Hmmm, this is getting confusing. I've spoken to one manufacturer who says
it is measured prop-shaft flange to prop-shaft flange fully compressed.
Then another says to take the prop-shaft off and measure gearbox flange to
axle flange, then he will make one to suit. He said he would give it a
sliding joint of quote 1 3/4" to 2" and it would run in about the middle of
that unquote. Now whilst I would be happy if the maximum compression left
1/8" to go, I certainly wouldn't be happy if the maximum extension only left
1/8" to go! I tried to get a parts supplier to measure one for me but all
he would do is quote 31 1/8" for the 4-synch gearbox (correct) but didn't
know how it was measured!
The more I think about it flange to flange of the prop-shaft fully
compressed makes the most sense ... but then when did common sense rule in
our cars? We need more examples or a definitive statement of how it is
measured, I find it difficult to believe that all of Bob's should be the
same but incorrect.
PaulH.
----- Original Message -----
> But as to the measurements: when I removed mine I did not know where
> to measure. The substitute from the parts car was same length. Mine is 72
> GT with OD, and the parts car is 73 with OD, so they were either both
> correct or both incorrect. The new one is same length as both the old
> ones when all are fully compressed, and none was any of the quoted
> lengths. There may be a measurement protocol for driveshafts?
> Hi Paul,, your second line is interesting, that would lead you to say
> that then the dimensions given for sizes don't mean anything since we
> can not figure out which one goes where.??
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