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1965 to 1966-69 u-Yoke swaps?
Posted by: Matt E. ()
Date: December 28, 2017 05:29PM

I've searched but can't seem to find a suitable answer. Im transplanting a 1966 power glide 140 into a 1965 power glide 110 4 door sedan. It seemed to be a straightforward switch until I realized the u-joint bolts are bigger on the 66 than the 65.I've checked my stash and I don't have 66 bolts/straps.Are the straps the same? if they are, what type of bolt should be used? Is it easier to swap the inboard yolk and go with the original 65 design?



Edited 1 time(s). Last edit at 12/29/2017 09:56AM by MattNall.

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Re: 1965 to 1966-69 u-joint switch
Posted by: vairmech ()
Date: December 28, 2017 05:32PM

Just go to your local FLAPS and buy as many as you need for the GM cars and trucks.

Ken Hand
Handy Car Care
248 613 8586

Vairmech@aol.com

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Re: 1965 to 1966-69 u-joint switch
Posted by: Seth Emerson ()
Date: December 28, 2017 06:38PM

Just undo the center bolts and pull the yokes out of your 65 PG differential and bolt them into the 66. They are absolutely interchangeable. Don't make it harder than it needs to be.

Seth Emerson

Check my new Performance Corvair Web site [www.perfvair.com]

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Re: 1965 to 1966-69 u-joint switch
Posted by: matchlessmo ()
Date: December 28, 2017 06:44PM

Seth , what about the the 66 transmission linkage compared to the 65 linkage how do I make it work. Thks


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Re: 1965 to 1966-69 u-joint switch
Posted by: TerribleTed ()
Date: December 28, 2017 07:11PM

You need the correct trans crossmember to match the trans you are using. The shifter hook up is the same.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
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Re: 1965 to 1966-69 u-joint switch
Posted by: steve c goodman ()
Date: December 28, 2017 07:17PM

65 up POWERGLIDES use same Xmember and linkage

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo 1965 Crown V8
1967 monza 110/4 1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC

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Re: 1965 to 1966-69 u-joint switch
Posted by: Matt E. ()
Date: December 28, 2017 08:56PM

Thank you all for the quick responses. Switching the yolks from the 65 to the 66 drivetrain seems the easiest and most efficient. Since I’ve never done this before, is it simply removing the center bolt and sliding out the yolk?

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Re: 1965 to 1966-69 u-joint switch
Posted by: steve c goodman ()
Date: December 28, 2017 09:03PM

There is a locking tab that must be straightened out first then undo bolt. Torque bolt and bend locking tab back again. Grease/lube the shafts of correct yokes to ensure lubrication on seals.

If you gave your location there might be someone close to you with the bolts/straps you need. To me if you had the correct fasteners it would be easier/quicker to put together.

Apology too: my autocorrect capitalized the word power glide for me, I was not shouting it, sorry all.

best wishes, Steve
Rear Engine Spec. Inc. Golden, Colo.

1962 spyder 3.0L turbo 1965 Crown V8
1967 monza 110/4 1968 monza 110/4
1971 amante gt 110/4
CORSA/RMC/PPCC



Edited 1 time(s). Last edit at 12/28/2017 09:10PM by steve c goodman.

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Re: 1965 to 1966-69 u-joint switch
Posted by: matchlessmo ()
Date: December 29, 2017 04:36AM

So fellas, I have a complete 1968 powerglide transmission and differential with cross member all attached that I want to install in my 65 convertible,all I have to do is replace the 68 yokes with 65 yokes and its a plug and play setup or do I need to swap the tv antenna on transmission with 65 setup. Thanks


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Re: 1965 to 1966-69 u-joint switch
Posted by: RobertC ()
Date: December 29, 2017 08:38AM

matchlessmo Wrote:
-------------------------------------------------------
>
> or do I need to swap the tv antenna on
> transmission with 65 setup. Thanks

tv antenna??? think auto correct bit you...

The U-joint straps are different - 66-69 are for 5/16" bolts; 65 use 1/4" bolts.

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Re: 1965 to 1966-69 u-joint switch
Posted by: Tom Z ()
Date: December 29, 2017 08:58AM

Matt-the u-joints you asked about are the same; keeping the "65" yokes with the "65" trans would help ID it tho..the '65' bolts and straps are for '65' only, 66straps and bolts are for 66-up differentials (stock)

Tom Z,,Rochester NY

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Re: 1965 to 1966-69 u-joint switch
Posted by: Wagon Master ()
Date: December 29, 2017 09:21AM

I think stated another way on the yokes, if you have the 1966 yoke bolts and staps, plus the side seals aren't leaking, go ahead and use the diff. as is. Keep your 65 diff. all 65 and the same with the one your installing. Yes you'll have 1/4" bolts on the outer yoke and 5/16" bolts on the inner but so what.
Not positive on the differences on the trans. bellcrank but I think the rod from it to the carb. crosshaft changed too.


'64 Monza Coupe 140 4 speed
'61 700 Lakewood 95 4 speed
'69 Monza Convert. 140 Auto.

Been aircooled since 1973
Northwest Ohio

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Re: 1965 to 1966-69 u-joint switch
Posted by: RobertC ()
Date: December 29, 2017 10:18AM

Wagon Master Wrote:
-------------------------------------------------------
> I think stated another way on the yokes, if you
> have the 1966 yoke bolts and staps, plus the side
> seals aren't leaking, go ahead and use the diff.
> as is.

The OP stated in his first post that he does not have the 66 bolts / straps.

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Re: 1965 to 1966-69 u-Yoke swaps?
Posted by: RobertC ()
Date: December 29, 2017 10:30AM

I should add that you need to make sure the bolts used in 65 yokes are grade 5 (or 8) and not "soft" valve cover bolts.

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Re: 1965 to 1966-69 u-Yoke swaps?
Posted by: Wagon Master ()
Date: December 29, 2017 11:07AM

My bad......never mind. Research does show the trans throttle pivot for pg being the same for 65-65 and 67-69. So you should be good there. Swap yokes, inspect side seals, and go.

'64 Monza Coupe 140 4 speed
'61 700 Lakewood 95 4 speed
'69 Monza Convert. 140 Auto.

Been aircooled since 1973
Northwest Ohio

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Re: 1965 to 1966-69 u-joint switch
Posted by: matchlessmo ()
Date: December 31, 2017 07:26AM

Ok fellas, I'll try this again, I have a complete 1968 powerglide transmission and differential with cross member all attached, I want to install in my 65 convertible,all I have to do is remove the center bolt on 68 yokes and replace them with 1965 yokes correct to make everything 1/4 bolts, but what do I do with the throttle shaft on the 1968 transmission setup, since it is different then the 1965 throttle shaft, or will it hook up to the 1965 linkage. Thks Happy New year👍


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Re: 1965 to 1966-69 u-joint switch
Posted by: RobertC ()
Date: December 31, 2017 07:34AM

matchlessmo Wrote:
-------------------------------------------------------
> Ok fellas, I'll try this again, I have a complete
> 1968 powerglide transmission and differential with
> cross member all attached, I want to install in my
> 65 convertible,all I have to do is remove the
> center bolt on 68 yokes and replace them with 1965
> yokes correct to make everything 1/4 bolts, but
> what do I do with the throttle shaft on the 1968
> transmission setup, since it is different then the
> 1965 throttle shaft, or will it hook up to the
> 1965 linkage. Thks Happy New year👍

Do not know of any difference in the swivels / bushings on the accelerator linkage.

I would recommend that you do the accelerator linkage adjustment (swivel at the TV lever (trans) and swivel at the cross shaft) to make sure that it returns to idle and achieves WOT.

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Re: 1965 to 1966-69 u-Yoke swaps?
Posted by: Lane66m ()
Date: December 31, 2017 08:07AM

I would leave the 68 yokes in your 68 transaxle and use the larger hardware as is. Unless you are really trying to make it period correct in your 65, but it appears you are not. The 5/16 bolts are stronger. Why go through all the work to swap the yokes when they will mate to your existing driveshafts using the better bolts and straps?

Down the road when you rebuild the rear axle bearing assemblies, you can have the stub axle yokes swapped out with 66 or later yokes or your stub axle yokes machined for the larger bolts.

I had several 65 yokes machined at my place of work to ensure I never run across a 65 yoke in my supply. I have lots of straps for both setups.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1966 Corsa Turbo Coupe, 180 hp 4 Spd
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2015 GMC Sierra SLT Crew Cab
1968 Camaro SS Coupe 350 CI 295+ HP PG
1947 Farmall A tractor 15 hp


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Re: 1965 to 1966-69 u-Yoke swaps?
Posted by: matchlessmo ()
Date: December 31, 2017 09:03AM

Thk lane66m, I have a set of rebuilt 1965 rear bearing housing that I am installing , but I might try your suggestion of using the 5/16 bolts on the inner shaft , I picked up a complete 1968 powerglide transmission/differential package with 35,000 original miles.


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Re: 1965 to 1966-69 u-Yoke swaps?
Posted by: Lane66m ()
Date: December 31, 2017 09:07AM

That's a good deal on the package. You rebuilding your driveshaft also. Make everything almost good as new.

Al Lane
Ellabell GA

1966 Monza Coupe, 110 hp, 4 Spd
1966 Corsa Turbo Coupe, 180 hp 4 Spd
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
2015 Chevrolet Malibu 2LT
2015 GMC Sierra SLT Crew Cab
1968 Camaro SS Coupe 350 CI 295+ HP PG
1947 Farmall A tractor 15 hp


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