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620 rear axle bearing info ?


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Even though it seems the bearings are seated there is a shit ton of play when I tightened.
It seems they do not want to go any further towards the race.
Is this taken up with the shims?
I noticed inside the chunk and on the axle ends are polished like a mirror.
Is that where the endplay I will be checking for be?

I do not want to put it back together wrong
I made this video to show what I am dealing with, I have never replaced rear bearings on any vehicle before now.
 

 

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I am in the process of using the dial indicator to set end play.
Is .005 going to be too loose on the first side?
Thanks for the numbers

My shims are steel, I had to put them in the secret sauce to clean off the rust.
I have extras from the other rear end.


 

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On 12/4/2021 at 11:39 AM, datzenmike said:

 Pick one side and shim till it is within 0.012" to 0.035". Go to other side and shim till you get 0.0008" to 0.0059"

 

0.005" may be a little small. I don't know how critical this is really. It's the other side that closes up the gap between the thrust block and the two axles ends.

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With the shims I have I finally got the first side  to .011, one ten thousandths tight ..?
That took several removals & re-configuring shims. They would be easier to measure if I had a dial caliper, instead of an antique.
When she is back on the road, I won't be making any long trips, so the ass end will get broken back in slowly.

My brain hasn't worked quite right since I had a hell of heart attack that comatized me for 5 days, almost 10 yrs ago,
double bypass, etc., so don't be surprised if I ask stupid questions.
 

Edited by Goemon
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On 12/6/2021 at 10:22 AM, Goemon said:

I am in the process of using the dial indicator to set end play.
Is .005 going to be too loose on the first side?
Thanks for the numbers

My shims are steel, I had to put them in the secret sauce to clean off the rust.
I have extras from the other rear end.


 

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whats the recipe for that secret sauce ? 🙂 

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  • 4 weeks later...

I can't tell you, that is why it's a secret.
I have been using it to clean the rust off of gas pump computers for 35 yrs.
Company Secret.
That and sandblasting and sometimes sauce then sandblasting on tough stuff.
I used it on my driveshaft along with wire brush & sandblaster for the ends




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At least GL-5 90w. More than enough protection.

 

I guess you could try a GL-5 rated synthetic but in my experience it might start leaking (just wetness) at the old pinion seal. If you have a new seal, probably ok. Theoretically better mileage from reduced friction but I bet it can't be proven on an H-190. The differential oil should be changed every 30k and I assume synthetic would have a much longer change interval, so there's that.

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90 weight would be correct for GA weather.
I replaced ALL the seals, outer grease, axle seals, Diff gasket and pinion seal.
I do not do a lot of driving, so I would prefer a good quality brand.
Any BRAND NAME suggestions for a Datsun?
Thanks

The pipe on the frame is there for keeping the tarp off the frame so water does not collect in between.
Pallets & concrete blocks to keep your bed off the ground.

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