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09-17-2013, 08:09 AM
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#1 |
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Registered User
Join Date: Jun 2012
Location: Charlotte, NC
Posts: 6
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3-speed manual issues
My 71 has a 3 on the tree. It shifts very well except it will not go into first gear while moving. I have to come to a complete stop. Obvious cause would be a bad syncro - but it doesn't grind or anything. It just will not go into first. I have adjusted the linkage but to no avail.
Am I looking at a syncro issue? How is that fixed? |
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09-17-2013, 08:48 AM
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#2 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,521
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Re: 3-speed manual issues
Have you tried double clutching it?
If not a synchro could be a worn shift fork inside the tranny. |
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09-17-2013, 09:04 AM
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#3 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: 3-speed manual issues
It's neither.The 3 speed in these trucks was not a synchronized low.There is no synchro and it must be at a complete stop to shift into first.
__________________
The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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09-17-2013, 09:07 AM
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#4 | |
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Registered User
Join Date: Jul 2013
Location: Rockwell, NC
Posts: 1,639
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Re: 3-speed manual issues
Quote:
I can downshift mine into first without a fight or any drama while I'm still rolling..... In fact, yesterday it allowed me to even start shifting up and sometimes down without the clutch. I've not been able to do that before. I still don't care much for the transmission but we are at least starting to get along!
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1970 C-10 LWB "Blu" Instagram (current build pictures) 70_nc_c10 |
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09-17-2013, 09:11 AM
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#5 |
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Registered User
Join Date: Jun 2012
Location: Charlotte, NC
Posts: 6
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Re: 3-speed manual issues
My understanding that in 71 the 3-speed manual was a Saginaw and they were fully synchronized. This truck has a 350 in it and my father in law has owned it since new. He swears it would shift into first while moving.
Shift fork sounds like - it feels almost like it is jamming up. |
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09-17-2013, 10:43 AM
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#6 |
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Registered User
Join Date: Jun 2013
Location: West Virginia
Posts: 6,421
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Re: 3-speed manual issues
It's been years since I've driven my 3 speed on the column but I recall it needing to be stopped to go into 1st ("low") gear.
We are actually dealing with some pretty antiquated technology.....we are something of archeologists in a way. My dad has talked about the "double clutch." There is a hot girl on youtube that demonstrates it. :-) |
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09-17-2013, 01:40 PM
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#7 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: 3-speed manual issues
has the tranny ever seen any maintenence? like fliushed and new gear oil installed?
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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09-17-2013, 01:54 PM
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#8 |
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Registered User
Join Date: Jun 2012
Location: Charlotte, NC
Posts: 6
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Re: 3-speed manual issues
I put new fluid in about a month ago.
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09-17-2013, 06:54 PM
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#9 |
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Registered User
Join Date: Mar 2012
Location: Boulder, CO
Posts: 350
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Re: 3-speed manual issues
Sounds like a worn shift fork. I went through two 3 speed boxes on my first car ('60 Chevy Impala convertible), then my uncle, the Chevy wizard, showed me why and how it happened and how to correct it. Also, a gentle but firm hand on the lever works wonders.
Posted via Mobile Device
__________________
If 'that which does not kill me, makes me stronger', then I should be Superman by now! |
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09-17-2013, 07:54 PM
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#10 |
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Registered User
Join Date: Aug 2009
Location: Australia
Posts: 275
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Re: 3-speed manual issues
Loose/worn linkages can also make it hard to get into gear. If they're loose the alignments are out of whack when trying to shift.
In my previous truck I always found it was harder to get into first when things started getting loose, then 2nd and 3rd would become more difficult as time went on - but it always started with 1st. Once it was sorted it shifted a smooth as silk. |
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