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#76572 04/22/2007 8:52 PM | Joined: May 2006 Posts: 89 Shop Shark | | Shop Shark Joined: May 2006 Posts: 89 | I'd like to put a more "modern" trans in my Big Bolt. It still has the stock 235 babbited engine. Will one from a later 235 work? Any others? Thanks. | | |
#76573 04/23/2007 1:51 PM | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | Yes, but you will probably need to change the bell housing. I put an SM 420 in my 1 Ton, but I had to change the bell housing and get my forward dive shaft shortened. You may also have to change the starter and flywheel.
I believe the easiest way to solve all of this, since you may need engine work to start with, is to find another 235 with an SM 420 already on it from another later model truck. That is what I would do if I was to do it again.
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
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#76574 04/24/2007 12:45 AM | Joined: Nov 2006 Posts: 9 Junior Member | | Junior Member Joined: Nov 2006 Posts: 9 | You ever think of putting a sm465 in? Those are common as dirt, and a pretty bullet proof trans, it's a 3 speed with a creeper gear. Probably would have to do the same changes you would with a 420, but the 465 would be a lot easier and cheaper to find. They put them in pretty much any truck gm made from the late 60s to the early 90s. | | |
#76575 04/24/2007 3:59 PM | Joined: Feb 2007 Posts: 385 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2007 Posts: 385 | This is the best place for transmission information that I have found. Novak Jeep Conversions They have comparisons between the SM420 and SM465, what adapters are needed if any, etc.
195? Chevy 3800 dump truck
1973 Chevy C30 cab and chassis
1987 Suburban 3/4 ton 6.2L Diesel
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