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H190 Differentials (w/Pictures)


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#41 Anabolic620

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Posted 27 September 2015 - 05:17 AM

Ha! I'm glad to of found this thread. Thanks!

#42 Son_of_a_Datsun_Guy

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Posted 28 June 2017 - 12:40 AM

Okay, so I'm LSD hunting. Does anyone know if there was a definitive trim package that the mythical H-190 LSD came in?

 

If not I'm just going to have to junkyard hunt for one...


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#43 datzenmike

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Posted 28 June 2017 - 05:01 AM

It was an option on the Roadster and had car 23 spline side gears for the axles. Aluminum case

 

It was an option on the '88 through Jan '92 D21 Hardbody 2WD and four cylinder. All V6 were H-233. This would have truck 29 spline side gears, but car side gears could be swapped in. Steel case.


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#44 Son_of_a_Datsun_Guy

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Posted 28 June 2017 - 11:36 AM

Thank you! This helps narrow the search a lot, probably still going to need to hunt, but at least I have a year range to work with. 


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#45 datzenmike

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Posted 28 June 2017 - 03:33 PM

If the Hardbody look for thise years and 4 cylinder. On the back side of the differential 'bum' for a postage sized orange stamp saying LSD or USE LSD OIL. Take a rag with you.

 

Pathfinder--D-21conversion039Large.jpg


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#46 Tom1200

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Posted 28 June 2017 - 07:39 PM

A LSD diff that bolts into the housing for your wagon is not that hard to find, the down side is plan on paying $1200-$1500 for one. I found a deal on one for the 1200 coupe I race and it was still $1200. You can try roadster sites like 311s.org etc. there's lots of info on the net about swapping side gear on the truck diff.

I'd strongly encourage you to do you're research. The prices for the 23 spline diffs are getting steep and replacement parts getting scarce. If you have acces to a diff shop that does work for reasonable prices (read takes pity on poor Datsun guys) than having the truck axles redrilled for the bolt pattern you need may be an option.

The days of $600 units are gone..........sigh.

#47 Son_of_a_Datsun_Guy

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Posted 29 June 2017 - 08:45 PM

A LSD diff that bolts into the housing for your wagon is not that hard to find, the down side is plan on paying $1200-$1500 for one. I found a deal on one for the 1200 coupe I race and it was still $1200. You can try roadster sites like 311s.org etc. there's lots of info on the net about swapping side gear on the truck diff.

I'd strongly encourage you to do you're research. The prices for the 23 spline diffs are getting steep and replacement parts getting scarce. If you have acces to a diff shop that does work for reasonable prices (read takes pity on poor Datsun guys) than having the truck axles redrilled for the bolt pattern you need may be an option.

The days of $600 units are gone..........sigh.

 

I've been hunting for a way to avoid needing to find a competition roadster diff. I think the truck axles sound interesting, just concerned about what gears I could find and what the actual LSD's break away point it like. I autocross, so I'd like it to actually be kind of low, probably lower than what the trucks were built with. 

 

I'm looking -- at the same time as searching for a Nissan unit -- at other options like RX7 axles (first gen GSL-E) and Corolla GTS units (AE86). Both of those have more "reliable" availability since you can search for specific years and trims to get the axles. Downside is they're both small, I believe the Mazda is a 7" housing and the Toyota is a 6.75" or something like that. 

 

While I only make about 140hp right now, I'm probably going to three link this axle once I find it and so I would like the unit to be strong enough to take around 250-300hp, if I ever feel like getting there. However, anything American or the H-233 (I suspect) will be HEAVY, which I would really like to avoid -- add lightness and all that.


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#48 datzenmike

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Posted 30 June 2017 - 05:46 AM

The H-233 is a massive 4 pinion but you could trim weight somewhere else. This weight IS over the drive wheels so there is that. The D21 Hardbody or Pathfinder axle is quite wide and would need narrowing but they can also be found with rear disc brakes. The early LSD units come in 4.375 and 4.625. The H-233 is slightly larger than the Ford 9".


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#49 Stoffregen Motorsports

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Posted 30 June 2017 - 06:26 AM

I've been hunting for a way to avoid needing to find a competition roadster diff. I think the truck axles sound interesting, just concerned about what gears I could find and what the actual LSD's break away point it like. I autocross, so I'd like it to actually be kind of low, probably lower than what the trucks were built with. 

 

I'm looking -- at the same time as searching for a Nissan unit -- at other options like RX7 axles (first gen GSL-E) and Corolla GTS units (AE86). Both of those have more "reliable" availability since you can search for specific years and trims to get the axles. Downside is they're both small, I believe the Mazda is a 7" housing and the Toyota is a 6.75" or something like that. 

 

Breakaway pressure is adjustable.

 

AE86 diff is puny in comparison to a H190, so I'd shy away from that.



#50 G-Duax

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Posted 30 June 2017 - 01:05 PM

On my H190 2-way from a Cedric sedan with the large pinion cast iron housing, I removed the 2 spring plates, and added additional clutch disks to make up the stack height.

So now there is no appreciable break away torque until I apply pressure to the pinion, then it locks up hard :)

 

Makes for a really nice street LSD. No squirrlyness on slippery streets, but when I want traction, it's there, just by putting power to it.

 

By the way, the R200 Nismo clutch disks are identical to the Nissan OEM.

In fact, the only difference between the Nismo, and OEM 2-way, is that the Nismo has 4 additional holes machined into the body for additional oil circulation.  Otherwise, they are identical.

 

http://datsunminitru..._topic2939.html


"All of a sudden it started making noise, then started losing power. I limped the car home and tried to get it up the driveway, the engine just died."

 

Why do people do this?

A $100 tow bill is never as much as the extra damage you cause by trying to "limp the car home".

 

Don't be that person !


#51 Tom1200

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Posted 03 July 2017 - 08:57 PM

 A couple of notes:

 

You can go to the wrecking yard and pull a Explorer (Ford 8.8) with LSD; the left side of the axle housing is longer, what people do is pull a passenger side axle out of another housing (so you have two passenger side axles), shorten the left side around 2.8 inches and then install the right side axle in the shortened left side housing. the result is a housing that's around 56" axle flange to axle flange.   As mentioned weight is the issue; the Ford 7.5 axles are around 150lbs and the 8.8s are around 175-180lbs.  Even using alloy axles and aluminum rear cover would help but I'd still expect them to be 40-50lbs heaveir than the H190. The Ford axle would never break but yes they are heavy.

 

You could use a Speedway Engineering (light and strong)  or something similar but that will set you back anywhere from $2500-$3000

 

Tom



#52 DaBlist

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Posted 04 July 2017 - 06:25 AM

There were aftermarket aluminum center sections for the Ford 8".

 

Should be lots of LSD and gear set options


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#53 Mazda Jon

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Posted 04 October 2017 - 10:07 AM

I have some H190 parts for sale including 2 Nissan LSD's.  One is complete, the other needs to be setup.

 

https://www.dropbox....90 LSD.JPG?dl=0

 

http://prodracing.co...php?f=4&t=17280



#54 datzenmike

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Posted 04 October 2017 - 04:01 PM

Sorry but buying and selling are for the classifieds...  http://community.rat...sort_order=desc  ... Start a for sale ad and include the price and yourrr rough location so shipping can be figured and a picture not the link. Mention if 29 spline (truck) or 23 spline (car, 510 wagon, Roadster, etc) and aluminum case. About 32 pounds.

 

 

ij86f25.jpg


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#55 distributorguy

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Posted 11 October 2017 - 10:54 AM

If I'm not mistaken that LSD will only go down to a 3.89 gear ratio before the ring won't fit.  Correct?



#56 G-Duax

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Posted 11 October 2017 - 12:42 PM

Mine had a 3.7 gear set on it when I bought it (out of Japan), but it is an iron carrier, 29 spline.


"All of a sudden it started making noise, then started losing power. I limped the car home and tried to get it up the driveway, the engine just died."

 

Why do people do this?

A $100 tow bill is never as much as the extra damage you cause by trying to "limp the car home".

 

Don't be that person !


#57 datzenmike

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Posted 11 October 2017 - 06:16 PM

If I'm not mistaken that LSD will only go down to a 3.89 gear ratio before the ring won't fit.  Correct?

 

I think all ring gears are 190mm. Only the number teeth and thickness would change.


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#58 thisismatt

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Posted 11 October 2017 - 06:33 PM

I think all ring gears are 190mm. Only the number teeth and thickness would change.

 

If they're anything like R180 ring gears, the ID changed and the bolt size changed as well.


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#59 datzenmike

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Posted 11 October 2017 - 06:59 PM

I was going to mention that. The H-223 changed the mounting bolt size around '94? Maybe H190 also. Inner Diameter?

 

Didn't Wayno swap lower gears onto an H-190 LSD?


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#60 wayno

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Posted 11 October 2017 - 07:24 PM

I was going to mention that. The H-223 changed the mounting bolt size around '94? Maybe H190 also. Inner Diameter?

 

Didn't Wayno swap lower gears onto an H-190 LSD?

 

Nope, wasn't me, not an LSD.

I did change out the bad carrier for a good one in a C200 which necessitated me moving the ring gear from one carrier to the other, but I didn't get rear cover sealed good and it ran out of fluid and wasted the pinion gear, it worked great till it ran out of fluid.