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| | | | Joined: Sep 2004 Posts: 4 Junior Member | | Junior Member Joined: Sep 2004 Posts: 4 | My son just bought a 60 1/2 ton with a 350/th350 combo already installed. He is stressing out over the gas this thing drinks. We want to keep the 6-lug axle. I'm thinking a ration of around 3.08 would work well. Is there a simple (cheap) gear swap available? Are ring and pinion combinations available?
Thanks for the help. | | | | | Joined: Nov 2003 Posts: 11 Junior Member | | Junior Member Joined: Nov 2003 Posts: 11 | I was quoted a year or two ago 995$ by an axle shop to put in a posi carrier with new gears, bearings and seals. I'd bet that it is even cheaper if you opt for a conventional differential. | | | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | I once owned a '70 Blazer that had 3.08 gears. It was a factory arrangement and took six-lug wheels. If you could find something like that it might be an easy swap.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | There should be a ring and pinion available somewhere for that axle, I have a '66 six-lug axle that the previous owner swapped a 3.07 into, and I think he paid $250 to have it done. Alternately you could put in a 700R4 tranny, it may be easier in the long run.
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A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | I have 3.07 gears in my 69, with a 350/TH400. Get about 14 mpg on a good day. Too bad you're so far away, this winter I will be replacing it with a 3.42 posi 12 bolt rear end.
Fred
52 3600
69 C-10
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#1977 09/07/2004 10:25 PM | Joined: Feb 2001 Posts: 4,095 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 4,095 | go to randysringandpinion.com for pricing on ring and pinion. the shop locally for same and labor separately. the site also has a calculator for ring and pinion ratios and tire size and rpms.
Ron, The Computer Greek I love therefore I am.1954 3100 Chevy truckIn the Gallery 2017 Buick Encore See more pix1960 MGA Roadster Sold 7/18/2017
| | | | | Joined: Sep 2004 Posts: 4 Junior Member | | Junior Member Joined: Sep 2004 Posts: 4 | Thanks to everyone for your reply. A freind has nearly got me convinced to go with an OD trans instead of gears. Anyone ever put the 700R4 in their 60 truck? Does this sound reasonable? | | |
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