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521 rear axle shims


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#1 DatEz

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Posted 27 December 2017 - 01:06 PM

Hey folks, I’m currently swapping the rear drums to disc brakes, but I noticed that when I pulled off my rear axles, one side had only three metal shims and the other side had about 6. Does anyone know what the correct amount on each side is and also where to buy new shims? I can’t find them online.

#2 datzenmike

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Posted 27 December 2017 - 01:10 PM

It's select fit. Some need more or less.


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#3 flatcat19

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Posted 27 December 2017 - 02:08 PM

Is this why every 521 bed every is not installed center?

You can't hang if your nuts haven't dropped...it's physics


#4 DanielC

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Posted 27 December 2017 - 02:10 PM

The shims are used to set the proper amount of free play in the axles. 

When putting the axles back into the rear axle housing, the first axle should have .012 to .035 of free play, in and out.

The second axle should have .0008 to .0059 of free play.



#5 thisismatt

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Posted 27 December 2017 - 02:15 PM

Is this why every 521 bed every is not installed center?

Jap crap economy pick-up :P
I'm your huckleberry.

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That's all, and that's no joke
These guys don't appreciate I'm broke

#6 wayno

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Posted 27 December 2017 - 02:17 PM

Leave them the way they are, they are set, do not mix the shims up either, they might not all be the same thickness.


 

 


#7 datzenmike

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Posted 27 December 2017 - 03:28 PM

Is this why every 521 bed every is not installed center?

 

Silly gato, that's from drifting.


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#8 DatEz

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Posted 27 December 2017 - 03:42 PM

Ok, I left them all on the way they were when I took the axles off. But now I have fully installed the disc brake conversion and there is a ton of wobble/play. Was I supposed to leave some of the backing plate on to fill the gap? I had the entire plate cut off.

#9 wayno

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Posted 27 December 2017 - 04:04 PM

Ok, I left them all on the way they were when I took the axles off. But now I have fully installed the disc brake conversion and there is a ton of wobble/play. Was I supposed to leave some of the backing plate on to fill the gap? I had the entire plate cut off.

 

Didn't you get directions with whatever kit you bought?

I am thinking the plate has the rear bearing in it, there is a bearing on the axle isn't there, the axle is still held in by the 4 nuts on the studs, right?


 

 


#10 DatEz

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Posted 30 December 2017 - 05:20 PM

Well I bought the kit off a guy who already installed it but never used it because he decided to convert to 5 lug. But I also didn’t have my differential in because I was waiting for my gasket that arrived today. Now to install the new diff gasket, do I NEED to have a dealer of some sort applied? If so, would clear rtv work?

#11 Charlie69

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Posted 30 December 2017 - 09:00 PM

Any idea who made the disc brake kit?



#12 Crashtd420

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Posted 31 December 2017 - 04:37 AM

Any idea who made the disc brake kit?

Pic would help..... I'll bet it could be identified by someone here. .

#13 Stoffregen Motorsports

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Posted 31 December 2017 - 09:53 AM

Well I bought the kit off a guy who already installed it but never used it because he decided to convert to 5 lug. But I also didn’t have my differential in because I was waiting for my gasket that arrived today. Now to install the new diff gasket, do I NEED to have a dealer of some sort applied? If so, would clear rtv work?

No, you don't NEED a gasket sealer, but why risk it? I use black or grey RTV on diffs. Mainly "the Right Stuff" RTV because it's tough as nails. And it's black so it won't stand out against the black paint on the axle housing.