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Joined: Aug 2023
Posts: 43 Likes: 4
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2023
Posts: 43 Likes: 4 |
I finally was able to drive my 1948 Chevrolet Fleetmaster Woodie and when I upshift from 1st to 2nd it grinds and also when I downshift from 3rd to 2nd it grinds. Any idea on what the problem is?
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Joined: Sep 2007
Posts: 183
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Sep 2007
Posts: 183 |
You have a worn out synchronizer. The only fix I know of is to replace it with a new one!
Philip Lipton
millnphil@yahoo.com
flip
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Joined: Jan 2002
Posts: 1,069 Likes: 9
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Jan 2002
Posts: 1,069 Likes: 9 |
You can double clutch it and it shouldn't grind. Does it still have the vacuum shift on it.
1946 Chevy 3100 1/2 Ton Pickup Purchased 11/18/17 Sold 9/20
1948 Chevy Fleetmaster Coupe, Purchased 6/20/2010
1965 Chevy ll 350 Purchased Feb 2021. 3-speed Saginaw Hurst Floor Shifter 3.08 Rear End
2019 Ford Ranger Lariat Super Crew
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Joined: Aug 2023
Posts: 43 Likes: 4
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Aug 2023
Posts: 43 Likes: 4 |
Yes, I was told it still has the vacuum shift on it.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The cars with vacuum assisted shift caused the synconizers to wear faster as it placed more strain on them. The 1949 and up used the same syncros. and never had the problem.
Gene Schneider
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Joined: May 2018
Posts: 341 Likes: 6
Backyard Mechanic
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Backyard Mechanic
Joined: May 2018
Posts: 341 Likes: 6 |
Agree. Synchronizer. Had the exact same problem a few years ago.
Jayhawker (on YouTube) has a wonderful set of videos about rebuilding that transmission.
I found a donor transmission and rebuilt it in my basement. On a Saturday I took out my old transmission and put the rebuilt one back in on Sunday. Drives like a dream now. The donor transmission made it so I wasn't out of commission for so long, and assured me I wasn't going to make things worse.
https://www.youtube.com/watch?v=E-tgWVIILdQ&pp=ygUWamF5aGF3a2VyIHRyYW5zbWlzc2lvbg%3D%3D
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