<VV> Bolt Size Question

[James Davis]

The 1965 Corvair car's rear yokes used 1/4-20x1" grade #8 retaining 
bolts.  For 1966-69 the bolts were changed to 5/16-18x2".  These are 
special purpose small head, flange head (a typical 5/16" bolt would have 
a 1/2 " head.)  The different yokes used different style yoke straps.  
The 1965 yokes can be drilled and tapped to make them the same as the 
1966-69.   There were about 95,000  65 cars but only 40,000 66-69 cars 
made, so the 65 yokes are much easier to come by.  Only the very early 
coaches with the late model Corvair suspension came with the 65 style 
yokes.
Jim Davis



Bob Gilbert wrote:
> I am going to replace the rear wheel bearings on my Ultravan this year but
> to do that I need to determine the bolt sizes in the universal joint
> carrier.
>
>  
>
> The options are 1/4 inch and 5/16 inch. The vehicle is parked for the winter
> and in snow and the best I can practically determine until spring arrives is
> that the heads of the bolts are 7/16 inch.
>
>  
>
> I'm fairly certain that a 7/16 heads means the bolts are the 5/16 inch
> version. Can anybody confirm that please?
>
>  
>
> Thanks,
>
> Bob