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post #1 of 7 Old 08-11-2009, 08:25 PM Thread Starter
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Trans temp

Finally got my optix gauges hooked up and went for a 400 mile trip today.
My trans is running 190 to 200 on mostly flat ground, unloaded. The trans and converter were rebuilt about 5k ago.
The temp today was about 85 and the truck has the radiator cooler as well as a trucool add on. The stock add on has been bypassed.
That seems a little high to me. Any help?

Darrell

Big Red = 2001 F250 4X4 Crew Cab Short Bed 108K mi.
TS 6 Position Chip, Tony Wildman Tunes , MBRP Stainless 4 inch exhaust
K&N intake, Zoodad mod, HX crossover. Optix boost, pyro and trans temp gauges.
Rebuilt trans with Tugger shift kit and 40,000 gvw TruCool cooler.
Running B100 home brew bio.
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post #2 of 7 Old 08-12-2009, 05:23 AM
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i run about 140 flat, unloaded. no cooling mods yet.

00' F 250 4x4
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post #3 of 7 Old 08-12-2009, 05:52 AM
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yeah seems kinda high for being unloaded... anything blocking air to the coolers??
post #4 of 7 Old 08-12-2009, 06:20 AM Thread Starter
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Cooler is clean and no air flow obstruction.
I have read the cooler bypass can cause high temps if it opens too easily or sticks open.
The cooler I have has it's own bypass valve so I am thinking I could block off the by pass at the transmission.
Anyone tried this before?

Darrell

Big Red = 2001 F250 4X4 Crew Cab Short Bed 108K mi.
TS 6 Position Chip, Tony Wildman Tunes , MBRP Stainless 4 inch exhaust
K&N intake, Zoodad mod, HX crossover. Optix boost, pyro and trans temp gauges.
Rebuilt trans with Tugger shift kit and 40,000 gvw TruCool cooler.
Running B100 home brew bio.
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post #5 of 7 Old 08-12-2009, 07:14 AM
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[QUOTE=bbboomer;1347123]Cooler is clean and no air flow obstruction.
I have read the cooler bypass can cause high temps if it opens too easily or sticks open.
The cooler I have has it's own bypass valve so I am thinking I could block off the by pass at the transmission.
Anyone tried this before?[/QUO


The stock return fluid provides lube to a bushing, this bypass was added to insure when the stock cooler plugged, lubrication would still be provided.

The first thing I would do is have it scanned for any trans codes to make sure the TC clutch is not slipping, then flow test the cooler return.

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post #6 of 7 Old 08-12-2009, 03:35 PM Thread Starter
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I think that is my next plan but I will reverse it and do the cooler flow test first.
I don't have access to an OBII scanner so I will do the free checks first.
Thanks for the help.

Darrell

Big Red = 2001 F250 4X4 Crew Cab Short Bed 108K mi.
TS 6 Position Chip, Tony Wildman Tunes , MBRP Stainless 4 inch exhaust
K&N intake, Zoodad mod, HX crossover. Optix boost, pyro and trans temp gauges.
Rebuilt trans with Tugger shift kit and 40,000 gvw TruCool cooler.
Running B100 home brew bio.
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post #7 of 7 Old 08-13-2009, 05:28 AM
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Trans temps should not get any hotter then about 80 degrees above what it is out side.

1999.5 Ford F-250 7.3l 4x4 PSD DI Short block, Ported Heads, Head studs, Over size valve springs, DI Push Rods, DI RR, GTP38R, GSL 392 fuel pump with 3/8 line feeding 238cc Injectors from Nate @ Unlimited Diesel and Live Tuned By Matt @ Gearhead Automotive

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