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post #1 of 9 (permalink) Old 03-17-13, 09:09 PM Thread Starter
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'70 3spd shifter assy. rattle

I have a '70 mustang with a 3 speed manual, the kind that shifts the gears with a set of exterior linkages that go to the side of the transmission. The shifter and shifting work fine but at speeds above 50mph I start to get a rattling sound, by 65 mph it's loud enough to prevent conversation between passengers. The sound is almost definitely coming from the shifter assembly but I don't know how easy it is to fix, should I go to the trouble of dropping the tranny to get to the shifter? or do you know an easier way?


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post #2 of 9 (permalink) Old 03-17-13, 10:06 PM
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Re: '70 3spd shifter assy. rattle

It definitely shouldn't rattle like that. Are you sure the u-joints are okay?

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post #3 of 9 (permalink) Old 03-17-13, 10:57 PM Thread Starter
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Re: '70 3spd shifter assy. rattle

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Originally Posted by Bert View Post
It definitely shouldn't rattle like that. Are you sure the u-joints are okay?
It sounds more like a washer rattling around down there someplace, I can even stop it if I jam the shifter way over to the right so I doubt it's the u-joints.

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post #4 of 9 (permalink) Old 03-18-13, 08:55 PM
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Re: '70 3spd shifter assy. rattle

Can you get it up on a hoist or 4 stands and run it? Maybe you could be under it to pin point the rattle.

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post #5 of 9 (permalink) Old 03-19-13, 06:43 PM
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Re: '70 3spd shifter assy. rattle

Your shifter forks may be coming loose. If you don't have any slop in the linkage, your problem is probably there.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #6 of 9 (permalink) Old 03-19-13, 06:57 PM
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Re: '70 3spd shifter assy. rattle

Apparently it's cured by fitting wavy washers to linkage .

" The "wave washer" (sometimes referred to as a bellville washer) is placed on the linkage stud end just before the flat washer. It is the # 351467-S in the attached diagrams.
Sorry, but I forgot to mention that yes, the wave washer puts a spring like tension on the shifting linkage when attached to the shift levers (at both the transmission and shifter) to prevent the linkage from "rattling" around.

Install all 6 wave washers and the rattling noise you hear should disappear."
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post #7 of 9 (permalink) Old 03-19-13, 10:09 PM Thread Starter
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Re: '70 3spd shifter assy. rattle

I'll keep working on it, but there's almost no slop in the shift linkages, all the wave washers are there, I threw an extra couple flat washers in there to tighten things up anyways so we'll see what happens...

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post #8 of 9 (permalink) Old 12-24-15, 07:27 PM Thread Starter
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Re: '70 3spd shifter assy. rattle

finally coming back to the problem, yep, I think it's the wave washers, does anyone know a source for these washers? I'm having a hard time locating them in the size I need. I'm considering making them myself.

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post #9 of 9 (permalink) Old 12-28-15, 04:05 PM
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Re: '70 3spd shifter assy. rattle

https://www.fastenal.com/products/fa...20Washers%22|~

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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