<VV> 61-65 4-speed front mainshaft bearing oiling

[Hugo Miller]

I'm no expert on Corvairs, but if it were my gearbox I would pop both 
seals off the bearing. They are only there to keep dirt out and any 
pre-lube in, but I'm sure there will be more than enough oil finding its 
way from the gearbox.


On 2018-11-01 15:16, Doug Mackintosh via VirtualVairs wrote:
> I know there are some smart folks out there. Does anyone know how the
> front mainshaft bearing gets lubricated on a 61-65 4-speed
> transmission. Clarks includes instructions with the bearing to leave
> the rear shield on the bearing, only removing the front shield to
> expose it to oil. I have not been able to figure out for sure how the
> factory did it; the front bearings I have pulled out of the
> transmissions I have rebuilt have no shields, but I don't know that
> they were unmolested before I got to them.
> It looks to me that the only source of oil to the front of the
> bearing (other than general sloshing and splashing of oil through the
> small hole near the bottom of the front cover cavity) is the path
> through the 3-4 synchro hub slots, across the thrust face groove on
> the front of that hub, axially along the clutch gear needle bearings,
> between the clutch gear / input shaft spline interfaces, and out the
> end of the clutch gear into the front cover cavity.
> The normal oil level (not accounting for whatever level increase
> results from pumping from the differential during operation) is
> slightly below the bottom of the bearing, so it will not be bathed in
> gear oil.
> It seems to make sense to me to leave the shields off so normal
> splashing and sloshing within the transmission can bathe the rear 
> side
> of the bearing in oil (which is apparently how the rear bearing is
> lubed as it has a shield on the rear but no shield on the front 
> facing
> the inside of the case).
> Anyone know how this works? What do you guys do with the front
> bearing shields?
> Thanks!
> -- Doug Mackintosh Corsa member since 1996 Corsa/NC member since
> 1996, Virtual Vairs member Corvair owner 1969-1971 and 1996-on
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