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| | | Joined: May 2007 Posts: 37 Apprentice | | Apprentice Joined: May 2007 Posts: 37 | I have a 72 c10 with a 12 bolt diff.,at least that's how many bolts are on the rear pan. How does this differential compare to the Ford's 9 inch. It seems that alot of gear heads favour the 9 inch and make that conversion, what do you think.
Question 2
I was given a 1990 c1500 silverado that I intend to use the drive train for the project I'm working on, is the track width wider than the 72 or the same,I don't feel like crawling under the truck to measure as the truck is under a heavy blanket of snow at the moment and I'm taking the lazy route.lol :/
John | | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | The 12 bolt is actually a very good rear. It uses 10 - 15% less HP to move it. Structurally its just as tough. The main reason the 9" is prefered is in gear changing at the track. It takes much longer to swap gears on the fly with a 12 bolt. Where as with a 9" just drop in a new center section. I would use the 12 bolt before dropping big bucks on a 9. A car 12 bolt is not the same a truck 12, parts will not swap. | | | | | Joined: May 2007 Posts: 37 Apprentice | | Apprentice Joined: May 2007 Posts: 37 | Thanks thoroco for your reply, I'm trying to decide which will be the cheapest route to take. I have the 12 bolt that was original but not sure of gear ratio and it is just the standard diff with one wheel the pulls. I do have a 9inch that has 350 gearing and is limited slip and believe the tracking is the same width. I also have a 1990 chev pickup that I intend to use motor and transmission but I'm not sure if the diff would be wider than the original out of the 72 c10 | | |
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