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suggestions /updates for 4-speed conversion
Posted by: Ron62 ()
Date: June 26, 2020 06:22AM

Since I am moving forward with my PG to 4-speed conversion on my 67 500 coupe, I would appreciate any suggested fixes or upgrades that folks have implemented after owning these cars for so long. Clutch cable, linkage, shifter ect. Also any gotchas I should look out for when doing this conversion.

Thanks
Ron

Ron62
1967 500 Coupe 110 PG
Residing in Massachusetts.

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Re: suggestions /updates for 4-speed conversion
Posted by: cnicol ()
Date: June 26, 2020 07:03AM

I'd suggest a "quick shift" conversion, aftermarket or GM. The early model 4-speed shift pattern is gigantic, almost twice the size of the quick shift pattern. 7.5" front to rear vs 4.1" (or 4.5" depending on the approach used.)

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: suggestions /updates for 4-speed conversion
Posted by: Phil Dally ()
Date: June 26, 2020 07:09AM

A bargain at sixty bucks.

[www.corvair.com]

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Re: suggestions /updates for 4-speed conversion
Posted by: solo2r ()
Date: June 26, 2020 07:15AM

What parts do you have already?
Bolt in-Hardest parts to get are a '67-9 clutch pedal and shaft. The rest of parts are easy. { I know one can modify or fabricate a clutch pedal too]
Get a Roger Parent Cable.

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Re: suggestions /updates for 4-speed conversion
Posted by: Ron62 ()
Date: June 26, 2020 08:02AM

I have mostly everything needed at this point. I have a 65 4-speed with matching diff. 67 Pedal assembly, Shift Tube and shaft, Shifter from 66 corsa, cross shaft assembly and brackets for clutch.

I was thinking of installing a Hydraulic clutch of some sort as I see a lot of posts of broken clutch cables and not very good replacements available.

Ron62
1967 500 Coupe 110 PG
Residing in Massachusetts.

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Re: suggestions /updates for 4-speed conversion
Posted by: cnicol ()
Date: June 26, 2020 08:28AM

CORRECTION!

Earlier I wrote: "I'd suggest a "quick shift" conversion, aftermarket or GM. The early model 4-speed shift pattern is gigantic, almost twice the size of the quick shift pattern. 7.5" front to rear vs 4.1" (or 4.5" depending on the approach used.)"


Based on your screen name, I thought you had a '62. Reading your sig line I see you have a '67. My "quick shift" suggestion does not apply to a '67. From the '65 model year on to the end, GM installed a factory "quick shift" that already has the small, 4.1" shift pattern. Sorry for the confusion.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: suggestions /updates for 4-speed conversion
Posted by: Ron62 ()
Date: June 26, 2020 08:43AM

Thanks for the clarification Craig.

Ron62
1967 500 Coupe 110 PG
Residing in Massachusetts.

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Re: suggestions /updates for 4-speed conversion
Posted by: joelsplace ()
Date: June 26, 2020 09:15AM

As Solo2r said Rogers's cable is the fix.

Joel
Northlake, TX
5 Ultravans, 114 Corvairs and counting...

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Re: suggestions /updates for 4-speed conversion
Posted by: 66vairman ()
Date: June 26, 2020 09:26AM

While the 65 and later shift pattern is not "compact" it is acceptable. Personally I didn't like the "quick shift" aftermarket kit on LM cars due to poor shifting qualities (especially reverse). Just me.

Note the rear support on the shift tube was changed in 1966 to an adjustable pivot rod. I'm not sure if the 66 support bracket will fit the holes on a 65 transmission support. I can't verify, but some say there is a fit issue.

Unless you are driving your Corvair A LOT. The clutch cable is fine. Also Roger Parent is selling a new cable that is suppose to be more durable AND it has no rod so you can carry a spare in the trunk.

I'd avoid modifying to a hydraulic clutch release. They are fine IF you drive the car a lot, but they DO NOT LIKE sitting for long periods (hobby car). Just my experience. Give Roger's cable a try and if you have issues you can always pursue a hydraulic design later.

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Re: suggestions /updates for 4-speed conversion
Posted by: Chet Jr ()
Date: June 26, 2020 10:16AM

I’d strongly suggest you consider using this opportunity to select the best possible gearing (tire height, rear, and trans) for your car. Gearing differences can make a BIG difference in the performance, economy and overall enjoyment factors for your particular use.

Termed has a free calculator here

[www.tremec.com]



Chet



Edited 2 time(s). Last edit at 06/26/2020 10:19AM by Chet Jr.

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Re: suggestions /updates for 4-speed conversion
Posted by: Tom Z ()
Date: June 26, 2020 10:26AM

I'd re-braze that piece on better to the "cross shaft" (can't weld over brazing) a good 3-speed shifter will do a cheaper quick shift swap..Unless you've already done it, I eliminated the 10-red to the front by using the 'battery cable' as a sub, dropping down to the starter solenoid (that kept the engine harness plug from melting).. I kept a short ball-end section handy with a "U" cable clamp as a temp-fix;it always broke at the cable end

Tom Z,,Rochester NY

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Re: suggestions /updates for 4-speed conversion
Posted by: American Mel ()
Date: June 26, 2020 10:41AM

My Vert, is a "67 that is sporting a '65 4-spd. thumbs up
As for the Clutch Cable, "If it ain't broke, don't "Fix" it!"
If it does break, fix it CORRECTLY.
As in, just use the factory arrangement of a cable operated clutch.
Roger's cable does appear to be a really good product.
GM spent a tom of cash engineering the cable system to work.
And it DOES!
Yes, even with A LOT of use.
My cars Corvairs, are driven EVERY chance I have, and the CABLE OPERATED Clutch works just fine on a DAILY DRIVER.

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, 80hp, PG
'62 Monza Wagon, 4spd.
'63 Spyder,
'65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dually, approaching 400K
'03 Honda Del Sol
17'Terry

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Re: suggestions /updates for 4-speed conversion
Posted by: American Mel ()
Date: June 26, 2020 11:00AM

In my '66, when I had a cable break on my way home one night, probably about 8 or 9 years ago.
And the car was needed, to go to work the next day, I did a quick trip to Home Depot to make a "Temporary" band-aid fix.
My solution was slightly different from TomZ's.
I used a small clevis shackle, a turn-buckle, and a cable clamp like the one J.O. used.
I looped the cable through one end of the turn-buckle and secured it with the cable clamp.
The other end was supported with the clevis shackle.
I have not needed to crawl under the car to adjust the clutch cable since! grinning smiley


-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
WA. state, 1 mile south of the Canadian border,
I am not at the end of the world, but you can see it from here.
Have; '66 Monza Coupe - 140, 4-spd. Daily driver beater
'67 Monza Vert. - 140, 4-spd. Daily driver beater
'67 A/C Moredoor Monza
Have had; '61 Monza coupe, 80hp, PG
'62 Monza Wagon, 4spd.
'63 Spyder,
'65 Corsa
.
non-vair
'04 Dodge Cummins Quad Dually, approaching 400K
'03 Honda Del Sol
17'Terry

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Re: suggestions /updates for 4-speed conversion
Posted by: 66vairman ()
Date: June 27, 2020 10:43AM

Ron62 - one thing you will want to do is inspect the "Z" pivot (clutch cable on one arm, clutch rod on the other) that mounts between the body and support. It has a plug you remove to insert a grease fitting. A ball support on each end.

I've seen a couple badly worn due to a lack of lubrication. BTW - it takes a LOT of grease to fill the assembly. The other place to check is the pulley up by the gas pedal (in the tunnel). If it's dirty and binding the cable will be stressed.

Good luck.

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