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10-23-2015, 09:06 PM
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#81
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Senior Member
Join Date: Oct 2014
Posts: 981
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The converter is what makes most of the heat unless it is locked up.
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10-24-2015, 08:23 AM
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#82
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Senior Member
Join Date: Aug 2015
Posts: 308
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Quote:
Originally Posted by Learjet
Why would you not want the converter to lock up? That is a good way to overheat your transmission.
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I learned something. Also got a little concerned that my 'plan' wouldn't work.
With a 3:31 rear towing my upcoming purchase of a 27' Hyperlite my plan was to barely use 6th gear on the open road.
I was concerned about the constant locking and unlocking of the clutches in the Torque Converter (TC) and about the constant down-shifting from 6th to 5th and back up. Which, in my experience is fairly common on the older trannies and leads to them going up in smoke.
Turns out that --
6R80 Specs & Ratios - F150 Hub
6R80 Specs & Ratios
It features torque converter lockup capabilities in all 6 gears
BT:
Hope that's true because I don't believe I will be able to handle 6th gear lockup with all that resistance behind me
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10-24-2015, 01:05 PM
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#83
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Member
Join Date: Mar 2013
Location: Canada
Posts: 36
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ah finally some information that makes sense!
I towed ( yes past tense just bought a 2015 Titan) with a 2002 chev avalanche and pulling a 2011 coachman catalina 24FBS the trans temp was running 210 - 215 across indiana with 85 degree ambient. I was wondering why everyone else is running temps so low. the avalanche of this era had HD cooling for trailering BUT did not have the aux trans cooler it had a bigger cooler in the rad. I also saw that chart and thought I was cooking the trans slowly, now with this discussion i feel a little better about the trailering thing.
I used a scangauge 2 for trans readings cause the stock engine coolant gauge would go up 25 - 35 degree before showing anything on the dash and it freaked me out.
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10-26-2015, 11:25 PM
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#84
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Senior Member
Join Date: Mar 2013
Posts: 259
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Quote:
Originally Posted by The Big Toe
I learned something. Also got a little concerned that my 'plan' wouldn't work.
With a 3:31 rear towing my upcoming purchase of a 27' Hyperlite my plan was to barely use 6th gear on the open road.
I was concerned about the constant locking and unlocking of the clutches in the Torque Converter (TC) and about the constant down-shifting from 6th to 5th and back up. Which, in my experience is fairly common on the older trannies and leads to them going up in smoke.
Turns out that --
6R80 Specs & Ratios - F150 Hub
6R80 Specs & Ratios
It features torque converter lockup capabilities in all 6 gears
BT:
Hope that's true because I don't believe I will be able to handle 6th gear lockup with all that resistance behind me
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It doesn't show what your tv is but I have the 3.31 ratio in my Eco work truck and towed my 9000 pound crossroads with it from BC to Calgary. It had no problem holding 6 th on the flats on cruise control. GCW was 14,900, rated at GCWR15,100. Have to say it towed it better than my 2500 sub with a 7.4 L.
Sent from my iPad using Forest River Forums
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10-27-2015, 07:15 AM
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#85
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Senior Member
Join Date: Apr 2015
Location: central arizona
Posts: 191
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it's amazing what these eco's can do...especially with 3:31 gears....seems those pulls on TC1 were long and steep....you dont say how slow you got or how hot and what rpm's....just curious....actually my real question is....do you feel the motor was laboring anywhere.
__________________
2008 F250 6.4 diesel with 50 gal aux tank towing a 2015 Rockwood 2109s Minilite.
2015 Miles and nights
10040/31
2016 miles and nights
feb. 380/7......march 540/3
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10-27-2015, 07:55 AM
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#86
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Senior Member
Join Date: Aug 2015
Posts: 308
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Quote:
Originally Posted by Dabmeb
It doesn't show what your tv is but I have the 3.31 ratio in my Eco work truck and towed my 9000 pound crossroads with it from BC to Calgary. It had no problem holding 6 th on the flats on cruise control. GCW was 14,900, rated at GCWR15,100. Have to say it towed it better than my 2500 sub with a 7.4 L.
Sent from my iPad using Forest River Forums
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I have a 2013 F150 with the V8. I'm putting supersprings and a Hellwig sway bar on it. The Supersprings are already on it. The Sway bar is supposed to be here tomorrow..
Yes, the EcoBoost has some serious oomph but I understand from those that have towed with both that the dropoff is very little in the Coyote V8.
I'm going to find out
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03-03-2020, 10:51 AM
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#87
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Member
Join Date: Jan 2020
Posts: 46
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I assume by drop off you mean speed. I had a coyote and found it was a great engine but around 60 mph / 100 kph it was sluggish particularly on grades and much worse the steeper they got. I have a 3.5 now and find on hills it is much more responsive. I'm not a fast driver but it drives me nuts not to be able to maintain a reasonable speed on hills without winding the engine up to 4500 + rpm.
Otherwise the coyote is a great engine and being a V8 guy all my life it was hard to make the change. By the way my trailer was 5600 lbs dry and empty.
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03-03-2020, 10:54 AM
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#88
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Member
Join Date: Jan 2020
Posts: 46
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Am I correct in thinking the 2019 f150 3.5 has a 3.55 rear end?
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01-11-2021, 07:54 PM
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#89
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Member
Join Date: Oct 2020
Posts: 45
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Depends....not all of them
Quote:
Originally Posted by Spragueman
Am I correct in thinking the 2019 f150 3.5 has a 3.55 rear end?
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06-07-2021, 09:17 PM
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#90
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Junior Member
Join Date: May 2021
Location: SW Florida
Posts: 3
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Quote:
Originally Posted by aaronwsummers
Depends....not all of them
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Mine does but my friends is 3.73
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06-14-2021, 02:30 PM
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#91
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Member
Join Date: Feb 2020
Location: Sacramento,CA
Posts: 87
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I tow with ‘13 Silverado 1500 6 speed. Going up long, steep grades towing my 3000# trailer here in the Sierra mtn’s my tranny hits 215*. Should I put an aux. trans cooler on it?
Also, would a free flowing muffler help? I ask because a local muffler shop said the stock muffler has 12# back pressure and the Magnaflow they recommended has 3# back pressure and it would make a big difference in the tranny temps.
__________________
2013 Chev Silverado 1500 4x4
2020 Forest River RPod 171
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06-15-2021, 09:59 PM
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#92
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Camping the Natural State
Join Date: Jan 2021
Posts: 756
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Towed 8000+ on hilly curvy 2 lane blacktop with with 6R80 gen 1 3.5 Eco this past week. Coming home ambient temps were 90-93 with 65% humidity. Towed in manual mode, cruise set on 54. Mostly in 4th gear which is slightly lower ratio than 1:1. Shift down to 3rd on hills. 15psi boost at times. Tranny never got over 203.
__________________
2021 Rockwood Ultra Lite 2614 BS
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06-16-2021, 04:05 PM
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#93
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Member
Join Date: Jan 2021
Posts: 73
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Quote:
Originally Posted by VR51
I tow with ‘13 Silverado 1500 6 speed. Going up long, steep grades towing my 3000# trailer here in the Sierra mtn’s my tranny hits 215*. Should I put an aux. trans cooler on it?
Also, would a free flowing muffler help? I ask because a local muffler shop said the stock muffler has 12# back pressure and the Magnaflow they recommended has 3# back pressure and it would make a big difference in the tranny temps.
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In my opinion, no. I tow with a 2012 Yukon XL Denali and have made significant upgrades to the cooling system, including a fan-forced Derale transmission cooler. I often see temps on steep climbs over the mountains of 235ºF pulling a 7,000 lb camper. Your Silverado already likely has the factory external transmission cooler and 215ºF is perfectly fine for the 6L80E. In my opinion having studied this issue to death, it would be a waste of money in your case.
__________________
"If I can't fix it, I can fix it so it can't be fixed"
2012 GMC Yukon XL Denali - Silver - 117K miles
2007 GMC Yukon XL Denali - White - 217K miles
2021 Alpha Wolf 26DBH-L
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06-16-2021, 04:12 PM
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#94
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Member
Join Date: Feb 2020
Location: Sacramento,CA
Posts: 87
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Thanks to all of you. I’m feeling much better about my tranny situation.
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08-22-2021, 05:34 PM
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#95
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Member
Join Date: Oct 2007
Posts: 42
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That chart was wrong 20 years ago and it's wrong today-
(2nd post down)
https://www.silveradosierra.com/tran...ot-t12797.html
That chart does not allow for the vast improvements of base stocks, etc., and other improvements made in the last 20 years.
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08-22-2021, 05:49 PM
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#96
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Senior Member
Join Date: Jun 2021
Posts: 228
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Quote:
Originally Posted by VR51
I tow with ‘13 Silverado 1500 6 speed. Going up long, steep grades towing my 3000# trailer here in the Sierra mtn’s my tranny hits 215*. Should I put an aux. trans cooler on it?
Also, would a free flowing muffler help? I ask because a local muffler shop said the stock muffler has 12# back pressure and the Magnaflow they recommended has 3# back pressure and it would make a big difference in the tranny temps.
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There is no muffler that has any effect what so ever on a transmission.
Furthermore any power increases put into a vehicle of any kind only serve to likely raise the temp of engine and trans. For the most part the efficiency of eternal combustion engines is rather fixed. So adding power generally means adding more fuel so more fuel burned means more heat created.
Too bad the simpletons who say and feel other wise just couldn't use their heads and think.
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08-22-2021, 11:10 PM
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#97
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Senior Member
Join Date: Jul 2015
Location: Where the stars at night are big and bright
Posts: 970
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Quote:
Originally Posted by NJBreeze
There is no muffler that has any effect what so ever on a transmission.
Furthermore any power increases put into a vehicle of any kind only serve to likely raise the temp of engine and trans. For the most part the efficiency of eternal combustion engines is rather fixed. So adding power generally means adding more fuel so more fuel burned means more heat created.
Too bad the simpletons who say and feel other wise just couldn't use their heads and think.
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Exactly and well said. A tranny temperature of 215º towing over a mountain pass in the summer is just fine and perfectly normal. Today's transmissions and engines are computer montored and will warn you if something gets too hot. Fluids and equipment used today are much better that what was used 20 to 30 years ago.
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