NM 521

[Crashtd420]

13 minutes ago, mainer311 said:

Mike already said 5 speed 4x2. My guess is 620’s and 720’s from mid 70’s onwards. Pretty sure even D21’s have the H190.

 

A bunch of good shit found here:

http://datsun1200.com/modules/mediawiki/index.php?title=H190

The d21 does but you need to be careful.... I think the 4x4 has a different spline count...

[thisismatt]

1 hour ago, d.p said:

Lol thanks @datzenmike and I’d wish ill will upon @thisismattbut he already living in BFE hell.  
 

and I just searched r190 Datsun and that was the first link lol.   And what the difference between r180 and r190 if they’re both 3.9 ?
 

 

Thanks man 😩

[datsunfreak]

FWIW, a 510 wagon has 3.89 gears also, and is an H190. Don't know if that's any easier to find, but thought I'd mention it...

 

I believe the whole rear end is the same width, just wrong wheel bolt pattern. Came very close to swapping one into my truck, but didn't want to hassle with converting the front to 4 lug also...  😄

Edited February 3, 2022 by datsunfreak

[datzenmike]

2 hours ago, d.p said:

Lol thanks @datzenmike and I’d wish ill will upon @thisismattbut he already living in BFE hell.  
 

and I just searched r190 Datsun and that was the first link lol.   And what the difference between r180 and r190 if they’re both 3.9 ?
 

 

 

The R 190 was a racing option for the Z car. Its 190-180 = 10mm larger diameter ring gear so marginally stronger as the cut gears will have more metal in them specially helpful if running more teeth on the ring such as a 4.625 or 4.875. I think the 190 might fit the R-180 case... but either way this is an independent rear suspension IRS and your truck is a solid axle. The numbers are the ring gear diameter and indicate a relative strength. B-210s are H-145 and H-150 My 710 is an H-165 because light car. The Pathfinder and D21 with VG30 engines are H-233.

 

Here's you H-190 'solid axle' to compare to the R-180. Apples and oranges.

 

 

[wayno]

This is what a H190 gearset looks like D.P, it is actually a 3.9(3.89), but some of the ring gear teeth have rust on them, I would use it for myself as if it wore out fast I would just change it out for another set, but I would not send this gearset across the country.

I believe a 1981/1982 Datsun 720 with the Z22 has 3.9(3.89) gears, I know all my 720 diesel trucks had them, there is nothing in the wrecking yards around here right now, just one 1985 and it kinda looked like a 4wd in the photo in which case it would have a C200 rear axle.

 

 

 

Edited February 3, 2022 by wayno

[mainer311]

2 hours ago, Crashtd420 said:

The d21 does but you need to be careful.... I think the 4x4 has a different spline count...

yeah, most of them had the 223

[datzenmike]

Only 4 cylinder and 2wd had the H-190. There was a rare LSD option H-190 from '88 -'91?? I think

[datzenmike]

The '80 2wd also had 3.889, pretty much all Z22 standards did, all diesels did and the only '83 and up gas engine was the Z24 King Cab standard.

[d.p]

@wayno why not send it my way?  Would it drop right in? 

[mainer311]

2 hours ago, datzenmike said:

Only 4 cylinder and 2wd had the H-190. There was a rare LSD option H-190 from '88 -'91?? I think

Not quite. Mine was 4x2 with the KA24 and it had the 223.

[datzenmike]

I stand corrected there were H-233 but only with LSD on some KA engines through '93 after this all H-190.

[wayno]

3 hours ago, d.p said:

@wayno why not send it my way?  Would it drop right in? 

 

I said why, it has rust on the ring gear and feels rough in places, that is fine for me as I have others(not the same gearing), but getting it across the country is expensive and if it fails I do not want to deal with it, and yes it would drop right in.

 

I just searched the wrecking yard inventory and there are only hardbodies and they all likely do not have 3.89 gearing and I do not want to drive 50 miles there and 50 miles back to find out.

 

[wayno]

6 hours ago, datzenmike said:

Only 4 cylinder and 2wd had the H-190. There was a rare LSD option H-190 from '88 -'91?? I think

 

I think it is to 1993 as that is the year truck I found that H190 LSD in, I was stunned when I dropped it out of the axle housing, I didn't believe it was an H190 until I put it in a 620 axle in the next row, that day was an amazing day, I found a H190 LSD, a 521 windshield, a good C200 carrier to fix my dually axle, and there was one more hard to find thing I cannot recall right now.

[datzenmike]

Good on you wayno.

[d.p]

13 hours ago, wayno said:

 

I said why, it has rust on the ring gear and feels rough in places, that is fine for me as I have others(not the same gearing), but getting it across the country is expensive and if it fails I do not want to deal with it, and yes it would drop right in.

 

I just searched the wrecking yard inventory and there are only hardbodies and they all likely do not have 3.89 gearing and I do not want to drive 50 miles there and 50 miles back to find out.

 

Can I replace the ring gears and or have it serviced to be like new?

[thisismatt]

9 minutes ago, d.p said:

Can I replace the ring gears and or have it serviced to be like new?

You would have to find a matched set. Not sure if they are still available, but if so probably pricey, and have to set it all up...press out/in the pinion, set clearances, lash, etc. Way easier to find a complete one and swap the whole pumpkin like wayno suggests.

[Oilspot]

1 hour ago, d.p said:

Can I replace the ring gears and or have it serviced to be like new?

The ring and pinion is the hard to find part since they're not available aftermarket. 

You already have the correct splined third member in your truck. So you have two options.

 

Find a complete 3.83 third member for an easy bolt in , or......

 

Find a 3.83 r&p and have your exsisting third member built.  

Edited February 4, 2022 by Oilspot

[d.p]

Would any of these work?  And sorry for shitting in/on your thread @Oilspot hopefully this helps someone else in the future.

 

[Oilspot]

15 minutes ago, d.p said:

Would any of these work?  And sorry for shitting in/on your thread @Oilspot hopefully this helps someone else in the future.

 

🤣 No sweat man. I was thinking about getting in touch with a administrator to change the name of the thread

[thisismatt]

1 hour ago, d.p said:

Would any of these work?  And sorry for shitting in/on your thread @Oilspot hopefully this helps someone else in the future.

 

Not enough info

[wayno]

10 hours ago, d.p said:

Can I replace the ring gears and or have it serviced to be like new?

 

I am going to take this to your thread, and I am going to be blunt/honest, and you will need to be honest with yourself.

[mklotz70]

The diff out of a roadster should be 3.89 which is what I run in my wife's 521 behind a dogleg.  I love that gearing.  If you're not familiar with swapping the spider gears, I did a vid a LONG time ago. It's not very good at all, but it will show you what's involved.

 

 

[d.p]

Thanks @mklotz70 but wayno is sending me a 3.70 so need to swap. BuI @mainer311this should work for you no?  

[mainer311]

2 hours ago, d.p said:

Thanks @mklotz70 but wayno is sending me a 3.70 so need to swap. BuI @mainer311this should work for you no?  

Yeah, if I had an extra roadster diff kicking around…

[datzenmike]

Other H-190 car differentials.....

 

The 510 wagon is more common and came with 3.70 in the manual and 3.889 in the automatic.

 

The 610 manual wagons had 3.889 for the '74 with the new L20B and 3.70 for manual and automatics after.

 

The '82-'83 S110 200sx automatics only were 3.70 H-190 (the manuals were 3.545)

 

All 810 wagons were 3.70. Maxima wagons were 3.545 and lower.

 

The one year only '74 '84 S12 200sx had 3.70 manual and 3.889 automatic H-190* This is the only car differential with truck side gears!!!!