Chev 4 speed rebuild

[Perry Kitson]

Rob/Mike,
Surely you can't be poking fun at the pinnacle of automotive engineering? I have always understood that all that was needed during a Ford rebuild was a tape measure and a rather large hammer.
Phil,
I currently just have the rear cover off exposing the rear countershaft and output shaft bearings. The countershaft roller bearing has .003" play between the shaft and bearing. I am replacing the rear output shaft bearing as it is easy to do now. I am on a bit of a tight schedule as I want the truck ready for June 2 D-Day parade here in London, and may pull the transmission apart this fall instead of now.

[Perry Kitson]

Phil,
Did you measure clearance between bearing 4.422 and the shaft on disassembly? If they were replaced, did you get tighter fits?
It is the roller bearings wear on the shafts I am thinking of.

Perry

[Phil Waterman]

Hi Perry

Did I measure the play as with dial indicator? No, did I feel for play yes and there was not movement that you could feel, in that lower cluster (where the two 4.422 bearings are use) . But what I can remember spending more time feeling for roughness while turning.

When I got the NOS transmission all of the preservative inside had dried out so the whole transmission had to be cleaned in particular the bearings, lots of hot water and degreaser. But at one point I had the new transmission and the original transmission apart on the bench so I got a real chance to feel for difference in play. (Yes I was very careful not to mix any parts.)

Where I did find play was around 4.352 needle/cage bearing, earlier with C60S, that bearing and shaft had to be replaced (see http://www.canadianmilitarypattern.c...ansmission.htm ) because it started to chatter. The top couple of photos show how I pull the transmission, with a bar for and aft in the cab and lower it out the bottom, I've found this easier than trying to support/lift it from the bottom.

I will go back through my notes and photos to see if I have anything that might be of more help.

Cheers Phil