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#29374 08/12/2002 12:53 AM | Joined: Aug 2002 Posts: 30 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2002 Posts: 30 | I have a '61 K10 truck with a 4 speed transmission - on the floor. Engine is the 235. I have two questions - since I've had the truck, the transmission grinds when shifting into 4th. It's never changed, better or worse, but it's always been there. If I double-clutch, it does not grind. What causes this? I've had this truck 15 years with the same behavior.
It has recently started popping out of third gear when not under load - like if I'm coasting down a hill in third gear.
Should I be worried about either issue? I'm running regular 80W-90 in the tranny and transfer case. Thanks in advance!!
1961 Chevrolet K10
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#29375 08/12/2002 3:25 AM | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | 4th gear grind is bad syncro. 3rd poping out probably is too. only issue is both are irritating. probably work that way for a long time. my 57 3spd had no syncros left when I got it [was previously an ambulance] and worked the same for another 30,000mi till I parked it for future resto. it poped out of third on the highway too. Bill  | | |
#29376 08/12/2002 4:34 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Nothing a rebuild kit wouldn`t hurt  It may go on that way for a long time.
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#29377 08/12/2002 12:12 PM | Joined: Apr 2002 Posts: 146 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2002 Posts: 146 | Mine did the same thing. The problem was excessive end play in the output shaft. You need to shim back to factory spec.
if it dosen't need fixed, break it
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#29378 08/12/2002 3:30 PM | Joined: Aug 2002 Posts: 30 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2002 Posts: 30 | Thanks for the info! It sounds like I'll be okay with the way it is for a while. In the meantime, I'll keep the fluids fresh and full.
1961 Chevrolet K10
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