<VV> Clutch Linkage

[Joel McGregor]

I've seen lots of bad input shaft bearings diagnosed as bad throw out bearings.  You can tell the difference in when it makes the noise.  If the car isn't moving and it makes the noise in neutral but doesn't make the noise in gear then the input shaft bearing is probably bad.  A throw out bearing will make the same noise in neutral as in gear.  I've only had to replace one obviously bad input shaft bearing on a Corvair but it was in a transmission I was rebuilding for my Greenbrier that hadn't been used by me so I don't know what it sounded like.
I call it an input shaft bearing because that's what the corresponding bearing is in those oddball front engine cars.  I realize it's the bearing around the gear in the front of the trans that the input shaft drives.  There are also needle bearings on the inside of that gear that could cause trouble.  Early Corvair 4-speeds (61-65) are pretty easy to rebuild.  I haven't done a late yet.
Joel McGregor
________________________________________
From: virtualvairs-bounces at corvair.org [virtualvairs-bounces at corvair.org] On Behalf Of Matt Nall [patiomatt at aol.com]
Sent: Friday, June 17, 2011 1:36 PM
To: jgreen at alum.mit.edu; virtualvairs at corvair.org
Subject: Re: <VV> Clutch Linkage

A few weeks ago, the clutch on my 1965 / 110 became momentarily stuck
on the floor. This has happened several times. Also, when depressing
the pedal, I hear a grinding noise and feel roughness. I believe the
noise is coming from the rear of the car.

I thought the problem was in the linkage cross shaft. Greasing didn't
help so I took the cross shaft apart, cleaned it, replaced the (nylon)
bushings, regreased, and then put everything back together. With the
car still on jackstands, the noise and rough operation remain.


John Green