OK tranny gurus! Give me your thought here.
I always check the end play of the gear clusters as they came from the factory before I remove them from the case - call me anal.
So here they are with the tail cover removed:
Basically, you need to measure the height of the gear cluster from the case mating surface; then measure from the case mating surface to the bottom of the well that the cluster fits into. Subtract these two distances and then add a shim to the bottom of the well to get it within spec.
Here's my dial indicator set up:
Zero the Dial indicator:
Carefully move the setup to the case cover. Then measure from case to bottom of well (it still has the stock shim in place from the factory):
Note the dial indicator reads 0.075" (hand moved CCW):
I measured the primary, secondary and reverse clusters at least twice each and got the following:
P: 0.015"
S: 0.075"
R: 0.025"
The shop manual says the end play should be:
P: <0.0024"
S: <0.0024"
R: 0.0016" - 0.0039"
I'm thinking this has got to be a type-o. It has to be off by a decimal point. 24/10,000 is thinner than a sheet of paper! If I am right, it appears P & R are in spec and S is out of spec.
If the manual is right I need a 0.0726" shim for S. I checked the available shim thicknesses with Mazda and the thickest is 0.043". The manual specifically says "use only one shim - do not stack shims"
Wadaya think?
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