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BUSY BOLTERS Are you one?  The Shop Area
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Jul 21st, 2025 | | | | Joined: Sep 2008 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2008 Posts: 46 | looking for some help,a starting place, i have a 67 c-10 250 six,with 3.73 gears i drive everyday and am thinking of a trans swap for better mileage, am i crazy. is it worth it and what would be a realistic donor for a trans? any help would be great,trying | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | the transmission has almost nothing to do with mileage unless you do mostly highway driving, in which case an overdrive trans might improve it enough that you'd recover the cost of the swap eventually, if you own the truck long enough
Bill | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The T-5 trans. from a S-10 pickup makes a great swap for that truck. They are plentiful & reasonably priced. They are easy to swap in & would be just right with your rear end ratio.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Oct 2007 Posts: 725 Shop Shark | | Shop Shark Joined: Oct 2007 Posts: 725 | I've said this before, but I think that the T-5/250 combination is about perfect. You'll have another gear for around town and the OD 5th for the highway. Your 3.73 should be great!
Try to find a good '87 back transmission because they have the mechanical speedo cable fitting and will not need an expensive adapter to work with your truck. The best T-5s for your truck are found in S-10s as Wrenchbender Ret. says.
good luck and best wishes,
Les | | |
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