Re: GMC 4000 rear axle vacuum shift
Thanks James. This same information is in my manual as well. The bench testing procedure for testing the shift chamber is there but it doesn't mention what the standard operating PSI should be with the engine running.
__________________
USMC Retired
Pollock, LA.
Own a 1961 GMC 4000 (Fontaine Flatbed) with a 305B engine
|