What are safe towing numbers? egt, rpm, trans - Ford Powerstroke Diesel Forum

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post #1 of 20 Old 04-19-2013, 02:02 PM Thread Starter
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What are safe towing numbers? egt, rpm, trans

I towed my toy hauler to Vegas last weekend and there are quite a few grades to pull, im just wondering what numbers everyone else goes by when towing. I was trying to limit my egt's to 1250, my trans to 220 and I didnt go above 2700 rpm, my GCWV is about 20-22K. Any advice or personal experience is much appreciated.


"Big Truck" 1997 F-350 CC DRW 4x2 Cali model
Diamond Eye 3" dp to 5" straight pipe, DIY 6637 intake, Pillar gauges, 6.0 trans cooler, Intercooled, TS 6 pos. chip with TW Tunes, 1.0 Housing, Barder Billet Wheel, EBPV Delete

"Baby Truck" 1999 Ranger EC 5 speed 3.slow
Camburg Long Travel, Billit upper arms, Fox dual rate coilovers and double bypass in front, Deaver race pack w/ fox double bypass in rear, fiberglass fenders, 16x8 American Racing Mohave Wheels
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post #2 of 20 Old 04-19-2013, 02:05 PM
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That sounds pretty good to me. I'm not sure about the trans though as I only have standards now.


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post #3 of 20 Old 04-19-2013, 02:19 PM Thread Starter
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The trans is what troubled me the most last weekend, i was towing a 7% grade out of vegas, in 2nd gear and it just kept getting hotter and hotter. had to pull over next to a guard rail with half my rig in the lane to let it cool down. I have the 6.0 cooler ready to go in so hopefully those temp problems are behind me


"Big Truck" 1997 F-350 CC DRW 4x2 Cali model
Diamond Eye 3" dp to 5" straight pipe, DIY 6637 intake, Pillar gauges, 6.0 trans cooler, Intercooled, TS 6 pos. chip with TW Tunes, 1.0 Housing, Barder Billet Wheel, EBPV Delete

"Baby Truck" 1999 Ranger EC 5 speed 3.slow
Camburg Long Travel, Billit upper arms, Fox dual rate coilovers and double bypass in front, Deaver race pack w/ fox double bypass in rear, fiberglass fenders, 16x8 American Racing Mohave Wheels
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post #4 of 20 Old 04-19-2013, 02:48 PM
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There's a sticky on here that has all the safe temps listed.

The 6.0 cooler does wonders.


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2001 F350 SRW CC 4WD LB
ZF6 w/ Southbend, 220k, DIY Intake, WW,NonEBPV Pedestal, CCV Mod, Gauges (Boost, Pyro), 2in Leveling Kit, 4" Straight MBRP, AIH Delete, 2-12" Kicker Comp's, Pioneer Amps
2001 F350 DRW EC 2WD (Rolled Over)
2000 F550 CC 2WD
Automatic, Jasper 4R100 w/Derale Pan & 6.0 Cooler, DIY Intake, AIH Delete, 4" MBRP,
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post #5 of 20 Old 04-19-2013, 02:50 PM
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If it does get hot and you pull over don't shut the truck off. The fluid will cool quicker at idle because it can't circulate if its not running.


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2001 F350 SRW CC 4WD LB
ZF6 w/ Southbend, 220k, DIY Intake, WW,NonEBPV Pedestal, CCV Mod, Gauges (Boost, Pyro), 2in Leveling Kit, 4" Straight MBRP, AIH Delete, 2-12" Kicker Comp's, Pioneer Amps
2001 F350 DRW EC 2WD (Rolled Over)
2000 F550 CC 2WD
Automatic, Jasper 4R100 w/Derale Pan & 6.0 Cooler, DIY Intake, AIH Delete, 4" MBRP,
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post #6 of 20 Old 04-24-2013, 08:24 AM
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I see 220F on my 96 transmission when towing up the grades with the standard cooler, and probably higher in some circumstances. I think it's important to make sure RPMs stay in the 2500+ range and the torque converter is locked. I have a switch on mine to lock the converter manually since I also use the EBPV as an exhaust brake.

Many times I've considered getting a larger cooler, but I just wind up periodically draining the transmission pan of its seven quarts and replace it with new fluid. If/when the transmission finally gives up, I'll probably get a Brian's Truck Stop built transmission because I only use the truck for towing. At that time, BTS will add his large cooler on it.

By the way, when towing and working hard, it's not unusual for me to see 220F and even a bit above for the water and engine-oil temperatures. No problems so far.

Last edited by Airstreamer67; 04-24-2013 at 08:28 AM.
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post #7 of 20 Old 04-24-2013, 08:34 AM Thread Starter
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I was doing pretty good when the TC was locked but I had to drop in to 2nd gear and from what I have read, even with the TC lockup switch it wont lockup in 2nd. I decided to pull over when it hit 240F, I left the truck running but it climbed to 245 before it started to go back down. I checked the front seal and didnt see any leakage. but i dont want to be back in that situation


"Big Truck" 1997 F-350 CC DRW 4x2 Cali model
Diamond Eye 3" dp to 5" straight pipe, DIY 6637 intake, Pillar gauges, 6.0 trans cooler, Intercooled, TS 6 pos. chip with TW Tunes, 1.0 Housing, Barder Billet Wheel, EBPV Delete

"Baby Truck" 1999 Ranger EC 5 speed 3.slow
Camburg Long Travel, Billit upper arms, Fox dual rate coilovers and double bypass in front, Deaver race pack w/ fox double bypass in rear, fiberglass fenders, 16x8 American Racing Mohave Wheels
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post #8 of 20 Old 04-24-2013, 09:13 AM
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I have a Super Duty (see my sig), but putting the 6.0L cooler in was one of the best mods I've done. It dropped my tranny temps a lot. Going from a 9-row cooler to 31-row cooler makes a big difference.


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post #9 of 20 Old 04-24-2013, 09:40 AM
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Also you can upgrade to the super duty 3/8" cooling lines which add another 15* drop in temps from what I hear. Cheap and easy mod.


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post #10 of 20 Old 04-24-2013, 09:50 AM
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Pulling grades on the I-40 I used to see those trans temps, but I moved my cooler and see 190 at the most, I don't have a toy hauler tho, but I hauled another truck through once and with the ic upgraded cooler I rarely go over 200, it's not a 6.0 cooler but works way better than stock, egt's I try and keep at 1200 or less when hauling, and I've dropped to 2nd to get the boost up, hitting 30 psi to drop my egt's climbing at 45 mph

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