Chrysler Repair Questions? Ask a Mechanic for Answers ASAP
Hi, your transmission does have a differential just like a rear axle in a rear wheel drive car. The traction control should brake the spinning wheel to send the power to the other wheel. One of them has to spin if there's power going to the transmission. The problem might be a software issue. Traction control also cuts fuel to the engine to reduce the spinning wheels and it might be cutting too much fuel. There might be software updates for the ABS, PCM and or TCM that might improve the traction control function. You'd have to take it o a dealer to find that out though. If not, then yes, spinning the wheels will probably get you up faster.
No, it definitely does not have a locking diff or any type of "posi". In theory, the traction control should work by braking the slipping wheel and that will mechanically transfer the power to the one on dry pavement but if the software is cutting too much fuel, there's no power to send and you'll drift backwards if you're on a steep incline.
It cuts fuel so the engine applies less power to spin the wheel that's spinning along with applying the brake to the spinning wheel. In an axle with an open differential like yours, the wheel with the least traction is going to spin. The traction control picks that up via wheel speed sensors at each wheel and will apply the brake to the spinning wheel. When the brake gets applied to the spinning wheel, the power mechanically transfers to the other wheel. If the software is cutting the fuel too much, there's not enough power to move the vehicle and it rolls backwards if it's on an incline.