Outer Limits 4x4 Board

hello all, this might be a stupid question but i will ask it anyway.(some of us dont know much lol) i have a 94 sr5 with auto locking hubs, the front tail shaft spins but i have no drive at the front wheels and the 4x4 light on the dash does not light up are my hubs the problem? any advice would be great
thanks bear

the 4wd light should be connecgted to the transfer, sounds like an issue there, are you sure it is in 4wd??

Tiny wrote:the 4wd light should be connecgted to the transfer, sounds like an issue there, are you sure it is in 4wd??

if front driveshaft is spinning, im thinking yes

yes i am sure its in 4x4 even when i put it in 4low it still doesnt light up and still no drive to the front
thanks bear

Not meaning to sound like a smart ass but have you pressed the button on the side of the transfer case shifter?

thanks ok, yep have pushed it, you can hear the little motor on the transfer case working. I had a bloke check that and he recons thats ok

Last time i had this problem, it turned out my drivers side CV was broken. Don't wanna put you off but you might want to check them and see how they are.

busted cvs would probably make some nasty noises when trying to turn and making steering an issue. Has you lock to lock steering distance changed? could be an axle.

The hubs are engaged via vacuum on these I think??? Did old mate that checked the pump check the whole system? Could be a split or disconnected vacuum line.

Could also be an electrical problem. The A.D.D is activated via solenoids and unless the A.D.D is engaged the light on the dash will not come on. These have been known to fail. I'd check wiring and connections, could be mud in the connections or corrosion inhibiting the circuit. Next on the list would be the solenoids and air lines. Process of elimination. This has also been covered on the Toyota surf site to some extent so jump on there and do a search. Let me know how you go mate.

Cheers,

Chris.

Just something simple that can be easy forgotten is there a fuse on this A.D.D circut

hello all, thanks for the info, i will get a chance on wednesday night to check these things out, just to let yoy know i went out on the weekend and the hubs seem to lock in about 50% of the time. Its weird you press the button and if they come on all is good, but if they dont i can press the button on and off and might not come on at all. If i leave it 4 a while then press it sometimes it works, but i will check all of the things mentioned above and let everyone know. thanks again bear

i'd look for a sticky valve/solinoid or poss dodgy earth something that causes this intermidiate problem

Manual hubs

Layto....

I have had the same problem with my surf. I found that was the vaccume line had pulled off.
Rick

My brother had auto hubs on his lux. Best thing he ever did was ditch them for manual hubs.

If the 4wd light on the dash isn't blown, I'd be looking at the transfer side of things. The tailshaft will spin if you have the hibs locked and the car moves forward . The only way to check is to lift the front end and spin the wheels by hand.
But I'd be looking for a dodgy solinode on the transfer side of things.