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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,009 Posts1,055,292 Members48,419 | | 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: Aug 2010 Posts: 32 Apprentice | | Apprentice Joined: Aug 2010 Posts: 32 | Some of you who thought that I shouldn't be so skeptical about if the 2 speed would work. Well I'm eating my words now, cause it works! I used a hand vacuum pump on the rear diaphragm housing, jacked up the rear and had a friend turn the drive line while I put vacuum to it. I knew right away that it should work because the vacuum gauge was reading good numbers and then that beautiful sound...."CLICK". That was the sound of satisfaction. Now the sound isn't loud and the sensation my friend should have felt was subtle. What was the absolute was when we only completed the shift half way and turn the drive shaft was doing nothing. I had a split second fear that we may have broken something. I added vacuum again and "CLICK" it shifted. Thank you GM for making quality parts and I'm apologize to all of those I doubted. | | | | | Joined: Feb 2000 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2000 Posts: 38 | | | |
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