My 98 olds bravada is stuck in awd and started making a pinging sound towards the rear of the vehicle when you start to take off in forward or reverse. Do not hear the sound when you let off the gas pedal amd coast.It almost sounds like it is in awd but not all the way. Just would like some help as far as where to get started. Computer at Advanced only showed I need to replace O2 sensor. No awd light lit up on dash.
Thanks,
Jeff