Re: Help! 4x4 stuck
Well to keep things simple, you might want to check the TCCM, or transfer case control module. It comes on ALL electronically equipped 4x4 vehicles. For the most part the TCCM is under the dash to the right of the drivers footwell. Your best bet is to shop around local salvage yards. If you can do basic maintenance on a vehicle, including axle fluid changes, then this won't be too hard of a project to do yourself and shouldn't take more than an hour.
Why salvage yard? Because for a new TCCM from the dealer, you'll be looking into the hundreds of dollars, and, a used one is just as reliable as there is no telling when the TCCM will go. It won't always throw an engine code either, unless there's another 4wd issue that tells the PCM that you do in fact, have a problem.
Your best bet (besides getting a second opinion on the matter as I'm no expert) is to find a low mileage vehicle in a salvage yard and pick the part up. Do not drive more than necessary in 4HI on pavement, or you'll risk damaging the gears and transfer case due to binding. Another quick test is to switch the knob to AWD, and put the transmission in reverse, to see if that'll fool the TCCM to change modes. It's not uncommon with manual 4wd vehicles to have to drive in reverse as the miles pile on to disengage 4wd lock.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!