trsebert
11-13-2011, 05:45 PM
I would like some help identifying the diff i have depicted below. I have done a metric fuck ton of research. So far here are the stats of this diff:
I believe it is a 2way VLSD, of the R200 type (matched it to other pictures, and had the orange VLSD sticker on it)
Non ABS (absence of sensor, no output shaft rings)
5 bolt 'star' output flanges
Measurements of forward mounting bolt holes (6 inches apart), driveshaft flange and bolts (2.5 inches apart), and rear mounting bolts (x4) all match perfectly with the measurements taken from the stock 93 240 non LSD diff in the car.
Haven't been able to accurately measure the total length of the diff in comparison with the stock one in the car yet, although it appears close.
http://240atlanta.com/forums/attachment.php?attachmentid=26077&d=1321220628
http://240atlanta.com/forums/attachment.php?attachmentid=26083&d=1321220779
http://240atlanta.com/forums/attachment.php?attachmentid=26084&d=1321220785
http://240atlanta.com/forums/attachment.php?attachmentid=26085&d=1321220792
http://240atlanta.com/forums/attachment.php?attachmentid=26086&d=1321220800
http://240atlanta.com/forums/attachment.php?attachmentid=26087&d=1321220806
Gear ratio is 49/12 as seen on the ring gear, or 4.083 which is based on the below list from KA24Development.com which eliminates J30 and 180sx:
"Asad says: The ring gear actually has the ring and pinion tooth #'s stamped into it - For example:
49/12 = 4.083636 (stock ratio)
47/12 = 3.91666 (J30 ration)
48/11 ('JDM' 180SX diff, 4.36:1 ratio, 5-bolt output flanges) "
and it is not a 300zx NA diff:
"The '90-'96 300ZX N/A diff also fits but takes more work...
First thing: DO NOT get the twin turbo diff, as it uses an R230V which is physically too big to work, and it's got a much different gear ratio (3.6X:1). The non-turbo has the same ratio as the 240 (4.083:1). The biggest problem with the 300ZX diff is that the output flanges are different (but the same as the early J30 differentials). They look like a '5 star' flange where the 240sx uses 3 sets of 2 holes. The parts to convert a 300ZX diff to work in a 240SX can be had for around $200-300 new...
You have 2 options: Different output shafts, or different axles (i.e. early ['92-94] J30 axles)
You’ll need the output shafts from either the ABS equipped 240SX w/LSD, or the ones from a '95-96 J30 LSD (same part).
Or you can use the axles from the '92-94 J30 with the diff, as they have the same '5 star' bolt pattern but the correct length, splines count, and axle nut.
The 300ZX diff is the same size as your stock open diff b/c the Z uses 4-channel ABS, meaning the sensor is on the sides as opposed to the J30 with the sensor on the snout - so if you are really worried about the negligible extra length (see below), find the Z32 diff and convert it. "
and not a Q45 diff based on the pictures below:
http://240atlanta.com/forums/attachment.php?attachmentid=26075&d=1321220552
http://240atlanta.com/forums/attachment.php?attachmentid=26076&d=1321220553
As far as the R32 or R33 premises goes, it appears from research that some skyline diffs are of the R200 series casings; as far as the gear ratios, i have seen many say that the manual gts-t diff is a 4.1 ratio (which im thinking is a round up from 4.083???), and the rear cover of my diff ONLY matches the skyline gtst R200 diff
And from what I have read, the diff is a direct bolt up, with the obvious exception that i will have to remove the output shafts with ones that mate to the 6 bolt 240 axles, or i suppose get skyline axles. I would rather do the latter, depending on how easy it is to find output shaft, and whether the 240 R200 output shafts will work.
Also i have seen a few wishy-washy posts on random forums by people that say the above might work, but they go further to discredit themselves by citing false details related to the subject. I'm looking for someone that knows this will work or that has legitimate contributions to this topic.
Just in case those pictures don't work, here is a link to the same post on 240atlanta.com:
Possible R32 or R33 diff? (http://240atlanta.com/forums/showthread.php?71498-Possible-R32-or-R33-diff)
I believe it is a 2way VLSD, of the R200 type (matched it to other pictures, and had the orange VLSD sticker on it)
Non ABS (absence of sensor, no output shaft rings)
5 bolt 'star' output flanges
Measurements of forward mounting bolt holes (6 inches apart), driveshaft flange and bolts (2.5 inches apart), and rear mounting bolts (x4) all match perfectly with the measurements taken from the stock 93 240 non LSD diff in the car.
Haven't been able to accurately measure the total length of the diff in comparison with the stock one in the car yet, although it appears close.
http://240atlanta.com/forums/attachment.php?attachmentid=26077&d=1321220628
http://240atlanta.com/forums/attachment.php?attachmentid=26083&d=1321220779
http://240atlanta.com/forums/attachment.php?attachmentid=26084&d=1321220785
http://240atlanta.com/forums/attachment.php?attachmentid=26085&d=1321220792
http://240atlanta.com/forums/attachment.php?attachmentid=26086&d=1321220800
http://240atlanta.com/forums/attachment.php?attachmentid=26087&d=1321220806
Gear ratio is 49/12 as seen on the ring gear, or 4.083 which is based on the below list from KA24Development.com which eliminates J30 and 180sx:
"Asad says: The ring gear actually has the ring and pinion tooth #'s stamped into it - For example:
49/12 = 4.083636 (stock ratio)
47/12 = 3.91666 (J30 ration)
48/11 ('JDM' 180SX diff, 4.36:1 ratio, 5-bolt output flanges) "
and it is not a 300zx NA diff:
"The '90-'96 300ZX N/A diff also fits but takes more work...
First thing: DO NOT get the twin turbo diff, as it uses an R230V which is physically too big to work, and it's got a much different gear ratio (3.6X:1). The non-turbo has the same ratio as the 240 (4.083:1). The biggest problem with the 300ZX diff is that the output flanges are different (but the same as the early J30 differentials). They look like a '5 star' flange where the 240sx uses 3 sets of 2 holes. The parts to convert a 300ZX diff to work in a 240SX can be had for around $200-300 new...
You have 2 options: Different output shafts, or different axles (i.e. early ['92-94] J30 axles)
You’ll need the output shafts from either the ABS equipped 240SX w/LSD, or the ones from a '95-96 J30 LSD (same part).
Or you can use the axles from the '92-94 J30 with the diff, as they have the same '5 star' bolt pattern but the correct length, splines count, and axle nut.
The 300ZX diff is the same size as your stock open diff b/c the Z uses 4-channel ABS, meaning the sensor is on the sides as opposed to the J30 with the sensor on the snout - so if you are really worried about the negligible extra length (see below), find the Z32 diff and convert it. "
and not a Q45 diff based on the pictures below:
http://240atlanta.com/forums/attachment.php?attachmentid=26075&d=1321220552
http://240atlanta.com/forums/attachment.php?attachmentid=26076&d=1321220553
As far as the R32 or R33 premises goes, it appears from research that some skyline diffs are of the R200 series casings; as far as the gear ratios, i have seen many say that the manual gts-t diff is a 4.1 ratio (which im thinking is a round up from 4.083???), and the rear cover of my diff ONLY matches the skyline gtst R200 diff
And from what I have read, the diff is a direct bolt up, with the obvious exception that i will have to remove the output shafts with ones that mate to the 6 bolt 240 axles, or i suppose get skyline axles. I would rather do the latter, depending on how easy it is to find output shaft, and whether the 240 R200 output shafts will work.
Also i have seen a few wishy-washy posts on random forums by people that say the above might work, but they go further to discredit themselves by citing false details related to the subject. I'm looking for someone that knows this will work or that has legitimate contributions to this topic.
Just in case those pictures don't work, here is a link to the same post on 240atlanta.com:
Possible R32 or R33 diff? (http://240atlanta.com/forums/showthread.php?71498-Possible-R32-or-R33-diff)