M5R1 Mainshaft Endplay

[powderburner]

In the process of completing a rebuild on my M5R1 tranny. Does anyone have a spec on the endplay for the mainshaft. I can't find any info that gives me a number. Any help appreciated.

 

[bottledgt]

i dont have spec on that trans, but generally any manual trans should be .000-.005. basically as close to 0 as posible

 

[cocoasranger]

There have been a couple threads on this with the conclusion that on M5OD R-1 transmissions they all have some visible side play which is normal. The pilot bearing keeps the input shaft centered. You can search "Mazda input shaft play"
for specifics.

 

[bottledgt]

there shouldnt be much at all play though. it shouldnt flop around. ideally it should be very very minimal

 

[AllanD]

0.002" is "ideal"

Shooting for zero is difficult when the input bearing end-play
selective fit spacers only come on 0.003" steps

My current trans (not yet run) was set to a slight negative endplay
(slight "crush") on the bench.

From experience I know that a trans will ALWAYS loosen up 1-2 thousanths
within a couple hundred miles, and that "a little tight" is far preferable
to "a little loose" with tapered rollers.

I just wish the outer races were more positively located
in the case, because the rear bearing race "spinning" in
operation is responsible for the usual wear in the rear
bearing retainer.

AD

 

[bottledgt]

0.002" is "ideal"

Shooting for zero is difficult when the input bearing end-play
selective fit spacers only come on 0.003" steps

My current trans (not yet run) was set to a slight negative endplay
(slight "crush") on the bench.

From experience I know that a trans will ALWAYS loosen up 1-2 thousanths
within a couple hundred miles, and that "a little tight" is far preferable
to "a little loose" with tapered rollers.

I just wish the outer races were more positively located
in the case, because the rear bearing race "spinning" in
operation is responsible for the usual wear in the rear
bearing retainer.

AD

agreed..to tight is usually better in all aspects of life