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Mod | | | Forums66 Topics128,154 Posts1,056,853 Members48,456 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Mar 2004 Posts: 4 New Guy | | New Guy Joined: Mar 2004 Posts: 4 | I have a 1959 Bluebird Bus that had a vacuum shift unit on the differential. I was lucky enough the other day to find a 1955-57 GMC truck with an electric unit that appears to be in good shape. Eveything bolts right up. My problem is tow-fold. First, the rest of the wiring on the parts truck is missing. Does anybody have a diagram? Second, I have now converted to an automatic tansmission. Will that cause me any issues? | | |
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