I've got the 4wd High/low lights flashing once in a while. I cannot use 4wd switch when this happens. I turn the truck off and on again and everything works again. I have no problems with any other electronics. I just replaced the T-case fluid this morning. I was going to look at the Hall sensors and harnesses when I noticed this online TSB from Ford.
97-21-15 OCT 97 Transfer Case - Shudder/Binding In Tight Turns
• Shudder Or Binding Sensation - In Tight Turns While Vehicle Is In 4x4 Auto Mode - Vehicles Built Through April 1997.
• Transfer Case - Shudder/Binding Sensation In Tight Turns While Vehicle Is In 4x4 Auto Mode - Vehicles Built Through April 1997.
My vehicle fits this build date. I need to check the part number on the GEM but I have a feeling its this calibration problem.
A shudder or binding sensation in tight turns while in 4X4 Auto Mode may be experienced on some vehicles. The shudder is due to a high torque output from the clutch in some transfer cases.
Re-calibrate the existing Generic Electronic Module (GEM) if the GEM is identified with engineering part number F77B-14B205-BB. The revised calibration commands a lower torque which allows the transfer case clutch to engage smoother so shudder or binding should not result.
Hi, i tried the grease and working the conections but no luck. I changed the 4x4 module and i am getting the same exact thing as before i changed it. 4x lights light up when truck starts, when i turn switch to 4x i here the module click but no 4x. Any ideas where to tun next...
My '04 lost 4x4auto & hi/lo when the right front ABS sensor went bad. Figured it out with a Snap-On scanner hooked up driving and the sensor would short when I would turn left.
'00 F350 SC/LB 4x4 V10 3.73 SCT 5 Star Tuned, Banks Cat Back
'04 Explorer XLS 4.0
'98 Expedition XLT 4.6 Scrapped
'86 F-150 5.0 Sold
'79 F-250 4x4
'55 F-350 Dually, waiting to put the '79 gear under the '55.
First of all wanted to say THANK YOU to everyone who has posted in this thread, it took me a couple of hours (slacking off at work) to make my way through, huge amount of useful information. Gratitude.
The short story is that the 4high and 4low illuminate on the cluster during startup, however when I push the buttons nothing happens. That is, unless I do it WHILE I'm starting the truck (so ignition on press button then keep turning until the engine turns over), then 4high comes on. However, I'm not convinced it's actually engaged but haven't had a chance to really test it yet (back end kicks out on slippery roads).
Just tried unplugging the module then plugging it back in, but same problem.
I'm suspecting it's the shift motor itself as there was some damage near the transfer case (heat shield broken, small crack in the case near the drain hole) but want to be a little more certain before I silver bullet the problem and shotgun the part, especially because it's cold and snowy here and working on the truck is difficult.
Any of the brilliant minds in this thread have a thought to add to it? More details in my thread linked above... THANKS AGAIN
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