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View Full Version : TR4/4A Difference in Clutch Shafts 4A?



karls59tr
08-01-2012, 02:46 PM
I have a good clutch shaft in my parts bin that does not have the groove at the end for the locating bolt but otherwise is identical to the shaft in my TR6 trans. Moss lists the shafts for 4A and 6 as the same part #. Is the shaft I have without the groove the later shaft. Moss has the early shaft and locating bolt as N/A so maybe it's not necessary to have the grooved shaft and I can use the one I found. maybe it was determined that the locating bolt wasn't necessary?

TR3driver
08-02-2012, 08:22 AM
The locating bolt was eliminated during the TR4 run. If your TR6 box has one, it was added by someone else.

The later shaft will work fine in earlier gearboxes, but I would recommend drilling it for the grease fittings. One of the Buckeye Triumphs articles describes the process.

Or you could drill the housing & bushing, as I did for my Stag (which didn't have room for the zerk on the shaft end):

https://i258.photobucket.com/albums/hh260/TR3driver/Stag/ClutchshaftgreasenippleonStag.jpg

karls59tr
08-02-2012, 08:36 PM
Thanks for the info Randall. I'll check out the Buckeye sight. Is that "header wrap"protecting the fuel line that I see in the background?

TR3driver
08-03-2012, 04:44 AM
Is that "header wrap"protecting the fuel line that I see in the background?

I believe that was woven fiberglass sleeving, to protect some wires. Seems like maybe it was the smaller wires to the starter, which I later tucked back above the gearbox to get them farther away from the exhaust. (The Stag has a plug in that area, where the starter interlock connects to the gearbox on cars with automatic transmission.) But to be honest, I don't recall for certain.

https://www.mcmaster.com/#819

karls59tr
08-03-2012, 08:04 AM
Good to know about the high temperature capabilities. The PO had a non Triumph exhaust system Installed on my 4A. One of the pipes actually touches the bottom of the trans. I think the hot exhaust pipe could be conducting heat into the trans oil so I am looking for something to slide in-between the trans and the pipe rather than trying to relocate the pipe. That sleeve material might do the job.