I have a 2001 Silverado 3500 with the Allison behind the 8.1 with push button 4wd.
Except when at dead stop, shifting into 4H, the front engages with a loud bag, and also makes significant noise when coming out of 4h to 2h. It engages, I have 4wd. At dead stop, you hear the whiiirrrr of mechanisms working.
Any suggestions as what to look for, where to start? I'm sure this is not OK, I have other GMs and have had GMs over the years without this issue.
Except when at dead stop, shifting into 4H, the front engages with a loud bag, and also makes significant noise when coming out of 4h to 2h. It engages, I have 4wd. At dead stop, you hear the whiiirrrr of mechanisms working.
Any suggestions as what to look for, where to start? I'm sure this is not OK, I have other GMs and have had GMs over the years without this issue.