Hi all
I’m in the process of making a copy of the Porsche tool - P259.
This tool is used to measure the "BackLash" of the Ring and Pinion gear of the 915 gearbox.
I have already made a clamp for locking the Pinion Shaft.
I used a cheap socket that I slotted down one side and the welded it to a piece of steel…
An M6 bolt is used to lock it onto the big nut at the end of the Pinion Shaft. (zero play)
It’s a bit ugly but it’s very similar to the P Tool shown in the pictures.
I have also sourced an appropriate washer and bolt for locking the axle flange to the differential.
I’ve searched here and found a thread that states the 930 Turbo gearbox is measured at 92mm.
In that same thread it also states the Carerra is measured at 80mm.
However I also found in a different thread a measurement of 83mm for the Carerra.
~ 3mm doesn't sound like much but it would affect the final backlash measurement.
I'm assuming this measurement would be the same for all 915 gearbox made after 1977… (Probably the same for all 915s)
My car is a 1978 911 SC.
What I would like is to know for sure is the measurement shown in the picture bellow between the two red lines.
(The distance between the Gauge holder and the centre of the flange fixing bolt hole)
Thanks in advance…
