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Click on image for the lowdown. 
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8 members (Ridgeback, GMCJammer51, Biermann, Danielbolt, sron48, GIJOE298, Phak1, DadsFirstPickup),
111
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,154 Posts1,056,835 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!
| | THANKS!
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: Oct 2013 Posts: 137 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2013 Posts: 137 | I have a 400 Turbo tranny in my 69'GMC - believe it to be original. Is it a 3 speed - 2 distinguishable shifts, or more likely a 4 speed not making the last shift? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | the TH400 is a 3 speed, no 4th
Bill | | | | | Joined: Feb 2001 Posts: 1,094 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,094 | It will only have 2 shifts, 1st -2nd, 2nd-3rd.
Tommy
59 apache 1/2t
261 short stepside
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