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720 4x4 front diff R180?

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Is the front diff on Nissan 720 4x4 R180? This can be used on 510? And will 510 (68-73) stub axles bolt in?

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Yes, yes,... that I don't know. I assume the R-180 is wider than the stock R-160 so however an R-180 is installed the 720 R-180 should be the same.

 

'80-Sep '83 are 4.375.... Oct '83 and on are 4.11

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Yes, but at least on the later 720's the stub axles are clip-in, not bolt in like the 510, so you either need to modify your stub axles to accept the clip ring or swap the appropriate pieces into the new R180 to accept the bolts. Scroll down on this page and it's all detailed out with pictures:

 

http://www.diyautoftw.com/showthread.php?203-Differential-CV-LSD-HP-Torque-R160-R180-R200-R230-Diff-Mount-FAQ

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I could be mistaken but I believe the 720 r180s are snap in stub and the 510 is bolt in stub. You can convert by swapping the buttons from the stock r160. I guess you could leave it and let them float, some z guys do that but I never would. Again I could be wrong but I believe the tooth count is the same as well. Z guys call it a bolt in affair.

 

You can use a 4.11 from a 200sx too. I just installed one I got of ebay for 200 shipped. He had more if you want.

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Ya or like matt said you can mod the shafts for clip in. What Jon is talking about in the write up is what I was referring too, swapping the buttons. I just did it to the 200sx diff I installed. Not hard if you have the proper place and tools.

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I like the idea of the 720 R-180. For one thing just how far is a 4x4 driven in it's life time? Yeah not much so the wear on them is minimal.

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I like the idea of the 720 R-180. For one thing just how far is a 4x4 driven in it's life time? Yeah not much so the wear on them is minimal.

Exactly, and they get plenty of oil coatings from the leaky engine above them, so the cases aren't rusty at all :P

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True dat.

 

Fuckers to get out though. Took me 2 hrs on a truck laying on it's side with no intention of replacing it, just throw stuff out of the way..

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Thanks for the info guys, I had picked up R-180 from ratsun member a while back to put in my 510 this helps. I also found another one at local junk yard and the motor was out of 720 so this would be easy to get out

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Pretty sure the front axles are also no longer available from pretty much anywhere...might be worth grabbing to resell?

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Thats what I was thinking, I could easily get diff from Z from junk yard also and take pieces I need to convert into bolt in stub axles.

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It would have to be an early z. I think 260 on was snap in.

 

You can just buy snap in stubs from http://www.betamotorsports.com/ if you want.

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I like the Beta Motorsports stubs, but they are a little pricey for what im tying to do right now. If I get those stub axles I will be getting a WRX diff. So only early Z's have bolt in stub axles?

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Ya thats what I said actually lol. buying shafts will be for actual lsd. Yes I believe until 73

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Some of the early 720 - R180 front diffs did have bolt-in stub axles. I owned one with a big "K" on it.

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You sure it was stock? I never heard of a bolt in K series r180 before.

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From the best of my kowledge it was stock, but given the "K" R180 could be converted to use bolt in stub axles It may not have been.

 

I bought it from the local JY. They pulled it. The flanges for the truck half shafts were round with a bolt in the center. I never personally swapped the stub axles on it for use in a 510.

It could have been a warrantee or replacement part for a dealer repair that used a later “K” R180 in an earlier truck where the threaded spider gears inserts got installed to accept the bolt in axles. I have no the history other than that was how it came to me from the JY and I assumed it was OE.

 

I do not believe it was modified, but who knows. I just looked as if it was manufactured that way but without history it could well have been a replacement part.

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Pretty sure I've seen the bolt-in 6-bolt flanges before. I think it's just an early version of the K stamp R180.

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Interesting, another pro for a 710 4.11 over a 200sx

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You sure it was stock? I never heard of a bolt in K series r180 before.

 

Here's one of my 720 "K" series R180/4.11.....supposedly stronger than the non "K"?

The 510 R160 stubs bolt right in.......just have to swap the dust shields

 

P2120017_zps07ff88bd.jpg

 

P2120012_zps557f11a1.jpg

 

P2120013_zps687f2ddc.jpg

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Doug I think the Special Ks came out after '80 ish. Can't confirm they are stronger... probably.... and with better metallurgy.

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Correct......assuming 83+

Were the earlier R180s a 2 pinion...???....and the latter (K series) a 4 pinion?

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Well after checking some the 4 pinion R-180 was only on the Z24i so April '85 and up. All others were 2 pinions. Still not sure when the K came around. May be just the outer casting?

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P4080007_zpsaa5b039d.jpg

 

 

P4080006_zps3e85e7c5.jpg

 

K refers to a 4 pinion?

I have no Z24i trucks......I believe I have other 4.11s outside with no K stamped on them, which have the non bolt in stubs.

 

Maybe..... :D

 

My 510 has the R180/4.38s...bolt in stubs.

 

Hmmmmm...moar investigating is needed.

 

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I sold a K to one of the realm guys. Definitely a short 5 speed 4x4 and Z24 carb.

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