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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: Oct 2016 Posts: 496 Shop Shark | | Shop Shark Joined: Oct 2016 Posts: 496 | Occasionally, under heavy load (going fast and letting off the gas or declining a steep hill) the transmission lever physically slips into neutral. What gives? Not a huge deal... I just put it back in and go on down the road.
1950 suburban 3 on the tree and original Small "peanut" three speed transmission. (sorry I don't know the official name of the transmission)
-Cody
1950 SUBURBAN / SCHOOL BUS A.K.A "THE SCHOOL RUST"
| | | | | Joined: Feb 2001 Posts: 1,096 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,096 | Check the linkages for wear , after that , the wear is in the g/box.
I have found the thrust washer behind 2nd gear worn , selector forks worn , bearings worn , syncro hub worn and all of these combine to tossing the car out of gear , not hard to fix , just difficult to find all the NOS parts . | | | | | Joined: Oct 2016 Posts: 496 Shop Shark | | Shop Shark Joined: Oct 2016 Posts: 496 | ........I dont know what any of that means. Oh boy. I need to get a cutaway with descriptions once I figure out the technical name of my transmission.
1950 SUBURBAN / SCHOOL BUS A.K.A "THE SCHOOL RUST"
| | | | | Joined: Jan 2013 Posts: 1,518 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,518 | Plus worn needle bearings in the clutch gear. An updated clutch gear with a double row of needle bearings fixed a lot of the popping out of third issues.
1953 Chevrolet 3100261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done In the DITY GalleryVideo of the 261 running1964 GMC 1000305 Big Block V6, sm420, the next cab off restoration
| | | | | Joined: Feb 2004 Posts: 29,869 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,869 | Unfortunately, that little transmission "wears out all over". Some of our customers back in the 1950's insisted on installing new, not rebuilt transmissions in Chevy cars and trucks. After several attempts at rebuilding them, I can understand why they felt that way. The saying the oldtimers in our shop had was "Ford transmissions break- - - -Chevvies wear out!"
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: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | If everything checks out in the transmission, it could be an alignment problem. I have a blog post on this topic. Link to blog post.
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