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07-20-2001, 06:59 PM
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#1 |
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Registered User
Join Date: May 2001
Location: Kennan, WI, USA
Posts: 65
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Is the SM420 A Good Tranny?
Well I have a 1967 283 with SM420 (atleast I think) and I am wondering if this is a good tranny. Thanks
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07-20-2001, 07:34 PM
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#2 |
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Web Wheeler
Join Date: Jan 2000
Location: BC, Canada, eh?
Posts: 388
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I like them alot. My 66 C10 has the 420 behind a 292, and then a 250. Lets a 1/2-ton do pull/move things you would only dream of with a 3/4. The 7.02:1 1st gear is killer for rock crawling.
The second gear syncros are known for wearing out. So long as you double-clutch on the 1-2 shift, it will just keep on going. It won't put up with huge torque. Stick to a 283 or a 4.3L v6 at the most. Parts are getting scarce, so I would get a spare before you commit to the project - just in case. Interesting tranny to put in an S10. Are you considering a solid front axle swap too?
__________________
'66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap |
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07-21-2001, 11:35 AM
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#3 |
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Registered User
Join Date: May 2001
Location: Kennan, WI, USA
Posts: 65
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Thats what I have is a 1967 283. What do you mean by double clutching? And what other newer tranny will fit my 283?
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