4wd shift on the fly? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > 4wd shift on the fly?

USA Standard Chromoly Front Axle Shaft Kits with Dana 30 4RT Off-Road Tube Side StepsThe Cure for your Tie Rod Roll!

Reply
Unread 02-20-2014, 05:57 PM   #1
djbckr
Registered User
1988 YJ Wrangler 
 
Join Date: Feb 2014
Location: Redmond, WA
Posts: 9
4wd shift on the fly?

I just got a 1988 Wrangler and it didn't come with a manual. Does anybody know if it's safe to shift into 4wd while moving, or is it best to be stopped before shifting. Also same question for shift from 4H to 4L. I'd love it if I could find a standard operating manual for this year's model. Anybody know where I could find one? (I have the Haynes repair manual)

Thanks in advance!

djbckr is offline   Reply With Quote Quick reply to this message
Unread 02-20-2014, 06:06 PM   #2
ThreeToe
Registered User
1992 YJ Wrangler 
 
Join Date: Jan 2014
Location: Victoria, BC
Posts: 71
Hey, my manual says it's safe to shift into 4H at speeds of 50 mph or less. I usually try to do it at slower speeds, and I always shift into neutral first and hold the clutch in. I've never had a problem. For 4L it says to be doing less than 5mph if I remember correctly. Just be barely moving for 4L.
ThreeToe is offline   Reply With Quote Quick reply to this message
Unread 02-20-2014, 06:13 PM   #3
baritone_mike
Registered User
1988 YJ Wrangler 
 
Join Date: Sep 2010
Location: Puyallup, WA
Posts: 1,892
word for word from my 88 YJ owners manual

4H Position
This position is designed for temporary use of 4-wheel drive for traction when driving in rain, snow, mud, sand, or when driving off road. Do not use 4H on dry, paved roads. To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed.

4L Position
This position is designed for temporary use of 4-wheel drive when off-road driving conditions require added low speed pulling power. Do not use 4L on dry paved roads.
To engage, slow the vehicle to 2-3mph (3-5 km/h), shift the transmission to Neutral (N), then shift the transfer case lever to the right and pull firmly rearward to 4L.

CAUTION: Never attempt to engage Low range when vehicle is moving faster than 2-3 mph (3-5 km/h). Transfer case damage may result.

My words:

(note that in 1988 the highest legal speed limit in the US was 65mph)

When l put it into 4 high, I just make sure I am driving in a straight line and am not accelerating when I go to engage it. For 4 low I always come to a complete stop and either put it in neutral or push the clutch in. When I take it out of 4 low I always come to a complete stop. From 4 high to 2wd I do nothing special.
__________________
˙ɹǝʌo ɹǝʇndɯoɔ ɹnoʎ dılɟ sıɥʇ pɐǝɹ uɐɔ noʎ ɟı
baritone_mike is offline   Reply With Quote Quick reply to this message
Unread 02-20-2014, 06:32 PM   #4
djbckr
Registered User
1988 YJ Wrangler 
 
Join Date: Feb 2014
Location: Redmond, WA
Posts: 9
Thanks guys, I really appreciate that.
djbckr is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 10:29 AM   #5
bigbossd1030
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2010
Location: Edmonton, AB, Alberta
Posts: 2,515
Quote:
Originally Posted by baritone_mike
word for word from my 88 YJ owners manual 4H Position This position is designed for temporary use of 4-wheel drive for traction when driving in rain, snow, mud, sand, or when driving off road. Do not use 4H on dry, paved roads. To engage, shift the transfer case lever from 2H to 4H while the vehicle is moving at any legal speed. 4L Position This position is designed for temporary use of 4-wheel drive when off-road driving conditions require added low speed pulling power. Do not use 4L on dry paved roads. To engage, slow the vehicle to 2-3mph (3-5 km/h), shift the transmission to Neutral (N), then shift the transfer case lever to the right and pull firmly rearward to 4L. CAUTION: Never attempt to engage Low range when vehicle is moving faster than 2-3 mph (3-5 km/h). Transfer case damage may result. My words: (note that in 1988 the highest legal speed limit in the US was 65mph) When l put it into 4 high, I just make sure I am driving in a straight line and am not accelerating when I go to engage it. For 4 low I always come to a complete stop and either put it in neutral or push the clutch in. When I take it out of 4 low I always come to a complete stop. From 4 high to 2wd I do nothing special.
This x100
__________________
[COLOR="DarkGreen"]/l ,[____],
l----L-[]lllllll[]-
()_)-()_)--o)_)[/COLOR]
[COLOR="Blue"]OFFICIAL JEEPER[/COLOR]
[COLOR="Red"]Any Jeepers in Edmonton, AB
I am on channel 33.[/COLOR]
I live, I ride, I am JEEP.
bigbossd1030 is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 11:28 AM   #6
Apollo12227
Registered User
1992 YJ Wrangler 
 
Join Date: Oct 2009
Location: Orlando
Posts: 2,660
Quote:
Originally Posted by djbckr View Post
I just got a 1988 Wrangler and it didn't come with a manual. Does anybody know if it's safe to shift into 4wd while moving, or is it best to be stopped before shifting. Also same question for shift from 4H to 4L. I'd love it if I could find a standard operating manual for this year's model. Anybody know where I could find one? (I have the Haynes repair manual)

Thanks in advance!
http://www.jeepforum.com/forum/f12/w...ft-fly-949926/
Apollo12227 is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 11:29 AM   #7
Apollo12227
Registered User
1992 YJ Wrangler 
 
Join Date: Oct 2009
Location: Orlando
Posts: 2,660
Quote:
Originally Posted by ThreeToe View Post
Hey, my manual says it's safe to shift into 4H at speeds of 50 mph or less. I usually try to do it at slower speeds, and I always shift into neutral first and hold the clutch in. I've never had a problem. For 4L it says to be doing less than 5mph if I remember correctly. Just be barely moving for 4L.
"Any Legal Speed" is the instruction for 4HI engagement on low traction surfaces.
Apollo12227 is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 11:50 AM   #8
grandboost98
Web Wheeler
 
grandboost98's Avatar
1989 YJ Wrangler 
 
Join Date: Aug 2010
Location: Durham/East Haven, CT
Posts: 3,489
Ive never been able to shift into 4hi over 25-30mph. You just hear the CAD grinding till you slow down. The guy at work who just got a YJ asked me and I told him 4hi at any speed and he said he couldnt for the same reason. It doesnt really bother me because when I need 4wd, I usually start off in it rather than shift between 2hi and 4hi but it annoyed him because hes used to his newer truck
__________________
89 Wrangler-3.5" HD BDS lift,M.O.R.E HD 5/8" booms on 35" KM2s
99 Cherokee-2 door,5" lift on 35" KM2s
04 Grand Cherokee Overland
72 Chevy Nova-in progress
http://tiny.cc/BRASSBALLSOFFROAD
grandboost98 is online now   Reply With Quote Quick reply to this message
Unread 02-21-2014, 12:45 PM   #9
bigbossd1030
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2010
Location: Edmonton, AB, Alberta
Posts: 2,515
There are problems if you can't. I can switch at 110km/h. No problem.
__________________
[COLOR="DarkGreen"]/l ,[____],
l----L-[]lllllll[]-
()_)-()_)--o)_)[/COLOR]
[COLOR="Blue"]OFFICIAL JEEPER[/COLOR]
[COLOR="Red"]Any Jeepers in Edmonton, AB
I am on channel 33.[/COLOR]
I live, I ride, I am JEEP.
bigbossd1030 is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 01:31 PM   #10
Anticanman
The Thunder Chunky
 
Anticanman's Avatar
1994 YJ Wrangler 
 
Join Date: Aug 2009
Location: Ripon, California
Posts: 20,580
Quote:
Originally Posted by bigbossd1030 View Post
There are problems if you can't. I can switch at 110km/h. No problem.
I can do it in 12 parsecs.
__________________
Luck Favours The Prepared

"Whiskey is for drinking, Water is for fighting over" - Mark Twain

Quote:
Originally Posted by timatoe View Post
Hmm, that's kinda like asking how much is it to buy a red car....
Anticanman is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 01:38 PM   #11
NHfireLJ
Jeeper Creeper
 
NHfireLJ's Avatar
2005 LJ Wrangler 
 
Join Date: Dec 2009
Location: Seacoast NH
Posts: 3,606
I've even done it at .... Ludicrous speed.
__________________
LUCY...2005 Unlimited "LJ" Rubicon Sahara #495 Build thread. http://www.jeepforum.com/forum/f9/my...hread-2778642/

BETTY...94 SE, Stroker 4.6, 4.5,lift,35"s,D30 Aussie, 8.8. Sold
NHfireLJ is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 01:53 PM   #12
imstillatwork
Registered User
1993 YJ Wrangler 
 
Join Date: Aug 2009
Location: Oregon Coast, Oregon
Posts: 1,578
Yeah.... I went plaid once.
imstillatwork is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 03:21 PM   #13
bigbossd1030
Registered User
1995 YJ Wrangler 
 
Join Date: Feb 2010
Location: Edmonton, AB, Alberta
Posts: 2,515
Oh god. What did I do!
__________________
[COLOR="DarkGreen"]/l ,[____],
l----L-[]lllllll[]-
()_)-()_)--o)_)[/COLOR]
[COLOR="Blue"]OFFICIAL JEEPER[/COLOR]
[COLOR="Red"]Any Jeepers in Edmonton, AB
I am on channel 33.[/COLOR]
I live, I ride, I am JEEP.
bigbossd1030 is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 04:09 PM   #14
Anticanman
The Thunder Chunky
 
Anticanman's Avatar
1994 YJ Wrangler 
 
Join Date: Aug 2009
Location: Ripon, California
Posts: 20,580
Quote:
Originally Posted by bigbossd1030 View Post
Oh god. What did I do!
We ain't too kind to folks talkin metric.
__________________
Luck Favours The Prepared

"Whiskey is for drinking, Water is for fighting over" - Mark Twain

Quote:
Originally Posted by timatoe View Post
Hmm, that's kinda like asking how much is it to buy a red car....
Anticanman is offline   Reply With Quote Quick reply to this message
Unread 02-21-2014, 04:17 PM   #15
Apollo12227
Registered User
1992 YJ Wrangler 
 
Join Date: Oct 2009
Location: Orlando
Posts: 2,660
Quote:
Originally Posted by grandboost98 View Post
Ive never been able to shift into 4hi over 25-30mph. You just hear the CAD grinding till you slow down. The guy at work who just got a YJ asked me and I told him 4hi at any speed and he said he couldnt for the same reason. It doesnt really bother me because when I need 4wd, I usually start off in it rather than shift between 2hi and 4hi but it annoyed him because hes used to his newer truck
2 people makes a majority not.... Sorry mate. Thousands of YJ's out there can shift to 4wd HI at any legal speed.

Fix that cad!
Apollo12227 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.