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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: Jul 2014 Posts: 1,292 Moderator for Tons o' Fun , Co-Moderator Driveline Forum | | Moderator for Tons o' Fun , Co-Moderator Driveline Forum Joined: Jul 2014 Posts: 1,292 | Looking for some advice from those who have rebuilt an SM420 Transmission. The rebuild guide says to "press" the 3rd gear bushing ( made of brass alloy ) onto the shaft. The new bushing did not require much of a "press" to install it onto the shaft and press on until it bottoms out on the second speed thrust washer. I was able to force it onto the shaft with my fingers. I'm thinking something is wrong. Either the new mainshaft is undersized or the bushing ID is oversized. Any thoughts on this ?
GM 591482 Bushing, Grp. 4.399, 3rd gear bushing
Ron - - Dusty53 1954 Chevy 3604In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel." | | | | | Joined: Jul 2000 Posts: 2,202 Insomniac | | Insomniac Joined: Jul 2000 Posts: 2,202 | I found the same thing. No press needed - just push it on with fingers.
Gord 🇨🇦
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1954 1/2 ton 235 4 speed
| | | | | Joined: Jul 2014 Posts: 1,292 Moderator for Tons o' Fun , Co-Moderator Driveline Forum | | Moderator for Tons o' Fun , Co-Moderator Driveline Forum Joined: Jul 2014 Posts: 1,292 | Gord&Fran, Well that's good news to hear! I suppose I'll just move on then. Thanks!
Last edited by Peggy M; 02/23/2024 7:23 PM.
Ron - - Dusty53 1954 Chevy 3604In the Gallery Forum "You can't dance with the Devil and then wonder why you're still in Hell."
"They will forget what you've said, and they will forget what you have done but they will never forget the way you made them feel." | | | | | Joined: Feb 2004 Posts: 29,868 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,868 | Use a little green Loctite "stud and bearing mount" if the loose fit concerns you. Just be sure to degrease both parts well with brake or carb cleaner first so the lock goop gets a good bite. 500 degrees F. with a Propane torch breaks the bond if you ever need to disassemble things again.
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!
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