max acceptable sustained trans temp?
07-12-2019, 06:50 AM
#21
Hello. I'm driving a stock 2016 Lariat SuperCrew short bed with a 3.5L EB and max tow package (not HDPP). The rated payload is ~1725#. I used FORScan to change the transmission temp gauge to display the digits above the gauge. I'll be towing a Rockwood Mini-Lite with a GVWR just a shade under 7000#. Everything including tongue weight is within the truck's specs when fully loaded as I will pull it.
What is the maximum acceptable transmission temp on the stock gauge? What is the maximum acceptable sustained temp on the same gauge?
I consider those to be different, e.g., if the temp hits X degrees I need to pull over, now, but even if staying below that I should not drive at X-15 degrees for more than 5 or 10 minutes. If my thoughts about that are misinformed, please advise.
Thanks in advance for your shared wisdom.
What is the maximum acceptable transmission temp on the stock gauge? What is the maximum acceptable sustained temp on the same gauge?
I consider those to be different, e.g., if the temp hits X degrees I need to pull over, now, but even if staying below that I should not drive at X-15 degrees for more than 5 or 10 minutes. If my thoughts about that are misinformed, please advise.
Thanks in advance for your shared wisdom.
07-13-2019, 10:05 AM
#22
Senior Member
Thread Starter
07-13-2019, 01:15 PM
#23
5.0 DOHC V8
Join Date: Apr 2017
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You won't need a "tune" to keep the converter locked, just pay attention to how deep you're tipping into the throttle. Tow/Haul will have the t/c lock sooner, yes. Also, if you've ever ridden a motorcycle, then you're ready to select M, and shift manually with the +/- toggle on the shift lever. A little higher rpm should also keep the t/c locked, then you can open the throttle and start shoveling some coal.
07-15-2019, 09:20 AM
#24
2019 XLT FX4 screw with 3.5 EB and HDPP. Pulled my 27 ft trailer over Wolf Creek Pass (10500) this weekend and 233 max on trans. That's a hill with a pull for you flatlanders. Not to mention going over Slumgullion Pass to Lake City Co. at 11,500. Not as bad because turns and up and downs unlike the straight uphill pull on Wolf Creek.
Last edited by BobnCo; 07-15-2019 at 09:28 AM. Reason: pic
07-15-2019, 09:33 AM
#25
07-15-2019, 12:13 PM
#26
Grumpy Old Man
That heat exchanger is an auxiliary cooler, in addition to the standard OTW cooler in the bottom of the radiator.
Last edited by smokeywren; 07-15-2019 at 12:16 PM.
07-15-2019, 03:04 PM
#27
Senior Member
Thread Starter
2019 XLT FX4 screw with 3.5 EB and HDPP. Pulled my 27 ft trailer over Wolf Creek Pass (10500) this weekend and 233 max on trans. That's a hill with a pull for you flatlanders. Not to mention going over Slumgullion Pass to Lake City Co. at 11,500. Not as bad because turns and up and downs unlike the straight uphill pull on Wolf Creek.
07-15-2019, 03:33 PM
#28
07-15-2019, 10:24 PM
#29
I saw 230F today towing about 3000pounds up a 7% sustained grade in Utah......3rd gear and about 2500rpm.
A big factor is vehicle speed. Crawling up a steep 4x4 trail with 3000lb trailer gets high temp numbers.
Analog display was still in middle of range and a long way from the red and yellow bands.
2016 5.0 towpackage 3.55 4x4
A big factor is vehicle speed. Crawling up a steep 4x4 trail with 3000lb trailer gets high temp numbers.
Analog display was still in middle of range and a long way from the red and yellow bands.
2016 5.0 towpackage 3.55 4x4
07-15-2019, 10:48 PM
#30
Grumpy Old Man
You read something wrong somewhere. You may have max tow, but if you're in the USA you don't have the heavy duty payload package (HDPP). No such thing as a 5.5' bed with HDPP in the USA. Probably not in Canada either, but Canuk specs are different than ours.
Last edited by smokeywren; 07-15-2019 at 10:51 PM.