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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2013 Posts: 51 Wrench Fetcher | | Wrench Fetcher Joined: May 2013 Posts: 51 | Can I put a reverse lockout lever on sm420 trans? I have a 47 with the lockout and a 1951 with e-brake on driveshaft I know the two trans are like apple and oranges just wondering if it's possible kinda like that feature
1947.5 Chevy 4100 red primer
1951 Chevy 4400 grey primer
| | | | | Joined: Feb 2004 Posts: 29,746 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,746 | The SM420 has a spring loaded reverse gate but it would be possible to add the lockout with some tinkering with the shift lever. You would need a pivoted plate mounted to the shift lever that prevents the shifter from moving into the reverse position by blocking its sideways movement. It might be necessary to modify the twist cap at the top of the transmission tower, also. Having both the spring and the lockout lever is sort of like wearing a belt and suspenders to keep your pants from falling down, isn't it?
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: May 2013 Posts: 51 Wrench Fetcher | | Wrench Fetcher Joined: May 2013 Posts: 51 | Thanks Jerry, Guess I like to show off my belt buckle and stripes on my suspenders 
1947.5 Chevy 4100 red primer
1951 Chevy 4400 grey primer
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