hi guy's, I went to put my truck into 4 wheel drive,hit the switch,light came on, but nothing. My tranny blew this summer & had rebuilt one installed by Ammco. I didn't think of checking if it goes into 4 wheel drive when i picked it up(DUMB),anyway, it alway's worked fine & not much use on it. When i turn the switch to 4x4, i here it click & the light comes on showing 4x4 but won't engage. I think Ammco did something to it changing tranny,what do you guy's think??? Oh Ya, Ammco put a Ford rebuilt in,2 day's later it blew again,they put another one in,8 day's later that blew,so now they took it all apart & rebuilt it them selves with an Ammco specialist. $3,000,3 tranny's later, it works fine, IWA vacuum is working,i think the IWA switch behind the battery is working because that's were there clicking sound is coming from, if it click's,dosn't that mean it's working??? Any help or suggestions?? john

 

Ammco put 2 in and THEN rebuilt it themselves? I sure would be leery of the work they did to it. I bet they did something to the 4WD system.....

 

if the transfer case motor has engaged, then the front driveshaft would be connected from the transmission to the front axle. When you shut off the truck and loose vacuum the front IWE should engage and the half shafts will be engaged to the tires... You might jack up one front tire, try to rotate it, and see if it drives thru to the front driveshaft and back to the transfer case. If you are in 4 x 4 , you will not be able to rotate the driveshaft.

 

Best way to check what's wrong is to jack up all 4 wheels. Shift it to 4x4 with the engine running. Put it in gear. If the front driveshaft does not turn its in the transfer case. If the front driveshaft turns it in the front diff or more likely the front hubs. Put it in park. Leave it running and still in 4x4. See if the front half shafts rotate when you spin the wheel by hand. If not you have a IWE or vacuum problem. Unless the trans shop somehow damaged the transfer case I doubt that they caused the problem.

 

HELP!!! Ok, here's what i have tried so far, started truck,put fan on high, put switch to all vents,all blowing,turned switch to 4x4,light came on,did not engage,turned switch to a/c vent and all vents stopped other than a/c vent,meaning i have vacuum. next i had somebody in truck & i layed under it,had him turn 4x4 switch on & off while i hit the transfer case motor,after a couple of hits,instead of clicking like it was,it started to work,trying to engage,then stopped. Now i have nothing,the 4x4 light does not come on,it dosn't even click anymore. So, i must of blown a fuse. Do you guys know anything that can help me?? I don't know where or what fuses to check. I did just pick up a new transfer case motor but want the fuses fixed first. any advise on how to locate them??? TKS

 

could be the fuse, but I would think the connector is corroded or internal motor is corroded or "stuck"....all you did was hit the motor and it worked a few times.. Sounds like motor problems /shaft bushing stuck / etc.

 

Left fender aux relay box.. Ro1 and Ro2

 

before i got under truck to tap on transfer motor as last test,every time i switched from 2 to 4 wheel i could here the solenoid clicking,4x4 light stayed on but didn't engage it. I now got under truck,had somebody turning the 4x4 switch on & off while i hit the motor easy,after a few hits,the motor started to work(tried to engage)then nothing,now the 4x4 light is not working nor is the clicking, it had to blow a fuse,so, when you say R01 & 2 on the left fender(i see them),how can i check them? or do you think the motor shorted out??

 

personally I would bet on the motor. Pull the plug and check for power into the motor.. Book says the RO1 and RO2 are IN and OUT of 4 x 4 . I think I would check for power at the motor and work backward from there if you don't have it.