ksig4runner

Last time i went out, my front differential would not engage and i have no front wheel drive at all. The 4wd selector shifts fine but i have no light go on and nothing seems to be engaging.Is this a problem that anyone has had??

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'93 4Runner SR5 V6 3.0 4x4

31 inch bfg at's, K&N drop in, Eclipse deck, Pioneer speakers, Clifford alarm, flowmaster 40 series

Comin' soon: new shocks, Pre runner light bar, 2 off road lights, yakima rack

VolcomTacoma

I'm guessing you have the ADD system, not manual locking hubs right? My 93 which had ADD, also had the 4wd light problem. It would flicker after using 4wd for a while or just not turn on at all, which caused the front diff not to engage. I ended up converting to manual hubs and defeating the ADD system(writeup here: http://www.4x4wire.com/toyota/tech/add/). The light would still act up, but at least my 4wd would work reliably now. I never found out what the problem was and still did it after all the vacuum components were removed, but guessing it was the switch in the front diff.

mastacox

My guess is you have a leak in the vacuum line that leads to your ADD system... It's pretty common even though I have never actually had this problem... You could try looking at the lines and see if they are in one piece.

http://www.off-road.com/toyota/tech/add/index.htm should help with checking the system out.

The little green 4WD light not turning on means the ADD is not engaging, most likely a vacuum malfunction.

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Brian

1998 4Runner SR5

rpeAMP

Also try driving for several minutes in 4Hi. When I first bought my 4Runner, the 4WD virtually hadn't ever been used, so it took about 5 miles to get it the light to stop flickering and for it to engage firmly.

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Preston Edwards

1992 4Runner SR5 V6 4WD (5 Spd.)
246,000 miles & counting
2" Downey coils, 32x11.5x15 BFG A/Ts, Rockcrawler Series 51 wheels, Magnaflow exhaust, Yakima roof rack, ARB bull bar, SAW Torsion bars, (4) PIAA 520s, Cobra 18 WX ST II CB w/ Firestik antenna, hp iPaq GPS

2008 Toyota 4Runner Limted 4X4
15,000 miles & counting

tombothetominator

i 2nd the vaccum check!

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Dont take life seriously, you'll never get out alive.
For those without money or dignity; just add a coke can to the back and call it a race car.
'91 Runner, V6, SR5, 5-speed