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Topic: Reverse selection problem on 4spd

in Forum: C3 Driveline Components


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Reverse selection problem on 4spd (1/11)
 7/28/12 7:04am
Mortonview
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, - Australia

Vette(s):
1968 Roadster 327/350 4spd


Joined: 1/8/2012
Posts: 2

Hi guys, Have almost finished my restoration but have a small problem with the selection of Reverse. I can lift the T bar and see that the pin rises at the bottom of the shifter lever allowing the shifter to move sideways but the shift lever will not move sideways. If I get under the car I can move the selector rod and the box goes into reverse easly but the shifter lever does not move, I wonder if a pin or bolt has fallen out at the bottom of the shift lever. I can,t see as the gearbox support is in the way. Any suggestions please. Cheers. Rob H
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Re: Reverse selection problem on 4spd (2/11)
 7/29/12 9:14am
NorskyLifetime Member
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Burke, VT - USA

Vette(s):
SOLD - "The Toy" - '70 Convertible
SOLD - "The Beast" - '90 ZR-1 (#682)
SOLD - "Betty" - '28 Ford Model A Tudor
Still have - "BLKBRRD" - '78 Pontiac Trans Am


Joined: 1/23/2002
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This sounds like a problem that "Mr. Transmission" (aka Adams' Apple) should have an answer for.  I need to rebuild the shifter linkage on "The Toy" so hopefully I can learn something here.

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Re: Reverse selection problem on 4spd (3/11)
 7/29/12 10:12am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20128

Sounds like the linkage needs to be adjusted. The reverse lever may be out of alignment with the 1-2 lever on the shifter. All three of the levers have to be in alignment for the shifter to move easily between the gates.
If you can move the linkage on the gearbox, and get it into reverse, but the shifter handle itself will not move to the left when you lift up on the T handle, I would have to say you need to adjust the linkage on the trans to get the shifter gate lined up properly.
If you have the factory shifter, there is a slot on the top of the shifter that is there to allow a "gauge bar" to fit into. You put the bar into the slots, and then adjust the linkage on the trans so that all three linkages fit easily into the shifter arms.
I'll see if I have a pic showing all of this....


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Joel Adams
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Re: Reverse selection problem on 4spd (4/11)
 5/9/15 1:11pm
Firefox
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, - United Kingdom

Vette(s):
'68 327 red manual convertible black roof side pipes


Joined: 5/9/2015
Posts: 3

I know this is a really old thread, but I have the same problem, on the shifter the reverse 'lift to shift' snapped off and I've got a replacement now. But I can't put the car in reverse and I think, as you have said before, the linkage is mis-aligned, do you have the image that you mentioned please
Re: Reverse selection problem on 4spd (5/11)
 5/11/15 12:29pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20128

 Muncie shifter alignment

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Joel Adams
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Re: Reverse selection problem on 4spd (6/11)
 5/12/15 8:08am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2387

Mr. Apple, Can we buy this gauge, or does it have to be fashioned of our own doing.  I have a different one, made from a piece of flat stock and slid in the slot from the side. The top insertion would be MUCH easier.  THANKS!

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Re: Reverse selection problem on 4spd (7/11)
 5/12/15 1:02pm
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20128

Mark, there WAS a tool available back in the day at the dealership. Don't know of anyone that makes, or has them available these days. The above tool is for the factory shifters. The shifters with the slot on the bottom may or may NOT have the "nubs" on the top for this particular gauge bar to fit onto....I don't really remember. The tool certainly make adjustments easier, but it's not absolutely required. Plus...it requires removing the console and boots to get to the top of the shifter. What a pain...LOL  It takes just about the same amount of time to do all of that as it does to do the "adjust/check/adjust/check" method. The tool is most useful with the trans and shifter on a bench, where you can make all of the proper adjustments, easily, then once everything is installed in the vehicle, it's all good to go.  Thumbs Up

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Joel Adams
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Re: Reverse selection problem on 4spd (8/11)
 5/12/15 4:27pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2387

THANK YOU Sir!

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Re: Reverse selection problem on 4spd (9/11)
 5/12/15 7:38pm
johnu
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Scottsdale, AZ - USA

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1981 Corvette Two-Tone Claret color, 4 spd, C7 Vert


Joined: 5/23/2007
Posts: 614

Many times I need to "rock" the car forward in 1st and then it drops in reverse like butter.

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Re: Reverse selection problem on 4spd (10/11)
 5/14/15 3:40am
Firefox
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, - United Kingdom

Vette(s):
'68 327 red manual convertible black roof side pipes


Joined: 5/9/2015
Posts: 3

Success! Thank you all so much, I ended up trying a slightly different method; of applying slight pressure to the shifter, lifting the 'T' and pushing towards reverse, then pressing and releasing the clutch slowly then releasing the shifter, then repeating the whole process again. Anyway it might be a total coincidence but it's worked. I had my first dive out in a long time to get my MOT certificate, and you know what? She drove better than I remember :)
Re: Reverse selection problem on 4spd (11/11)
 5/14/15 9:05am
Adams' AppleLifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20128

  Thumbs Up

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Joel Adams
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(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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