Corvair DiagramCorvair Photo
Corvair Center
home forum corvairs calendar links Corvair Podcast
California Corvairs
Clarks Corvair
Clarks Corvair
“CORSA"



Chevy Corvair License Plate
Chevy Corvair Chrome Wheel
Continuing Transvair (mis)adventures
Posted by: mattlockwood ()
Date: May 19, 2020 06:50PM

So- the bolts securing the transvair adaptor to the PG sheared off at a stop lite. This was my first test drive after a fire caused by a split in a metal(!) fuel line that melted all my wiring and destroyed my alternator.

Question- the sheared bolts remain in the yolk on the drivers side of the dif. Looks like about a 1/4 bolt that secures the yoke to the dif. Clark’s sells yokes, not too expensive.

Is it just a matter of removing the Big bolt and pulling the yoke?

The adventure continues.....

Matt

Re: Continuing Transvair (mis)adventures
Posted by: joelsplace ()
Date: May 19, 2020 07:57PM

That's it. You can't just extract the bolts? What caused the failure?

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

Re: Continuing Transvair (mis)adventures
Posted by: mattlockwood ()
Date: May 19, 2020 08:16PM

I may try to extract, but first I have to remove the yoke, or pull the engine, which is not fun on a VW bus. Would rather remove the yoke.

So if I’m understanding you correctly, it’s a simple procedure to remove the yoke?

Thanks

Matt

Re: Continuing Transvair (mis)adventures
Posted by: MattNall ()
Date: May 19, 2020 09:10PM

If you remove the axle....the yoke should slide out. If not it's just the one bolt in the center holding it in.

MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

Re: Continuing Transvair (mis)adventures
Posted by: mattlockwood ()
Date: May 19, 2020 10:14PM

MattNall Wrote:
-------------------------------------------------------
> If you remove the axle....the yoke should slide out. If not it's just the one bolt in the center holding it in.


Thanks for the clarification. What initially looked and sounded like a big deal may not be after all

Re: Continuing Transvair (mis)adventures
Posted by: joelsplace ()
Date: May 20, 2020 06:38PM

No big deal at all. The late model uses a center bolt and the early model does not because it slips in and out for the swing axle.

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

Re: Continuing Transvair (mis)adventures
Posted by: mattlockwood ()
Date: May 20, 2020 09:38PM

Thank you.

Came right out. Easy.

Took the yoke to my machine shop guy to drill out the sheared bolts and he recommended I’d be better off just buying one from Clark’s. Problem solved for $17 plus shipping.

smiling smiley

------------------------------------------
1970 VW Bus- converting to a 110hp w/a PG

Re: Continuing Transvair (mis)adventures
Posted by: Vern in Bend ()
Date: May 21, 2020 09:25AM

Matt, if those bolts were 1/4", they were too small.

Only '65 yokes used 1/4" bolts. In '66, GM changed to a slightly beefier yoke with 5/16" bolts.

The Transvair adapters came with 5/16" bolts, and instructions to use 5/16 yokes or rethread 1/4" yokes to 5/16".

It's difficult even for a machine shop to rethread the 1/4" yokes and have the bolt centers come out exactly where they have to be for the flat-head bolts to seat tightly in the recesses of the adapter, as they have to be in order to have a solid assembly. Any 'working' of these pieces will lead to failure of the bolts.

I hope your new yokes are the later style as they need to be.

Regards, Vern

Bend, Oregon

'64 Corvan, daily driver - 45 years
'64 Rampside, personal driver - 27 years
'67 Monza Cpe, original owner - 33k miles
'80 Vanagon stalled project - 2.8 Corvair & T5 5-speed
'81 Vanagon high-top panel van - Now with Subi EJ253 & Subarugears 5-speed

Re: Continuing Transvair (mis)adventures
Posted by: mattlockwood ()
Date: May 21, 2020 09:55PM

Hey Vern!

5/16th is correct, I was initially just guessing when I posted.

All is well, the adaptors are in good shape, a new later style yoke is on its way from Clark’s as well as the correct adaptor bolts.

Thanks!

Matt

------------------------------------------
1970 VW Bus- converting to a 110hp w/a PG

Sorry, only registered users may post in this forum.
This forum powered by Phorum.