FS5W71B right hand thread locknut

[docbainey]

Does anybody know who might have this for sale? It appears to be 'unobtainable on Algon'  according to Monty Python. OR does anybody know the thread size so I can have some made??

 

I guess I should have said 'main shaft' lock nut.

 

Thnx!

[datzenmike]

Most threads are right hand aren't they.? What does it hold on? Where is it located? Your post is rather vague on this.

[MikeRL411]

When you get your real needs determined, any hardware store or in extreme need McMaster Carr will fill your need.

[datzenmike]

Yes the mainshaft nut (I believe M27X1) on the earliest 71Bs used to sometimes back of resulting in loss of 5th gear. It was replaced with a nut with a shoulder so it could be tightened and staked. 

 

32354-A7400 was the old number

 

32354-E9803 is for a later maxima transmission.

 

 

Here is a picture of what I believe is a 720 transmission with the modified nut.

[Stoffregen Motorsports]

It's one of the most common failures of that era trans. The nut backs off creating all kinds of problems.

 

When I built one of those a week, I got sick of using a wrench on that nut, so I made a long socket, by cutting a Snap-On socket on the lathe and welding a piece of tubing in between. This allowed me to use a rattle gun on that nut. I made one for the stock 510 4 spd too.

 

After that, I started experiencing a major problem. The gears would bind and weld themselves together. Cause? When the nut was loose, it allowed the gear to walk back and forth creating a groove in the thrust washer and shortening the collar that the bearing rides on. If the washer was re-installed with the groove in the opposite side, it would cause the gear backlash to go away, thus no thrust, and then welded gears. I learned to either replace the washer or sand it smooth, or simply re-install it in the same direction as it came off. That's also when I started blueprinting those transmissions, checking and setting backlash in all the gears and also in the shifting stops.

 

That's a tale of caution, but to make sure it doesn't happen again, use red loctite on the threads and stake the nut in place.

[docbainey]

Good stuff Stoff!

 

The 32354-E9803 is left hand, I need the 32354-E9804, which is right hand.