Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 07-06-2012, 11:48 PM   #1
Member
 
Skylerker's Avatar
 
Join Date: Mar 2011
Posts: 30
Towing in 4x4 LO

Can I tow in 4x4 lo. Recently coming down a mountain here in beautiful BC I could not gear down enough because of road condition and steep grade and switch backs. (gravel Forestry road) Even in tow mode and being in 4x4 high still left me using brakes more than I wanted. I have it in my head for whatever reason that one should not tow in 4 lo as it puts an awful lot of stress on your differential. Am I out too lunch on this, please tell me its okay to tow in 4 lo to provide engine braking when conditions warrant it.
__________________

Skylerker is offline   Reply With Quote
Old 07-07-2012, 04:57 AM   #2
Senior Member
 
eric2500hd's Avatar
 
Join Date: Feb 2012
Location: North Central PA
Posts: 118
It would depend on the conditions. You said gravel road so that would help some. You would be limited to very very slow speeds in 4 low. Do you have the ability on your truck to lock it in a gear manually, like 2nd gear. On my Chevy I can put it in tow haul mode and manual shifting mode and then set my top gear, say 2nd or 3rd and it will stay in that gear to provide engine braking.
I would say since you are on a gravel road that is steep with switchbacks your speeds are going to be pretty slow and 4 low may work for you. You can always try it through a couple switchbacks to see how the truck reacts. If you need to shift back into 4 high you could stop in a switchback and do so.
__________________

__________________
TV - 2011 Chevy 2500hd CC SB 4x4 6.0l
TT- 2012 Jay Flight 32bhds- Elite, Thermal, Technology, Hide a Bed, Outdoor Kitchen, Ladder, Power Awning
eric2500hd is offline   Reply With Quote
Old 07-07-2012, 05:06 AM   #3
Senior Member
 
nylyon's Avatar
 
Join Date: Apr 2011
Location: Southeast, NY
Posts: 960
If you are currently using 4-high, then the only difference in using 4-low is the gear reduction in the transfer case. As with any part time 4wd, do not use it on pavement because the wheels NEED to slip. Since you're on dirt roads I would use 4-low.
__________________
Karl - Southeast, NY
2011 Jayco Super Lite 30.5 BHLT
2003 Ford F250 Lariat 6.0 PowerStroke Turbo Diesel My mods Bathroom Door Water Filter TV mount Cork Board
Streamline your A/C
nylyon is offline   Reply With Quote
Old 07-07-2012, 06:15 AM   #4
Senior Member
 
Seann45's Avatar
 
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 9,701
When using the transmission to slow you down keep an eagle eye on the tach so you dont over rev the motor.. going into 4low will increase your RPM's.. if you are worried about over heating your brakes stop every mile or 2 and let them cool...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
175 days boondocking in 2017
215/2016, 211/2015, 196/14, 247/13, 193/12

Seann45 is offline   Reply With Quote
Old 07-07-2012, 10:17 AM   #5
Senior Member
 
Join Date: Feb 2012
Location: SE Wisconsin
Posts: 455
Quote:
Originally Posted by Seann45 View Post
When using the transmission to slow you down keep an eagle eye on the tach so you dont over rev the motor.. going into 4low will increase your RPM's.. if you are worried about over heating your brakes stop every mile or 2 and let them cool...
Good post, especially since the op didn't state gas or diesel. However, if it is a diesel, you can rev them pretty high if you aren't fueling them without causing any harm. In fact, GM removed the 'redline' indicator on the tach because people were freaking out during grade braking.
__________________
1998 Jayco Eagle 302FK (Honda EU3000is)
2016 GMC Sierra Denali 3500HD 4x4 Duramax/Allison
2003 Honda Aquatrax F-12X Turbo
dmax_83 is offline   Reply With Quote
Old 07-08-2012, 10:01 AM   #6
Senior Member
 
Seann45's Avatar
 
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 9,701
Quote:
Originally Posted by dmax_83 View Post
Good post, especially since the op didn't state gas or diesel. However, if it is a diesel, you can rev them pretty high if you aren't fueling them without causing any harm. In fact, GM removed the 'redline' indicator on the tach because people were freaking out during grade braking.
Hey thanks I did not know that.... I had always hard stabbed my brakes to keep it under redline...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
175 days boondocking in 2017
215/2016, 211/2015, 196/14, 247/13, 193/12

Seann45 is offline   Reply With Quote
Old 07-08-2012, 03:06 PM   #7
Site Team
 
FPM III's Avatar
 
Join Date: Nov 2010
Location: Fayette Ridges of PA, USA
Posts: 2,305
Quote:
Originally Posted by dmax_83 View Post
Good post, especially since the op didn't state gas or diesel. However, if it is a diesel, you can rev them pretty high if you aren't fueling them without causing any harm. In fact, GM removed the 'redline' indicator on the tach because people were freaking out during grade braking.
I always thought there was no redline on the tach because the Allison will automatically upshift when the max rpms for the engine is reached. Even if you manually attempt to shift to a lower gear, the transmission will not downshift if the computer knows that by doing so it will over rev the engine.

Manual transmissions are another story as it is possible to over rev an engine. My 96 Ford PSD (with a 5 Sp manual) had a both a yellow and a redline on the tach and I kept close tabs on that tachometer it when decending grades.
__________________
MODERATOR
Can't find what you're looking on JOF? Try:Jayco Owners Forum Custom Google Search

TV: 2009 GMC Sierra 2500HD | Crew Cab | Std. Box | 4WD | Duramax/Allison
RV: 2000 Jayco Eagle 266 | FBS | TT -- 1986 Coleman Laramie pop-up -- Still in the family!!!
FPM III is offline   Reply With Quote
Old 07-08-2012, 07:39 PM   #8
Senior Member
 
Join Date: Dec 2010
Location: North Idaho/Arizona
Posts: 5,303
On gravel roads it is no problem to use 4 lo. If you have a diesel, an exhaust brake is nice. You can also buy a kit to be able to use 2 lo. With that you don't have to worry about being in 4x4 on pavement.
__________________
2011 Eagle 330RLTS with just about every option.
2017 Silverado 1500 4x4 5.3 with tow package.

I was born with nothing and I still have most of it left.
clutch is offline   Reply With Quote
Old 07-08-2012, 07:44 PM   #9
Senior Member
 
TexasA&M's Avatar
 
Join Date: Jun 2010
Location: Ft. Worth, TX
Posts: 388
You won't hurt the truck by towing in 4Low. There isn't any additional stress (probably less stress in some cases) on any of the drivetrain. You'll just be limited to slow speeds (15-20mph).
__________________
'11 G2 32BHDS
TexasA&M is offline   Reply With Quote
Old 07-08-2012, 10:08 PM   #10
Senior Member
 
Join Date: Feb 2012
Location: SE Wisconsin
Posts: 455
I don't want to hijack this thread, but I just want to make sure that I clarify. You can definitely over rev a diesel, but there is a huge difference between an engine under load and an engine grade braking. In fact with the duramax the redline it is approximately 1,500 rpm higher.

To the OP, as others have mentioned, as long as your are not on dry pavement you'll be fine. I use 4 Low often when maneuvering in less that desirable traction.
__________________

__________________
1998 Jayco Eagle 302FK (Honda EU3000is)
2016 GMC Sierra Denali 3500HD 4x4 Duramax/Allison
2003 Honda Aquatrax F-12X Turbo
dmax_83 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 09:25 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.