4r100 heat - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 13 (permalink) Old 06-26-2012, 05:20 AM Thread Starter
PSN LIL KID
 
Join Date: Jul 2010
Location: Phoenix
Posts: 20
4r100 heat

My 2002 cclb 4x4 trucks trans gauge will get to 205-210* after 35 minutes of driving 65mph or faster in 4th gear on the highway.

What should I check? I would like not to look like an ass if there is nothing wrong with the trans.

Rebuilt Trans & new torq converter have about 15000-17000 (built and installed by a recomended builder on this site)on it and it has always run 205-210 in the summer in phoenix with no load. Seems high to me, i'm scared to hook my 10k toy hauler up and hit the hills in the summer here in AZ.

The truck has a 6.0 trans cooler, 6 pos ts chip unknow tuner, 4.56 gears, 10" lift, 37" toyos on 20" wheels, Mag tech deep pan ( i know it has no effect on cooling), auto meter guages.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #2 of 13 (permalink) Old 06-26-2012, 02:56 PM
Former Ford Trans Engr.
 
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Re: 4r100 heat

Where are you measuring the transmission temperature? In the pan, test port, or cooler line?

Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #3 of 13 (permalink) Old 06-26-2012, 04:40 PM Thread Starter
PSN LIL KID
 
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Re: 4r100 heat

The trans sensor is an Auto-meter single wire unit installed in the test port.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #4 of 13 (permalink) Old 06-26-2012, 04:54 PM Thread Starter
PSN LIL KID
 
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Re: 4r100 heat

Its an Autometer single wire unit installed in the test port.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #5 of 13 (permalink) Old 06-26-2012, 07:06 PM
Former Ford Trans Engr.
 
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Re: 4r100 heat

That is higher than I would expect to see. You could have a restriction in the cooler circuit, something blocking the airflow to the cooler, or a bad bypass on the transmission.

Check for damage to one of the cooler lines. Any damage could restrict the flow to where the bypass opens and the coolers don't get much, if any fluid.

If the lines look fine you can try removing the bypass on the side of the trans. Look for debris holding the ball off of the seat, or a weak spring that can't hold the ball against the seat. It's not uncommon.

Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #6 of 13 (permalink) Old 06-26-2012, 07:44 PM Thread Starter
PSN LIL KID
 
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Re: 4r100 heat

Thanks Mark,

I will check the lines, have you heard of new Ford 6.0 coolers defective?

Also Could my grill restrict enough air to cause this prob. Its the same 1 I had before the trans was replaced, as I recall it seemed to hit 170-180* area with the small 7.3 cooler. I'll try to post a picture of the front of my truck.

The bypass is not the issue. The Trans guy eliminated that bypass with a milled spacer. (which I figured was ok at the time but now Idk)

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #7 of 13 (permalink) Old 06-27-2012, 02:06 AM
Former Ford Trans Engr.
 
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Re: 4r100 heat

If your cooler gets restricted the trans will destroy itself before you know something is wrong. Theq bypass is there to maintain lube flow if the cooler circuit gets restricted.

Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #8 of 13 (permalink) Old 06-27-2012, 06:35 AM Thread Starter
PSN LIL KID
 
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Re: 4r100 heat

The Issue may be with the 6.0 cooler. I'll keep anyone intrested in this thread posted.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #9 of 13 (permalink) Old 06-27-2012, 07:02 AM Thread Starter
PSN LIL KID
 
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Re: 4r100 heat

Mark,

Few years ago there was a lotta talk about how a bad bypass destroyed transmissions. I will put a bypass back in when I resolve this issue.

I'd at least like the oppertunity to react to a problem before Ka-Boom. I grasp the concept very Hot lube = prob, No lube = very big prob.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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post #10 of 13 (permalink) Old 07-10-2012, 03:47 AM Thread Starter
PSN LIL KID
 
Join Date: Jul 2010
Location: Phoenix
Posts: 20
Re: 4r100 heat

Anyone know what the trans should be flowing volume wise when checking at idle in park. I cant find it.

2002 CCLB F250 7.3 w/PMR's, Auto-meter gauges, TS 6 pos chip, 4" exhaust turbo back, 8" lift, 37" Toyos on 20" Mazzi hulks, 6.0 trans cooler, Mag Tech Trans pan, Rebuilt trans, new converter, 4.56 gears.
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