1998 Expy 4wd problems - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

fitter9090 · 12-06-2010, 17:46

I have a 98 expy w/5.4 4wd, The 4wd drive has now started to work only once in awhile. I checked the fuses and they are fine. When the selector is turned to A4wd I can hear it click in, but then it will not engage the transfer case. Also that light will flash on the dash too. I think it is the motor on the transfer case that is bad or going bad. Or maybe the switch? Any advice on this? Thanks for your help!

**360ci** · 01-08-2011, 17:52

Correct. The TCCM, or transfer case control module is knowingly shot. Check salvage yards in your area as a dealer will be in the hundreds of dollar range to purchase.

If you're fairly knowledgeable with tools you can swap it out yourself. It's below the dash on the right side below the console; or to the right of the drivers footwell area. It's a hard to access location.

fitter9090 · 01-16-2011, 17:26

Thanks for the input. An update to the problem, A4wd doesn't work at all and 4H and 4L only work when at a complete stop when the selector is switched to them, they also stay engaged nicely. No shift on the fly anymore! Still think it's the TCCM? Or time for a new truck!!!!

**360ci** · 01-16-2011, 17:32

Yes, TCCM is done for. You can attempt to reverse the vehicle slowly while trying to mess with the electric control knob to disengage 4wd, but that is more likely to fix if you had a good ol' fashioned lever on the floor!

Dealer will charge over $400 for a TCCM plus install, if not more. Check around used lots as they knowingly have some hanging around. RockAuto Auto Parts or Car-Part.com--Used Auto Parts Market