fireman1559

i just bought my second toyota sr5 pickup i had a ford it was crap from day one but anyways i just got the truck and the guy i bought it from said that the front 4wheel drive was not working and i know you have to lock the front yourslef but that still doesnt do anything any help wold be great

thanks mike

one2high

Does the front driveshaft turn when you put the transfer case in 4hi or 4lo? If not, you need to troubleshoot the transfer. If it does, then, you need to start with the hubs and work your way in to the third member.

TOYOTA 1

x2.......

fireman1559

yes the driveshaft turns when it is in 4hi and 4lo

RobD

Does it have locking hubs on the front, such as Warn or Aisin, or does it have the ADD system?

fireman1559

its all stock so i have no clue

Jay351

Or does it have both? To check for ADD, look at the front differential, there should be an actuator on the drivers side stub shaft, and some vacuum hoses comming out and going into the engine bay.

What kind of hubs do you have? Go and look on the hub dial, it should say...

fireman1559

im gonna say it has the ADD my first yota did its to dark to tell but i think it does

Jay351

Check it out tomorrow. If it does, there might be a problem with the actuator or vacuum hoses.

Does the 4wd light come on? Do you here a click when placed into 4wd?
Does it do anything different then your other rig?

fireman1559

the light comes on and i hear a click

904_runner

If the light comes on i thought that meant the front shift tube is in the locked position. How does this guy know the 4wd doesn't work? If i were you i would jack up the front end and turn the truck on and put in 4wd, then turn one of the front wheels and see if the other one turns, this should also turn the driveshaft if it working

fireman1559

i had it on a lift in a shop checking things out before i bought it thats when the guy told me the front 4wheel drive doesnt work

904_runner

okay, well when i first got mine it didnt work either, i ended up throwing on some manual hubs, and messing with the vacuum lines in order to bypass the vsv switches for the A.D.D and locks the shift fork in place.

sorry, i cant post the link for some reason, search for it

"many many questions" Only a few days ago



well there are some pictures, you can only do this if you put manual hubs on. I would try diagnosing your problem unless you want to switch from A.D.D to manual

TomThumb

If you hear a "Click" should be from behind the dash, that means that the shift lever is engaging the ball switch in the trans case and activating the ADD relay. Which will in turn activate the VSS switches under the hood on the pass side. The light coming on the dash should only happen when the locking sleeve has moved over on the front axle putting the truck in 4x4, To me that would show that the add system is working correctly. If you can turn the front drive shaft with the truck in 4x4 and still on the ground my guess is you have issues with the Tcase internals.

Here is a great write up on the different systems used by Toyota found on the Offroad.com fourm. Also explains how to trouble shoot the add system. Found very helpful when geting mine fixed. Turned out to be a broken wire going from the tcase switch to the add relay behind the dash. Good luck!
http://www.off-road.com/trucks4x4/ar....jsp?id=399612

fireman1559

thanks for yalls help i guess its time to see what i can do to get it fixed