YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 95.5-2004 Tacomas & 96-2002 4Runners
Sign in using an external account
Register Forgot Password?
Search


95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 12-09-2008, 12:37 PM   #1
Registered User
Personal Sales Rating: (0)
 
andyf0722's Avatar
 
Join Date: Dec 2007
Location: Roslindale, MA
Posts: 15
How to tell if 4WD is working?

My 2000 4Runner SR5 will no longer shift into 4WD. This is a manual shift with the second shifter for 4WD. The one without the button on the side.

I was driving about 2 hours north where there is snow and ice yesterday and couldn't get it to shift into 4WD Hi. The shifter moves into position without problem, but the light does not come on. Also I had no traction on an icy parking lot that is at the end of dirt road that had been plowed to a smooth layer of snow that iced over. I was able to get around slowly and carefully with just 2WD. The part that made it very obvious that the 4WD wasn't engage was when I got the end of the dirt/ice road. At the point where my front tires were on the pavement and my rear tires were on ice I could spin my tires until the rear tire raeched the pavement.

Cut to today when I am back home where there is no snow or ice to test with. I verified that I still couldn't shift into 4WD Hi. I moved back and forth and turned the wheel to see if I could get it to engage. When it was working some movement was often necessary to get it to engage. I checked the fuse and even swapped it with the wiper fuse to ensure the fuse is good. I decided to test 4WD Lo. The light doesn't come on but it does drive differently. I can't be sure if it is 4WD or not. I have no snow or ice to slip on, but pavement isn't dry either to feel the bucking you get when doing a sharp turn on dry pavement in 4WD.

I think I have only use 4WD Lo once in 8+ years, so I am not sure what it should feel like. I don't have a lift, jackstands, or a dynamometer to see if the front wheels spin or not. How can I tell otherwise if I have 4WD or not in Lo gear? Also if it weren't 4WD would shifting into 4WD Lo still feel different?

Any suggestions of anything else I can test to isolate the problem without getting too technical? I don't mind crawling under the vehicle but am reticent to taking anything apart. I'll take it to the mechanic tomorrow to see what they say but I'd like to know as much as I can before doing so. Thanks.
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
2000 4Runner SR5
andyf0722 is offline   Reply With Quote
Old 12-09-2008, 12:40 PM   #2
Registered User
Personal Sales Rating: (0)
 
littlecommando's Avatar
 
Join Date: May 2008
Location: Powder Springs, GA
Posts: 790
Send a message via AIM to littlecommando
you should be able to just tell if it is working or not.

even if your 4wd isnt working, 4lo will feel different, it has more gears, and is slower
__________________
2001 Toyota Tacoma Pre-Runner SR5, Stock, i keep it on the roads.

Gone:
1985 Toyota 4Runner SR5 4WD red, mostly stock, mossy oak seat covers, custom stereo system, Dixie Horn, Custom Rear Bumper

Build Up

Powder Springs, Georgia
littlecommando is offline   Reply With Quote
Old 12-09-2008, 12:45 PM   #3
Registered User
Personal Sales Rating: (0)
 
andyf0722's Avatar
 
Join Date: Dec 2007
Location: Roslindale, MA
Posts: 15
Quote:
Originally Posted by littlecommando View Post
you should be able to just tell if it is working or not.

even if your 4wd isnt working, 4lo will feel different, it has more gears, and is slower
That is kind of what I thought, but wasn't sure.
__________________
2000 4Runner SR5
andyf0722 is offline   Reply With Quote
Old 12-09-2008, 12:47 PM   #4
Registered User
Personal Sales Rating: (0)
 
littlecommando's Avatar
 
Join Date: May 2008
Location: Powder Springs, GA
Posts: 790
Send a message via AIM to littlecommando
this doesnt really help you now, but if you dont ever use your 4wheel drive, it will stop working, you should use it at least twice a year for proper lubracation
__________________
2001 Toyota Tacoma Pre-Runner SR5, Stock, i keep it on the roads.

Gone:
1985 Toyota 4Runner SR5 4WD red, mostly stock, mossy oak seat covers, custom stereo system, Dixie Horn, Custom Rear Bumper

Build Up

Powder Springs, Georgia
littlecommando is offline   Reply With Quote
Old 12-09-2008, 12:51 PM   #5
Registered User
Personal Sales Rating: (0)
 
crolison's Avatar
 
Join Date: Mar 2007
Location: TN
Posts: 2,564
sounds like your add isn't engaging... especially with no 4wd light... in 4hi and on pavement you should be able to tell and hear it in 4wd.
__________________
97 tacoma - 3' of sheet metal
99 4runner - 5spd dd
crolison is offline   Reply With Quote
Old 12-09-2008, 12:55 PM   #6
Registered User
Personal Sales Rating: (0)
 
andyf0722's Avatar
 
Join Date: Dec 2007
Location: Roslindale, MA
Posts: 15
Quote:
Originally Posted by littlecommando View Post
this doesnt really help you now, but if you dont ever use your 4wheel drive, it will stop working, you should use it at least twice a year for proper lubracation
I do use 4WD Hi, but rarely Lo. Is the use of Hi good enough to keep it lubricated for Lo also?
__________________
2000 4Runner SR5
andyf0722 is offline   Reply With Quote
Old 12-09-2008, 01:18 PM   #7
Registered User
Personal Sales Rating: (0)
 
cackalak han's Avatar
 
Join Date: Jul 2006
Location: Tennessee
Posts: 1,836
Yes, 4HI or 4LO will do.

One way to find out if it's working is have a friend look at the front driveshaft while you drive very slowly. If it's turning, then it's working.

Could be the actuator that could be bad. Could be wiring. Could be a vacuum leak.
__________________
UZJ100
cackalak han is offline   Reply With Quote
Old 12-09-2008, 01:32 PM   #8
Registered User
Personal Sales Rating: (0)
 
crolison's Avatar
 
Join Date: Mar 2007
Location: TN
Posts: 2,564
Quote:
Originally Posted by cackalak han View Post
Yes, 4HI or 4LO will do.

One way to find out if it's working is have a friend look at the front driveshaft while you drive very slowly. If it's turning, then it's working.

Could be the actuator that could be bad. Could be wiring. Could be a vacuum leak.
I highly doubt the tcase is messed up, maybe the switch in it is..... i dunno when they switched to electrical add, but if you need any add parts and yours is vacuum i have a whole add diff tube dissembled at home.
__________________
97 tacoma - 3' of sheet metal
99 4runner - 5spd dd
crolison is offline   Reply With Quote
Old 12-09-2008, 01:59 PM   #9
Registered User
Personal Sales Rating: (0)
 
Join Date: Jul 2008
Posts: 340
If it is the add, you might look into converting to manual hubs. It may be cheaper and when you do your solid axel swap after everyone sends you a dollar, you can resue the manual hubs then too.
__________________
[B]Tom H
Mt Vernon, MO
1992 Toyota DLX 4x4 reg cab 3.slow 5 speed
MODS: chevy 63 swap, frame rust repair, SDORI BJ spacers, OME shocks up front doestch tech shocks rear, Downey headers, energy suspension bushings
http://www.yotatech.com/f151/project-oxy-moron-151018/
trbizwiz is offline   Reply With Quote
Old 12-09-2008, 04:04 PM   #10
Registered User
Personal Sales Rating: (0)
 
crolison's Avatar
 
Join Date: Mar 2007
Location: TN
Posts: 2,564
Quote:
Originally Posted by trbizwiz View Post
If it is the add, you might look into converting to manual hubs. It may be cheaper and when you do your solid axel swap after everyone sends you a dollar, you can resue the manual hubs then too.
Rough estimate to do 300-500 bucks for manual hub conversion, vs prolly around 100 (high side) for a new add diff tube. Plus you'll lose abs with the manual hubs, unless you wanna spend more $$ for bearings and seals.
__________________
97 tacoma - 3' of sheet metal
99 4runner - 5spd dd
crolison is offline   Reply With Quote
Old 12-09-2008, 04:21 PM   #11
Contributing Member
Personal Sales Rating: (0)
 
Ironmike4x4's Avatar
 
Join Date: Nov 2004
Location: Upsate SC
Posts: 3,564
Quote:
Originally Posted by littlecommando View Post
this doesnt really help you now, but if you dont ever use your 4wheel drive, it will stop working, you should use it at least twice a year for proper lubracation

My owner's manual recommends once a month for at least 5 miles. As far as knowing if your 4x4 works on high you have 2 options. The hard way: jack up the vehicle and put 4 jackstands and slowly engage 4hi. The easy way: engage 4high and make a hard right or left turn. If you feel a significant drag then it's working. Make sure you check 2 wheel drive to compare the drag if you aren't sure what I'm talking about. The 4low then just put on and you'll know if it crawls very slowly.
__________________
1998 4Runner SR5, Surco Safari rack, diff breather mod, Cobra WXST II CB radio, 31" General Grabber AT2 tires, clear corner/bumper lens, hitch mount backup lamps, KC hilites, PIAA fog lamps, PCV catch can.

Quote:
Originally Posted by Tofer
"ohhh you are one hot 4runner, look at that flex... oh yeahhhh"
Quote:
Originally Posted by YotaFun View Post
Yeah...
Teens these days...
(granted I am 19 ...
Quote:
Originally Posted by peow130 View Post
i don't want your pile of crap, i have my own, i just want your pieces off your pile of crap.
Ironmike4x4 is offline   Reply With Quote
Old 12-09-2008, 07:43 PM   #12
Registered User
Personal Sales Rating: (0)
 
Adam F's Avatar
 
Join Date: May 2002
Location: Cincinnati Ohio
Posts: 2,479
Send a message via AIM to Adam F
Quote:
Originally Posted by cackalak han View Post

One way to find out if it's working is have a friend look at the front driveshaft while you drive very slowly. If it's turning, then it's working.
Not so. Only real way is to jack the truck up on all 4s and put it in 4wd. Or on a dry surface and make a sharp turn and feel for binding.

Reason is, the ADD stuff is in the differential. So even if you have it in 4wd, and the transfer case is doing its job, power will go into the diff, but if the ADD stuff isnt working, power isnt being sent to the wheels, and no 4WD.
Adam F is offline   Reply With Quote
Old 12-10-2008, 04:14 AM   #13
Registered User
Personal Sales Rating: (0)
 
crolison's Avatar
 
Join Date: Mar 2007
Location: TN
Posts: 2,564
Quote:
Originally Posted by Adam F View Post
Reason is, the ADD stuff is in the differential. So even if you have it in 4wd, and the transfer case is doing its job, power will go into the diff, but if the ADD stuff isnt working, power isnt being sent to the wheels, and no 4WD.
The power is being sent to the differential then its being sent to the drivers side wheel, but because of the spider gears the diff just spins.
__________________
97 tacoma - 3' of sheet metal
99 4runner - 5spd dd
crolison is offline   Reply With Quote
Old 12-10-2008, 11:11 AM   #14
Registered User
Personal Sales Rating: (0)
 
andyf0722's Avatar
 
Join Date: Dec 2007
Location: Roslindale, MA
Posts: 15
I was able to verify that the front drive shaft does run when I shift into 4WD. I used my digital camera to record a video. I backed out 10 feet in 2WD, then back forward. Stayed in a straight line to not run over the camera. Then I shifted into 4WD Hi and backed out and in again. The video is very clear. The front drive shaft did not budge on the first pass. Between the first and second pass when I shifted the front drive shaft moves slightly. Then on the second pass it is clearly spinning.

So I guess this means the transfer case is not the issue, but the ADD could still be the problem. Or anything beween there and the hubs.

For those with an interest the video can be viewed here
__________________
2000 4Runner SR5

Last edited by andyf0722; 12-10-2008 at 11:25 AM.
andyf0722 is offline   Reply With Quote
Old 12-10-2008, 12:43 PM   #15
Registered User
Personal Sales Rating: (0)
 
crolison's Avatar
 
Join Date: Mar 2007
Location: TN
Posts: 2,564
Quote:
Originally Posted by andyf0722 View Post
So I guess this means the transfer case is not the issue, but the ADD could still be the problem. Or anything beween there and the hubs.
The only thing between the ADD and the spindles is the cv's. The spindles always spine the cv's...
__________________
97 tacoma - 3' of sheet metal
99 4runner - 5spd dd
crolison is offline   Reply With Quote
Old 06-26-2009, 12:23 PM   #16
Registered User
Personal Sales Rating: (0)
 
andyf0722's Avatar
 
Join Date: Dec 2007
Location: Roslindale, MA
Posts: 15
6 months later and it is back

The problem that occured back in December happened again today. To summarize, it will not shift into 4WD. The front drive shaft does spin when I engage 4WD and doesn't when in 2WD, so it is not the transfer case. However I do not get 4WD and dash light does not turn on. This happened back in December but mysteriously fixed itself. Now it is back. I don't want to rely on it fixing itself this time.

So the problem is between the front drive shaft and front wheels. The ADD has been suggested. Any other suggestions or tests I should do? What components are there. Can someone give me a description like shin bone is connected to the knee bone, knee bone is connected to... Or rather transfer case is connected to the front drive shaft etc...
__________________
2000 4Runner SR5
andyf0722 is offline   Reply With Quote
Old 06-26-2009, 12:58 PM   #17
Registered User
Personal Sales Rating: (0)
 
Join Date: Feb 2005
Location: Clyde, CA
Posts: 107
The below webpage is a write-up for "defeating" the ADD system, but the first part should give you an idea of what is going on:

http://www.4x4wire.com/toyota/tech/add/

Based on my understanding and using the terms from the above site:
Your 4wd is not engaging because the "actuator" is not moving the "sleeve" inside the axle housing. The two common causes of this are: 1) the sleeve is gummed up from non-use, so the vacuum pressure is not sufficient to move it, or 2) there is not enough vacuum pressure (due to a vacuum leak, crimped vacuum line, etc) to force the sleeve to move.

Hope this helps-

-Scubaduck
ScubaDuck is offline   Reply With Quote
Old 08-29-2009, 08:43 AM   #18
Registered User
Personal Sales Rating: (0)
 
Zuke79's Avatar
 
Join Date: Jun 2009
Location: MD/VA
Posts: 47
Does anyone have experience with the method of "defeating" the add system described in the article? Does it work well? What is the best way to lock the sleeve in place (hose clamp)?
I am having the same problem as the OP and I am tired of digging through vac lines and checking relays with no luck on finding the issue. I am putting manual hubs on this week end if it stops raining.
Zuke79 is offline   Reply With Quote
Old 08-29-2009, 08:43 AM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
4wd, 4x4, bad, engage, feel, hard, lo, messed, not, pavement, reason, tacoma, test, transfercase, workin, working

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
4WD not working pozidrive 95.5-2004 Tacomas & 96-2002 4Runners 8 12-03-2008 08:37 AM
HELP! 4wd not working phosho 95.5-2004 Tacomas & 96-2002 4Runners 3 02-03-2008 06:57 PM
4wd not working ddc_5114 86-95 Trucks & 4Runners 8 01-28-2008 02:42 PM
4wd not working LightningDeere 95.5-2004 Tacomas & 96-2002 4Runners 6 03-29-2005 02:31 PM
4wd not working Pretacopower 95.5-2004 Tacomas & 96-2002 4Runners 7 09-27-2004 10:30 PM


All times are GMT -8. The time now is 07:50 AM.


2010 InternetBrands, Inc.