M5R2 Mazda 5 speed

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Apr 12, 2007 | 06:34 PM

Ernieweaslefat

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M5R2 Mazda 5 speed

Anyone know what the endplay tolerance is for this transmission? I took it apart because I thought that the input bearing was toast but later realized there was some wear on the rear bearing retainer plate on the mainshaft part. I cleaned it up by taking about .015" off. So I made some shims up to take care of the material I removed. I see there are shim kits available but am not sure how much preload should be on the input bearing or do I just make it so there is no endplay at all?

Apr 12, 2007 | 07:33 PM

F150xlt

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From: Baltimore

Here's a link that shows a M5R2 for the T Bird. The method to determine the end play shim for the input shaft and counter shaft is the same. (The T Bird trans. does use different shift linkage).

http://www.mn12performance.com/mn12h...mbly-menu.html

The shim for the input shaft is determined by measuring the depth in the front bearing retainer plate. Then measure the height the input shaft bearing outer race protrudes above the casting. Subtract this measurement from the first measurement. Add .002-.006 inches. This will equal the required shim thickness.

Not sure why there would be wear on the rear center support bearing retainer for the output shaft. The outer bearing race doesn't move.
It does protrude about .079 inches above the case surface.
The counter shaft bearing protrudes about .039 inches above the case surface.

Last edited by F150xlt; Apr 12, 2007 at 07:39 PM.