Question Answered: Stopped at red light then no forward drive , reverse perfect.
June 20, 2013, 04:56 AM
If that is the 6 speed automatic trans, there are 2 engineering documents for that condition. 1 document has not even been released to the service community as of yet. Replace the transmission control module and program the latest calibration. Also, if you are mechanically inclined, replace the 3/5 wave plate and piston seal.
Question Answered: When I step down on my gas pedle my car back fires. Ive changed my plugs & wires
June 04, 2013, 04:20 AM
If that's the motor I think it is, it is the 5.7L "P" motor (8th digit of the vin will be a "P") If so, then it sounds like the Optispark Distributor is having it's common issue. The vent tube on those used to get plugged, and then the optical disc inside flexes on acceleration and causes this problem. You can try to clear this by removing the vent line and CAREFULLY shooting compressed air into the vent hole to remove the debris. If this does not work, then you'll have to remove the cap and rotor (and replace them) and clean the vent from the inside. Unfortunately, this means removing the water pump as well, and it should be replaced when you have it off. Bad design.
Question Answered: Auto shifter switch is in auto to 4wd. Automatically shifted from 2wd.
June 04, 2013, 04:11 AM
If it is in "AUTO" mode, it will be ok for a while. The Auto mode allows for torque transfer only if a wheel or set of wheels starts slipping. It is always in 2-wheel drive until a wheel slips, then the xfer case is engaged. However, on dry pavement, this is not a great idea. Having the 4-wheel drive active on dry ground is not a great thing. There will be issues with low speed turning manuevers, and some extra whining noise at higher speeds. Also, your gas mileage can suffer. Can you get it to shift back out of Auto and back to 2WD? If not, get it diag before replacing any parts. It could be the xfer case control module, the encoder motor, or the switch, or even a wiring issue. Don't waste money throwing parts at it.