When you pull out from a dead stop and tromp the gas, does your WK spin the front tires before all the tires kick in? I thought the Jeep sent more torque split to the rear tires. My ZJ and WJ would always bark the rear tires on hard acceleration, not the front tires.
I dunno which Quadra-whatever I have. Its the NV146 Transfer Case though, with a 10/90 split during normal driving, according to some magazine article.
The NV140 (found with QTI) and the NV245 (found with QTII and QDII) both have a 48/52 F/R torque split, all the time.
The NV146 (found with the SRT8) has a variable torque split - I'm not sure if it can vary all the way from 0/100 to 100/0, but it does transfer torque to the axle with more traction.
Note about QTI: The Grand Cherokee SRT8 uses the Quadra-Trac on-demand system that drives the rear driveshaft and engages the front driveshaft when needed, either when slip is sensed, or with throttle anticipation, which engages the front prior to slip when throttle is applied.
There is one more thing with the SRT transfer case. From a key cycle, the vehicle has to go faster then 22.5 mph to perform some actuator motor / clutch pack test. After that the front should grab quicker. At least that is my understanding...
I just get a chirp, but i guess i have bigger tires. I really think a tune would do me good though. Anything below 2000rpms feels kinda weak to me. Guess im going to email them about the tune again... I've only had the engine back since December, think its broken in yet? lol