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3886 Posts in 1208 Topics- by 2248 Members - Latest Member: jaydeb1949

May 23, 2012, 06:39:41 PM
Maintenance IssuesTR2 - TR31957 TR3A Shift Knob Thread Size
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Author Topic: 1957 TR3A Shift Knob Thread Size  (Read 724 times)
TS252
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Posts: 5
« on: April 12, 2008, 01:46:18 AM »
Anyone know the shift knob thread size for 57 tr3a?  I think it might be whitworth but not sure.  none of my thread gauges fit.  thanks,
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bobhustead
Jr. Member
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Posts: 53
« Reply #1 on: April 14, 2008, 01:18:18 PM »
I cannot be sure of the year of the transmission I have, but I doubt any change. The Moss catalog, fall/winter 2007 shows the same screw on knob from TR2 TS2877 to TR3A TS50000. After brushing the threads on the lever, I find that the 32 pitch thread guage from a tap/die set fits the threads, and that a 7/16 diameter guage will go while a 27/64 will not go. Looks like 7/16-32 to me.

Bob Hustead 
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bobhustead
mike_shoe1
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Posts: 7
« Reply #2 on: April 25, 2008, 12:09:59 PM »
Confirming my 1957 TR3 has a 7/16-32 thread, I purchased a die and it works wonderfully.  good luck
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