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Dime Dave

H190 Differentials (w/Pictures)

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521 and early 620 were H-190-AL...... A was for Aluminum I believe (also used in the Roadster and 510 Goon)

 

620s were just H-190 (steel carriers from here on)

 

720s were H-190-ML and A ... I'm asking on another forum.

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I am planning on swapping third members

there was(IS) a LSD third member at the swapmeet over the weekend, slightly used @ $700.

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Thank you for the heads up on the LSD. I already have the 1980 3.889.

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That's a fair deal for an LSD with only slight wear.

makes me wish i had sold the new LSD R160 diff i had (installed now :) ) and bought an LSD R180...

 

 

:mellow:

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I'm looking at a Pick n Pull 1980 510 with an H190 diff for my 1959 truck. Any difference in the alloy or stell H190 carriers?

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Aluminum H-190-AL carriers were used in the 521 and early 620, (to Sept '73 I think) 510 wagons and the earlier Roadsters. Everything since was steel I think.

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There were different splines used so what does this LCD fit exactly? The goon and Roadster? the 521/620/720? It mayfit the H-190 but which one?

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There were different splines used so what does this LCD fit exactly? The goon and Roadster? the 521/620/720? It mayfit the H-190 but which one?

 

From a phone call i had with him a while ago, i think he told me it would fit the h190 form the 320 with a 3.9 ratio( i have no idea if this is correct)

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From a phone call i had with him a while ago, i think he told me it would fit the h190 form the 320 with a 3.9 ratio( i have no idea if this is correct)

 

Then it would have a 13 tooth side gear. Roadster, 510 goons and Maxima goons have 23 tooth splines, 520/521/620/720 are 29 tooth spline.

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I'm looking at a Pick n Pull 1980 510 with an H190 diff for my 1959 truck

1980 Datsun 510 has an H165 diff

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1980 Datsun 510 has an H165 diff

 

Saw that, and assumed he was replacing everything with the narrow 510 one. H-190 is overkill on such a small tuck.

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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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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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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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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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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.

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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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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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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.

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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://datsunminitruckin.com/h190-for-my-freeway-blaster-620_topic2939.html

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