99 toyota 4runner transfer case problem

700xxchris · 06-13-2012, 09:07 PM

ok im new to this forum so hello from Kentucky my name is chris

i have a 99 toyota 4runner i love this vehicle shes my baby i had a new/used t case put in and when i got it back it worked perfect well about a month later i get stuck and went to put it in 4wd and no light on the dash and i can hear it engage put it wont out into full 4wd motion whats going on plz help

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700xxchris · 06-13-2012, 09:20 PM

ok im new to this forum so hello from Kentucky my name is chris

i have a 99 toyota 4runner i love this vehicle shes my baby i had a new/used t case put in and when i got it back it worked perfect well about a month later i get stuck and went to put it in 4wd and no light on the dash and i can hear it engage put it wont out into full 4wd motion whats going on plz help

DixieThunder · 06-13-2012, 11:26 PM

Welcome Chris, I'm a little confused by your wording on your post but one thing I can maybe help with is the light. I can only speak from my experience on my 89 22re 5 speed but I did just have to drop everything last week to replace my clutch so this is rather fresh in my mind. Depending on your T-Case, it has a threaded plug in on the right hand side midway or so up the T-Case that I believe is what sends the signal to the dash light. Are you saying that it does engage into 4wd but it's not delivering power to the wheels? Do you have manual locking hubs or automatic ones? If you have manual hubs did you lock them? Try not to stress to much right now, I know it tough, but there's a lot of great Yota minds on here and we'll help work this out.
Steve.

700xxchris · 06-14-2012, 12:42 AM

i have auto hubs and that exactly what im saying it trys to engage but the front end doesn't do anything.. thanks alot all the help will be appreciated

**dropzone** · 06-14-2012, 12:51 AM

merged your multiple threads.
service manual link:
http://ncttora.com/fsm/index.html

DixieThunder · 06-14-2012, 02:03 AM

Someone else will have to correct me if I am wrong, which is very easily possible because I don't know much about your generation of 4Runner. But I believe that the Auto system is run, in part, by vacuum lines. I have heard of these lines going down on people and them not being able to get the 4wd system disengaged but I could see the possibility of it not allowing the system to engage properly. But I also don't know much about those systems like I said. You are able to put the 4wd stick into the locations for it to go into 4hi/lo correct? It just won't engage the axle?

TheDurk · 06-14-2012, 06:53 AM

Here is a a clip of a post I wrote on another board. I have a '99 4Runner so I know the vacuum ADD system well.

Quote:

Don't guess at it, troubleshoot! Start at the twin VSV's (Vacuum Switching Valves) on the driver fender wall. There are two long vacuum hoses that come up from the diff, one goes to each VSV. Check to see that one of the two hose nipples on the VSV’s has vacuum (engine running, 4WD NOT engaged. If no vacuum either side, check the check valve going to the intake manifold and look for loose hoses or a hole in the reservoir. If there is vacuum going to one hose, then put it in 4WD. See if the vacuum switches to the other hose. If it does, and no 4WD, problem is the diff actuator or the line to the diff. If it does not, then just switch the hoses and you should go into 4WD. This confirms diff is okay.

OK, switch them back. Then use a test light to see if electrical signal from the TC also switches sides of the VSV. If it does not, problem is the switch on the TC. If it does, but the vacuum does not, the problem is the VSV itself.

I start troubleshooting at the VSV's because you can figure out where the trouble is without having to climb under the truck.

You actually won't get much out of the online FSM because the 3rd Gen 4Runner version that is up is for a 2002 and that has an all-electric ADD actuator. The vacuum system is a different beast. A 2G manual or the Taco/T-100 manuals might have something similar--I haven't looked because I have the paper FSM for the '99 4Runner. You might find only manual hubs. Our poor vacuum systems didn't get much love from the on-line FSM gods.

waskillywabbit · 06-14-2012, 07:06 AM

Quote:

Originally Posted by 700xxchris

i have auto hubs and that exactly what im saying it trys to engage but the front end doesn't do anything.. thanks alot all the help will be appreciated

You have ADD which is Automatic Differential Disconnect

NOT

Auto Hubs. You actually have drive flanges.

DixieThunder · 06-14-2012, 10:31 AM

Thanks for the help here guys! I was run out of helpful suggestions on where to proceed from this point forward. Now I sit and watch what it takes for him to fix the problem. Happy wrenching Chris

700xxchris · 06-14-2012, 03:56 PM

thanks guys so much im gonna tear into it this weekend

700xxchris · 06-15-2012, 04:50 PM

does anyone have a pic of a 99 sr5 under the hood to show were these hoses are im a lil dumb founded

TheDurk · 06-17-2012, 07:21 AM

Quote:

Originally Posted by 700xxchris

does anyone have a pic of a 99 sr5 under the hood to show were these hoses are im a lil dumb founded

Battery at right. Hoses emerge from protective tube and connect to top of twin VSV just to right of Oil Fill Cap. Check-valve on vac line incoming from manifold at top center. Reservoir is inside fender and can't be seen. Pic of my '99 SR5.

700xxchris · 06-17-2012, 05:39 PM

thanks very much this is helpful

06-13-2012, 09:20 PM	#2 (permalink)
700xxchris Registered User Personal Sales Rating: (0) [OP] Join Date: Jun 2012 Posts: 10	transfer case problem need help ok im new to this forum so hello from Kentucky my name is chris i have a 99 toyota 4runner i love this vehicle shes my baby i had a new/used t case put in and when i got it back it worked perfect well about a month later i get stuck and went to put it in 4wd and no light on the dash and i can hear it engage put it wont out into full 4wd motion whats going on plz help

06-13-2012, 11:26 PM	#3 (permalink)
DixieThunder Registered User Personal Sales Rating: (0) Join Date: Jul 2011 Location: Covington, Washington Posts: 64	Welcome Chris, I'm a little confused by your wording on your post but one thing I can maybe help with is the light. I can only speak from my experience on my 89 22re 5 speed but I did just have to drop everything last week to replace my clutch so this is rather fresh in my mind. Depending on your T-Case, it has a threaded plug in on the right hand side midway or so up the T-Case that I believe is what sends the signal to the dash light. Are you saying that it does engage into 4wd but it's not delivering power to the wheels? Do you have manual locking hubs or automatic ones? If you have manual hubs did you lock them? Try not to stress to much right now, I know it tough, but there's a lot of great Yota minds on here and we'll help work this out. Steve. Last edited by DixieThunder; 06-13-2012 at 11:29 PM.

06-14-2012, 12:51 AM	#5 (permalink)
dropzone Fossilizing Personal Sales Rating: (3) Staff Join Date: Oct 2005 Location: PNW, rusting away Posts: 13,788	merged your multiple threads. service manual link: http://ncttora.com/fsm/index.html __________________ ~robb '81 Toyota Trekker The B4Runner Mini FAQ/Ideas PNW wheeler group: Gitout.Com

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06-14-2012, 12:42 AM	#4 (permalink)
700xxchris Registered User Personal Sales Rating: (0) [OP] Join Date: Jun 2012 Posts: 10	i have auto hubs and that exactly what im saying it trys to engage but the front end doesn't do anything.. thanks alot all the help will be appreciated

06-14-2012, 02:03 AM	#6 (permalink)
DixieThunder Registered User Personal Sales Rating: (0) Join Date: Jul 2011 Location: Covington, Washington Posts: 64	Someone else will have to correct me if I am wrong, which is very easily possible because I don't know much about your generation of 4Runner. But I believe that the Auto system is run, in part, by vacuum lines. I have heard of these lines going down on people and them not being able to get the 4wd system disengaged but I could see the possibility of it not allowing the system to engage properly. But I also don't know much about those systems like I said. You are able to put the 4wd stick into the locations for it to go into 4hi/lo correct? It just won't engage the axle?

06-14-2012, 10:31 AM	#9 (permalink)
DixieThunder Registered User Personal Sales Rating: (0) Join Date: Jul 2011 Location: Covington, Washington Posts: 64	Thanks for the help here guys! I was run out of helpful suggestions on where to proceed from this point forward. Now I sit and watch what it takes for him to fix the problem. Happy wrenching Chris

06-14-2012, 03:56 PM	#10 (permalink)
700xxchris Registered User Personal Sales Rating: (0) [OP] Join Date: Jun 2012 Posts: 10	thanks guys so much im gonna tear into it this weekend

06-15-2012, 04:50 PM	#11 (permalink)
700xxchris Registered User Personal Sales Rating: (0) [OP] Join Date: Jun 2012 Posts: 10	does anyone have a pic of a 99 sr5 under the hood to show were these hoses are im a lil dumb founded

06-17-2012, 05:39 PM	#13 (permalink)
700xxchris Registered User Personal Sales Rating: (0) [OP] Join Date: Jun 2012 Posts: 10	thanks very much this is helpful

06-17-2012, 05:39 PM
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