View Single Post
  #5  
Old September 19th, 2020, 03:26 AM
LEWISMATKIN's Avatar
LEWISMATKIN LEWISMATKIN is offline
-= Site Supporter =-
 
Join Date: Jan 2013
Location: RIDGE MANOR, FLORIDA
Truck: 1965 1002 GMC V6-305E
Age: 62
Posts: 283
Rep Power: 137
LEWISMATKIN will become famous soon enough
Default Re: GMC 4000 rear axle vacuum shift

the higher the engine vacuum, the better the shift mechanism will function. vacuum leaks generally will occur first at the diaphram on the slave chamber bolted to the chunk, and secondly the vacuum shift valve on the frame. seems i remember dad using mineral oil from an apothecary to lube the seals the vacuum valve.
__________________

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Last edited by LEWISMATKIN; September 19th, 2020 at 03:27 AM. Reason: misspelling
Reply With Quote