juiceboxxx26 said:
Need to figure out this jumpiness that I'm having. Sitting at a red light or stop with the truck in drive it feels like a hesitation and slight engagement of something. Sorta feels like it's coming from the front passenger side but I may be wrong. The only thing that i have not checked or replaced in this 4wd system is the disconnect. But I have a service 4x4 light on. Is there a sensor that would throw a light on the disconnect??
Also it feels like hesitation when start driving once I pick up speed it goes away.
Switch says I'm in A4WD
Makes me think the disconnect is the problem
The jumpiness is probably still the rear axle as mentioned above. Check the link given above, "feels like I'm being rear-ended while stopped." I'm feeling like when you drop the cover on your rear differential you're not going to be exactly impressed with how the internals look. It is technically part of your 4-wheel system, too, and at a stop your transfer case should only be sending about 5% torque forward so it really shouldn't be coming from up front.
Things that would upset the system and cause Service 4x4:
-Front axle disconnect. This would be a failure of the actuator to retract or extend as commanded. If the actuator's able to do so but something internal to the disconnect is broken, it likely will not "see" it, which is a shame since more often than not it's something internal to the disconnect that is broken.
-Transfer case encoder motor. If the expected position does not meet the desired position, or there is an issue with the encoder motor brake, it will throw this.
-TCCM. The control module itself could be biting the dust. Actually not that rare, now that I think about it.
-There may be something I'm missing, but the only sensors I know it checks are on the disconnect and the encoder motor.
If absolutely nothing else, and you've tossed in parts and it won't go away, it may be time to just take it in to get it read on a Tech 2 scanner. It'll read all the fancy C and U codes in addition to the standard P codes that any old scanner will do. Get the code numbers and what they mean, the devil is in the details and I'm betting there's a C-code or codes stored in there that'll point you to the holy grail fix.