BABILLARACING

Hi guys, i been reading about this topic for about 6 hours and i been reading a lot of missinformation ( I gonna post what i found for sure so far,if i am wrong in something please let me know) . Reason i am doing this is cause i have a 1994 q45 (3.54) diff on my car and i am looking to change it to a shorter fd 3.69,3.91 or 4.08 (but i want to keep the stronger q45 output shafts). Anyway the easier route is get the 3.69 route ,but when i search around it looks like the 1997-2001 q45 3.69 use like j30 axles (please correct me if i am wrong) . First question if it is possible to pop out the output shaft of the newer q45 diff and change it to the older version ? . Also i was thinking in swaping the s14 4.08 pinion and ring onto the q45 diff and the bearings on the pinion are different sizes. Here is what i found so far

1994 q45 outer bearing
Pinion Bearing I.D. : 1.181"
Pinion Bearing O.D. : 2.835"
Pinion Bearing Width : 1.132"
NAPA part # BRG32306

q45 1994 inner bearing
Pinion Bearing I.D. : 1.327"
Pinion Bearing O.D. : 3.504"
Pinion Bearing Width : 1.534"
Napa part # BRG BR67

1996 s14 outer bearing
Pinion Bearing I.D. : 1.181"
Pinion Bearing O.D. : 2.835"
Pinion Bearing Width : 1.132"
NAPA part # BRG32306

1996 s14 inner bearing
Pinion Bearing I.D. : 1.378"
Pinion Bearing O.D. : 3.15"
Pinion Bearing Width : 1.289"
napa part # BRG BR32307

1996 infinity j30 outer bearing
I am guessing is the same size as the q45 and s14 but i dont have one to measure
if somebody have the size and part number lmk


1996 infinity j30 inner bearing
Pinion Bearing I.D. : 1.378"
Pinion Bearing O.D. : 3.15"
Pinion Bearing Width : 1.289"
napa part # BRG BR32307

tooth count
ring/pinion = final drive
46/13 = 3.54
48/13 = 3.69
47/12 = 3.91
49/12 = 4.08
37/9 = 4.11
48/11 =4.36


If anybody wants to share more info please post it up (but please make sure you are 100% sure is correct otherwise advice that you are not sure.Thanks in advance...Omar


4.900 - C23 Serena SR20DE 4WD Auto

4.636 - C23 Serena SR20DE 4WD Manual, C23 CD20T 4WD

4.375 - R32 RB20DET 4WD, A31 Cerfiro RB20DET 4WD

4.363 - R34 RB25DE 4WD, R34 RB25DE Manual, R34 RB20E, R33 RB25DE 4WD, R33 RB25DET Auto, R33 RB25DE, R32 RB20DET, R32 RB20E,
C35 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE 4WD Auto, C34 Laurel RB25DE Auto, C33 Laurel RB20DE Manual
A31 Cerfiro RB20DET, A31 Cerfiro RB20DE Manual, S13 CA18DET, S13 CA18DE, C23 Serena SR20DE 2WD, C23 Serena CD20T 2WD

4.111 - R34 RB25DET Auto, R33 RB25DET Manual, C35 Laurel RB25DET Auto, C35 Laurel RB20DE Auto, C34 Laurel RB25DET Auto, C34 Laurel RB20DE Auto,
S13 SR20DE (ABS),

4.083 - R34 RB25DE Auto, R33 RB20E, R32 RB20E (ABS), C33 Laurel RB20DE Auto, A31 Cerfiro RB20DE Auto,
S15 SR20DE, S14 SR20DET Manual, S14 SR20DE Manual, S13 SR20DET Manual, S13 SR20DE (ABS), S13 SR20DE,Z32 NA Auto or Manual

3.916 - S13 SR20DET Auto, S14 SR20DET Auto, S15 SR20DET Auto, A31 Cerfiro RB20E. 5 & 6 bolt

3.692 - S14 SR20DET ADM Manual, S15 SR20DET Manual. 5 & 6 bolt

3.583 - R33 RB25DE Auto, C33 Laurel RB20E Auto

gear ration speed calculator link
Gear Ratio Speed Calculator


another good link rebuild
Nissan 240sx S13 Rear Axles - R200 and R200V: overhaul, removal, installation and more - Garage411

ok this is what i figure with my set up . could be a little more or a little less . redline 7600 rpm tire diameter 26.1" and r154 tranny
3.54
1st 51mph
2nd 85
3rd 127
4th 166
5th 221

3.69
1st 49 mph
2nd 81
3rd 122
4th 160
5th 212

3.91
1st 46 mph
2nd 77
3rd 115
4th 150
5th 200

4.08

1st 44 mph
2nd 73
3rd 110
4th 145
5th 192

4.36

1st 42 mph
2nd 69
3rd 103
4th 135
5th 180

Z28ricer

Use the S14 case if its just the pinion bearings that are different sizes, looks like what you posted is that the carrier mount bearings are the same, use the S14 case, r&p and then your bearing problems are solved.

Epstein

MFer. I just posted a long explanation and the server choked.

Get the 97+ Q45 diff and see if the output shafts are 30-spline. Just because they have the "J30" bolt pattern for the axles (as you describe) doesn't mean anything. Late JDM S14 and S15 have 30-spline outputs and 3x2 flanges. If they do have a 30, pop your output shafts in. Done.

Or, get an R33 GT-R diff. Bushing mounted housing, 6x1 flanges, 4.11 gear, and clutch/mechanical center.

(by the way, 30-spline is the big spline that's on Q45 and Z32TT among others. Baby spline is 29-spline from the S13/S14/Z32 NA/100 others)

BABILLARACING

cool guys Thanks. i gonna be hitting the junk yard

BABILLARACING

This question comes up more often than the tire size question.

The axle code is located on the door jamb sticker on Nissans. If it's not there, there are visual ways of determining what you have. On some older trucks it's on a plate in the engine bay above the fender well on the passenger side.

HF35 - H190 axle found in weenie 2wd Hardbodies.
HF37 - H190 axle found in weenie 2wd Frontiers

CA41 - Found on 720's - This is a C200/R180 combo with 4.11 gearing. Some 720's have the smaller H190 rear end that's identified by not having a removable rear diff cover. R180 front ends in 720's are different than the Hardbody and Frontier versions, as the diff is nearly centered. 720's use unequal length halfshafts and are not interchangeable. All 1986.5+ halfshafts are interchangeable left to right.

CA43 - found on 720's and Hardbodies. C200 rear / R180 front, 4.375:1 gearing

CA46 - found on Hardbodies and 4 banger Frontiers - C200 rear / R180 front, 4.625:1 gears

CA45 - found in 2003+ Frontier 4x4's. This is a C200/R180 combination with a new gear ratio - 4.5something:1 The C200 was upgraded to 31 splines on this model from the previous 29 spline unit.

HG43 - Found on Pathfinders, V6 Hardbodies, and a few '99 Frontiers - H233B rear / R200 front, 4.375:1 gearing. On the 2000+ 33 spline axles, the HG43 has a 4.363 ratio, however this is not a common axle code on the later models.

HG46 - found on auto equipped pathfinders, 96-97 hardody 4 bangers, many Xterras and Frontiers. This one has some variation. Pre-2000 versions are the H233B axle with 4.625:1 gearing (31 spline axles). 2000+ is the H233B axle with 4.636:1 gearing (33 spline axles). Typically comes with an R200 front axle, with the exception being in the '96-97 Hardbody pickups - those had an H233B / R180 combination. Axle shafts in the H233B were 31 spline up to about 2000, where they switched to 33 spline shafts. All Xterras and R50 Pathfinders received the 33 spline axles. In Frontiers, it can be a crapshoot if you have a '99-'00 model, though it is believed that the switchover was at or near 2/00 production date.

HG49 - found in mid year 2001+ Frontiers and Xterras. H233B / R200 combo with 4.90:1 gears.

Locker Selection:

ARB lockers are available for the older 30 spline C200's and all H233b's. They're also avaialble for the R200 front, however no traction device is out there for the R180.

Calmini LSD's will work in an R200 front. (A Calmini LSD is a slightly modified '87-89 Turbo 300ZX LSD)

Lockrights will only work in the older 31 spline H233B.

Detroit used to make a locker for the older 31 spline H233B, but those are getting scarce.

Up to 4.875:1 gearing is available for C200's and R180's. Up to 5.143 gearing can be had for H233B's and R200's. AC and SLR are the two companies offering gears, or you may be able to get them through Nismo.

Let's say you don't have the doorjamb sticker.

H190 - small 3rd member type axle found in 2wd's only (excluding Desert Runners, Xterras, pathfinders)
C200 - removable rear diff cover, 8 bolts. Found in all Nissans (yes, even a few early 2wd Pathfinders)
H233B - large 3rd member type axle found in most V6 and a few 4 banger 4x4's, Desert Runners, and 2wd Pathy's and 2wd Xterra V6's.

Other notes:

The H233B 3rd member changed from 9 bolts to 11 studs to hold it to the housing beginning with the 1990 models. Somewhere along this time (maybe around 6/89, the bolts holding the ring gear to the carrier changed from 10mm to 12mm, making a difference in replacement gear sets.

What do the numbers mean?

The number in the axle model indicates the size of the ring gear in mm.

R180 - 180mm ring gear
H190 - 190mm ring gear
C200 / R200 - 200mm ring gear
H233B - 233mm ring gear (yes, that's about 9.25"!)

How do I figure out my gear ratio?

Put a jack under the diff and get both wheels under the ground. Draw a chalk line on the tires where they would contact the ground. Rotate BOTH tires by hand at the same speed one exact revolution while counting revolutions of he driveshaft. Just under 4 1/2 turns will indicate the 4.375:1 gears. Just a bit over 4 1/2 turns would indicate 4.625:1 or 4.636:1 gearing. If you have a late model, just a tick under 5 turns of the DS would indicate 4.90 gears.

LSD or open?

If you lost the sticker, get that jack back under the diff. Turn a wheel with the truck in neutral. If the other wheel spins in the opposite direction, you have an open diff. If it spins in the same direction, you likely have some sort of traction device - probably an LSD.

BABILLARACING

350z Differential and Axle Upgrade with OS Giken LSD - Stewart Leask

http://www.q45.org/bad/

170k240

i was gonna post stuart's build thread in here, you beat me to it.

btw, also keeping an eye out here. i've been trying to do some research lately about getting a longer final drive since the VQ trans + 4.083 final combo sucks.

BABILLARACING

i guess i gonna be doing the same thing , the only concern i have is that i read the 350vlsd got one ear and the open 350 have two .i don't have the money to buy a 1.5 lsd right now .i got to figure out something soon