leaning towards the pressure side, so I guess that'll be it. I may get fancy just for the heck of it and put in two sensors with one gauge, one on each side of the coolers with a switch to toggle back and forth.
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