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72 BB car only goes in reverse

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Old Aug 25, 2017 | 04:44 PM
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Default 72 BB car only goes in reverse

My buddy just bought a 72 454 4 speed car. He drove it around the block and now it only drives uin reverse regardless of shifter position.

We of course are going to get under the car and check the linkage when we get from Carlisle, but any ideas? Has anyone seen this before?

Thanks!!
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Old Aug 25, 2017 | 06:01 PM
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Originally Posted by BoatDaze
My buddy just bought a 72 454 4 speed car. He drove it around the block and now it only drives uin reverse regardless of shifter position.

We of course are going to get under the car and check the linkage when we get from Carlisle, but any ideas? Has anyone seen this before?

Thanks!!
It sounds like it needs the linkage adjusted. The reverse arm might not be coming fully out of reverse before the shifter itself is out of the reverse gate or the linkage or arm itself might have come off the reverse lever.
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Old Aug 25, 2017 | 07:33 PM
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A back up camera would be a good idea, save your neck from getting sore. Just kidding, sounds like shifter issues.
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Old Aug 25, 2017 | 09:31 PM
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Its going to be fairly obvious when you do finally get under there, but long story short, the car was shifted into reverse and that was the last time that the shifter conveyed any real information to the trans.

Either all the cotter pins fell out, or the mechanism inside of the shifter itself has broken.
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Old Aug 25, 2017 | 10:17 PM
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Does it have a shift interlock deal to the column? I don't remember which year that started.

JIM
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Old Aug 25, 2017 | 11:51 PM
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Adjusting the linkage correctly is an art you develop. Take your time, use the lockout tool and adjust the rod lengths. It is a PIA. Be sure to install the spring retainers correctly.

Do search on linkage adjustments.....plenty out there.

Good luck.
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Old Aug 26, 2017 | 02:18 AM
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Could be it was just its time to lock up due to wear, etc. Or...your buddy could have made a very poor shift that locked up the linkage.

Either way, it should be a simple fix, once you get under the car. If the linkage rods flop around when you wiggle them, you need new bushings and/or new pivot pieces.

Last edited by 7T1vette; Aug 26, 2017 at 02:20 AM.
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Old Aug 27, 2017 | 11:20 AM
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Sounds like the back drive cable is stuck
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Old Aug 27, 2017 | 12:17 PM
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Originally Posted by David Mc
Sounds like the back drive cable is stuck
What is a back drive cable? I am not familiar with that term.
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Old Aug 27, 2017 | 02:11 PM
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Cable/linkage that goes from the transmission back to the steering column. It rotates the column shift bowl.
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Old Aug 27, 2017 | 05:33 PM
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Originally Posted by BoatDaze
...He drove it around the block and now it only drives uin reverse regardless of shifter position...!
This sounds like the shifter is not stuck, and can be moved, however gear does not change.

If that is the case, in some way, the shifter and the linkage are now operating independently.
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Old Sep 26, 2017 | 04:41 PM
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Originally Posted by David Mc
Cable/linkage that goes from the transmission back to the steering column. It rotates the column shift bowl.


isn't that only used on an automatic?
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Old Sep 26, 2017 | 06:17 PM
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No. Used as part of ignition lock for steering wheel. Supposed to lock shifter in reverse on manual cars. Most were disconnected long ago. My car has the components but is disconnected as well.
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Old Sep 26, 2017 | 06:18 PM
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Originally Posted by garyguinn
isn't that only used on an automatic?
Also 4 speeds starting in 1969
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