And since this has to do with AWD stuff...is your wagon AWD or 4WD? In other words can you drive it safely on pavement?? Reason I ask is i've been thinking about converting my puslar to awd...but was under the impression that all USDM trannies are 4wd and won't differentiate between front and rear. But I'm going to use a CA20 so its different application. The only 4wd tranny for CA20 is stanza wagon (which i have) but it doesnt' differentiate between front and back. Anyone have an idea how to cure that if I used a 4wd tranny?
I'm a little scetchy on what differentiates 4WD or AWD. The 4WD B12's were made three years, '87, '88, and '89. The '87 and '88's were E16i powered and had a button in the shifter to engage and disengage the 4WD. You do not want to drive these in 4WD in the dry. The car will bind up in the turns.
However, in '89 Nissan added the GA16i engine and did away with the 4WD button and made the car full time 4WD. Nissan did this by engaging the transfer case in 4WD all the time, doing away with the electric servo motor that previously actuated the transfer case mode, and added a viscous coupling to the rear of the transfer case [in front of the rear driveshaft]. This is exactly what the WRX has. This allows the car to turn easily, even in 4WD. I'm not aware that the M10 4WD Stanza Wagons had that. You would definately need a viscous coupling in between the transfer case and the rear driveshaft to drive it on the street. I hope this answers your questions.
I'm a little scetchy on what differentiates 4WD or AWD. The 4WD B12's were made three years, '87, '88, and '89. The '87 and '88's were E16i powered and had a button in the shifter to engage and disengage the 4WD. You do not want to drive these in 4WD in the dry. The car will bind up in the turns.
However, in '89 Nissan added the GA16i engine and did away with the 4WD button and made the car full time 4WD. Nissan did this by engaging the transfer case in 4WD all the time, doing away with the electric servo motor that previously actuated the transfer case mode, and added a viscous coupling to the rear of the transfer case [in front of the rear driveshaft]. This is exactly what the WRX has. This allows the car to turn easily, even in 4WD. I'm not aware that the M10 4WD Stanza Wagons had that. You would definately need a viscous coupling in between the transfer case and the rear driveshaft to drive it on the street. I hope this answers your questions.
so...if i can somehow get that viscous coupling to work on the M10 drivetrain then I'd be set? is that possible? and i've started another thread about this so post it there cause its easier to keep all the info in one thread. And yeah, m10 didn't have that, i've driven a few times in 4wd during dry for fun...makes it launch really fast cause it wont spin at all, but scarey when turning.
__________________ Student at UTI Avondale 2nd place SkillsUSA/VICA WA State Automotive Maintenence '04 had an 87 pulsar...still planning CA20DET
1970 Chevy BelAir 350V8 300hp...soon to get M21
hey blown...what transmission do you have? According to the book sentra only had the 31A...but by parts numbers the AWD would have to have the 50A
__________________ Student at UTI Avondale 2nd place SkillsUSA/VICA WA State Automotive Maintenence '04 had an 87 pulsar...still planning CA20DET
1970 Chevy BelAir 350V8 300hp...soon to get M21
The book is right. I have the RS5F31A transaxle. They had a special case 31A for the 4WD cars.
thats funky. The transfer case is the same case thats used on the stanza wagon, just different internals. Thanks for the info and help.
__________________ Student at UTI Avondale 2nd place SkillsUSA/VICA WA State Automotive Maintenence '04 had an 87 pulsar...still planning CA20DET
1970 Chevy BelAir 350V8 300hp...soon to get M21
Great news for the two or three of us who want to put a Subaru diff in the rear of our 4WD Sentras. I was replacing the rear wheel bearings on a '99 Impreza 2.5 RS today. I'm looking at the rear diff and notice that unlike the axles of the old Subarus that are retained externally with a roll pin, the '99 2.5 RS axles snap right in, just like the original 4WD B12's do. Evidently, Subaru changed their rear axle design in the late nineties. This means that all of the disassembly, custom machining of the spider gears, and reassembly of my late '80's Subaru LSD R160 diff to fit my stock 4WD B12 rear axles won't be necessary if you get the '99 2.5 Diff. I checked the axle retention method and it's a match, splines and all! However, that's not the end of the story. I do not know if the '99 Subie diff is a 3.70 or not. And also, this particular '99 2.5 RS diff is NOT an LSD. But perhaps it was an option on the 2.5 RS's and maybe the WRX's also have the R160 rear diff. It would be worth looking into.
The Subie's do come with LSD's but a lot are viscous and thus have a special double slined CV on one side. This would mean having to use the Subie CV's or one of them at least. Maybe the Subie inner CV will fit a B12 shaft? You never know, maybe? I have some Subie VLSD shafts in my shed I can photograph if you like so you can see what I mean.
The Subie's do come with LSD's but a lot are viscous and thus have a special double slined CV on one side. This would mean having to use the Subie CV's or one of them at least. Maybe the Subie inner CV will fit a B12 shaft? You never know, maybe? I have some Subie VLSD shafts in my shed I can photograph if you like so you can see what I mean.
-Eddie-
That would be excellent Eddie. I'd love to see what that looks like. I did not know the Subaru diffs with Viscous LSD used a double splined CV on one side. Do you know what year Subaru started using VLSD diffs? As you know, the late '80's Subaru LSD diff that I modified to fit my B12 is not a VLSD, but a regular clutch type diff. I'll go and check around on the NASIOC forums to learn a bit more.
That would be excellent Eddie. I'd love to see what that looks like. I did not know the Subaru diffs with Viscous LSD used a double splined CV on one side. Do you know what year Subaru started using VLSD diffs? As you know, the late '80's Subaru LSD diff that I modified to fit my B12 is not a VLSD, but a regular clutch type diff. I'll go and check around on the NASIOC forums to learn a bit more.
Here you go The double splined CV is on the RH driveshaft. This came from a '98 model if I remember rightly. I spend a lot of money buying the diff and shafts in '99 for my 510 only to find i couldn't use it I don't know when they started using VLSD's but I was told by an Impreza enthusiast thay they no longer fit them an new cars have either plate LSD's or Torsen diffs.
If this all fits you are a god! I would think that there is something aftermarket out there that may work in the stock diff, like a phantom grip or something so that we can convert the non lsd diff into an lsd one very easily. THen we can get away with the nissan axles and what not. THis is really cool guys.
Brent
__________________
1991 B13 SE-R
Hyperco Gen 2 on AGX
ACT clutch/es mount inserts
B&M short shifter
AD22VF upgrade w/stainless lines
to bad its to much trouble to do AWD pulsar...but now i'm curious about building a CA20DET AWD sentra wagon or stanza wagon. With LSD rear end that would be awesome. But I've always wondered, what happens when you have the rear end LSD but the front isnt? And are the subie and nissan shafts the same diameter also? someone should try fitting the nissan shaft into the subie shaft. Also remember that the subie rear end might not have the same dimensions so whatever shafts you use might not still match to the wheel correctly. But it the shaft is to long you could find a very good driveshaft man and have it shortened to correct length, might be expensive but worth it.
__________________ Student at UTI Avondale 2nd place SkillsUSA/VICA WA State Automotive Maintenence '04 had an 87 pulsar...still planning CA20DET
1970 Chevy BelAir 350V8 300hp...soon to get M21
If this all fits you are a god! I would think that there is something aftermarket out there that may work in the stock diff, like a phantom grip or something so that we can convert the non lsd diff into an lsd one very easily. THen we can get away with the nissan axles and what not. THis is really cool guys.
Here you go The double splined CV is on the RH driveshaft. This came from a '98 model if I remember rightly. I spend a lot of money buying the diff and shafts in '99 for my 510 only to find i couldn't use it I don't know when they started using VLSD's but I was told by an Impreza enthusiast thay they no longer fit them an new cars have either plate LSD's or Torsen diffs.
Thank you very much for posting the picture Eddie. Yes, now it is very clear that the VLSD diff probably would not be worth considering for this swap. I still have to get on the Subie web sites and find out what the new WRX's are using for a rear diff. I know they have a rear LSD, but for all I know, they might be using an R180 with all that turbo power.
I found the diff you need for your 510 Eddie. Shipping costs to the UK would be high though. This is the exact type I modified the spider gears on, and used in my 4WD B12. http://cgi.ebay.com/ebaymotors/ws/eB...MEWA%3AIT&rd=1
But I've always wondered, what happens when you have the rear end LSD but the front isnt?
I wondered that too, before I swapped mine in. The answer is: It works great! That's not too surprising as that's what all of the standard 227 hp WRX's have from the factory.
Quote:
Originally Posted by Gsolo
And are the subie and nissan shafts the same diameter also? someone should try fitting the nissan shaft into the subie shaft.
Yes, they are both the same diameter and use the same spline. I'm talking about the late '80's subie diffs when I say this. They include the Loyales, XT's, GL's, and maybe even a Justy.
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The 4WD B12's were made three years, '87, '88, and '89. The '87 and '88's were E16i powered and had a button in the shifter to engage and disengage the 4WD. You do not want to drive these in 4WD in the dry. The car will bind up in the turns.
The double splined CV is on the RH driveshaft. This came from a '98 model if I remember rightly. I spend a lot of money buying the diff and shafts in '99 for my 510 only to find i couldn't use it
I don't know when they started using VLSD's but I was told by an Impreza enthusiast thay they no longer fit them an new cars have either plate LSD's or Torsen diffs. 
to bad its to much trouble to do AWD pulsar...but now i'm curious about building a CA20DET AWD sentra wagon or stanza wagon. With LSD rear end that would be awesome. But I've always wondered, what happens when you have the rear end LSD but the front isnt? And are the subie and nissan shafts the same diameter also? someone should try fitting the nissan shaft into the subie shaft. Also remember that the subie rear end might not have the same dimensions so whatever shafts you use might not still match to the wheel correctly. But it the shaft is to long you could find a very good driveshaft man and have it shortened to correct length, might be expensive but worth it.
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