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#1
02-26-2009, 10:38 PM
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1990 Toyota 4runner 4wd system
Hi to all you Toyota Fans,
I have a 1990 toyota 4runner that I just purchased knowing that the 4wd system will not work. With that said I will try to explain what it is not doing. When I engage the 4wd lever I don't get any idication of engagement, and the front wheels will not turn. I went into the mud to verify and got stuck. I guess that was not too smart but I did have a friend with his toyota truck that did work and he pulled me out. So with this info can anyone tell me where to start the trouble shooting? I don't have a manual that helps trouble shoot. Thank you in advance for any info. 
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#2
02-26-2009, 11:11 PM
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Re: 1990 Toyota 4runner 4wd system
Quote:
I would check into getting one.
__________________
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. Romans 10:9-10
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#3
03-11-2009, 10:19 AM
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Re: 1990 Toyota 4runner 4wd system
Download a Toyota service manual from here. Check out the transfer case, front differential and front axle sections. Depends on what type of 4WD system you have.
__________________
Forum Guidelines:http://www.automotiveforums.com/vbulletin/guidelines.html "What we've got here is a failure to communicate"
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#4
03-12-2009, 08:09 AM
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Re: 1990 Toyota 4runner 4wd system
More than likely you have the ADD system, and one/both of the Vacuum Switching Valves is not operating (bad, or wire or vac line disconnected).
This would account for no front axle engagement and no 4WD indicator light. If you had the normal (non-ADD) system and didn't lock your manual hubs or had bad auto hubs, the 4WD indicator would still light (unless it's burned out (possible but unlikely)). Do you feel the lower gearing when you put the t-case in LOW range?
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84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, Chevys, AP x-over, BudBuilt x-member, 2" drv trn lift, 36" TSLs, 30 spline Longs 80 something p/u - Buick 231 V6/TH-350 trans, Holley 4 bbl, Weiand intake, dual batts, dual tanks ... 89 4Runner - stock 2000 Isuzu Trooper + 2010 Sonata
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#5
03-16-2009, 06:52 PM
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Re: 1990 Toyota 4runner 4wd system
I have a 94 4Runner and the 4 wheel drive system went, turned out it was the acuator in the front end, it engages your front hubs so you can have 4 wheel drive. With your rig being a 1990 it may have a different acuator setup as 4wheel said.
Good Luck 
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