vsld s13 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

philipwight · 09-03-2002, 10:38 PM

I bought a vlsd from jspec.com and was wondering how i can find out what the gear ratio is,  i dont want to try and count the teeth.  Some of the numbers on the differential are

A5-9500330b and right under that is 19768. Its looks as though those were printed on there some how.

these are casted into the housing:
68311
40F00

This looks as if it was stamped on there:
331B
A5

any help would be much appreciated.

philip

guidot · 09-03-2002, 11:23 PM

Is it an aftermarket vlsd or is it a OEM part?  The OEM part is ~4.09 ratio.  Fairly high if you analyze it.  If its aftermarket I would try to contact the company about it.

philipwight · 09-03-2002, 11:28 PM

I belive it is an oem part, but it is from japan so i think it may have come off of a turbo s13, which i belive have lower gear ratios.

guidot · 09-03-2002, 11:34 PM

Well I really cant answer your question properly if you already know it.  I know the transmission gear ratios didn't change, so why would they change the rear end ratios, I don't know.

AKADriver · 09-04-2002, 10:04 AM

It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely.  There's a smaller chance it's a 4.363:1 unit from a CA18DET.

If you don't mind opening up the diff, you don't have to count the teeth...  IIRC there should be a set of numbers stamped on the ring gear itself.

49/12 = 4.083:1
47/12 = 3.916:1
48/11 = 4.363:1

philipwight · 09-04-2002, 11:50 AM

thank you for the information, that was exactly what i was looking for, it is 4.083 gear ratio.

exitsanity · 09-18-2002, 04:50 PM

so the higher gear ratio is the more desireable one?

***PHLIP*** · 10-02-2002, 09:29 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (exitsanity @ Sep. 18 2002,5:50)</td></tr><tr><td id="QUOTE">so the higher gear ratio is the more desireable one?</td></tr></table><span id='postcolor'>
The higher the number, the shorter the gear, the sooner you will have to shift... I know someone with the 4.36 and he has virtually NO use for 1st gear before he redlines and has to shift. This being said, you will get worse gas mileage the shorter that gear is.

*Jeff240sx* · 10-02-2002, 10:03 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (guidot @ Sep. 04 2002,02:34)</td></tr><tr><td id="QUOTE">Well I really cant answer your question properly if you already know it. *I know the transmission gear ratios didn't change, so why would they change the rear end ratios, I don't know.</td></tr></table><span id='postcolor'>
Guidot,
SR20DET motors in Japan will have a lower final drive ratio, as was explained in the 2 posts above mine, because you can stay in that gear longer.
Normally, that's not good, but when you are boosting, you would like to stay in the spool-up area for as long as humanly possible.  That's why.  Same with 300zx NA vs. TT.  The NA has our gear ratio, while the TT has 3.8something.
-Jeff

*drift freaq* · 10-02-2002, 11:38 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely. *There's a smaller chance it's a 4.363:1 unit from a CA18DET.
If you don't mind opening up the diff, you don't have to count the teeth... *IIRC there should be a set of numbers stamped on the ring gear itself.
49/12 = 4.083:1
47/12 = 3.916:1
48/11 = 4.363:1
</td></tr></table><span id='postcolor'>

ok this correct to a point.
The SR powered Turbo cars i.e. S14 and S15 came with 3.70:1 gears . I also am pretty sure it was the same with the S13 SR20DET cars . The 300zx TT  also came with 3.70:1 gears .
as far as the CA18det ratio's are concerned you are correct

*Grant* · 10-02-2002, 01:46 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (drift freaq @ Oct. 02 2002,10:38)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely. *There's a smaller chance it's a 4.363:1 unit from a CA18DET.
If you don't mind opening up the diff, you don't have to count the teeth... *IIRC there should be a set of numbers stamped on the ring gear itself.
49/12 = 4.083:1
47/12 = 3.916:1
48/11 = 4.363:1
</td></tr></table><span id='postcolor'>

ok this correct to a point.
The SR powered Turbo cars i.e. S14 and S15 came with 3.70:1 gears . I also am pretty sure it was the same with the S13 SR20DET cars . The 300zx TT *also came with 3.70:1 gears .
as far as the CA18det ratio's are concerned you are correct</td></tr></table><span id='postcolor'>
according to Sam from jspec.com the s14 silvia LSD differential  had the 3.92:1 gear ratio. He indicated to something on the casing of the diff itself referring to that.

sayuki · 10-02-2002, 01:52 PM

hmm - would this also explain why I can't put her into 1st gear unless I am going so slow I'm practically stopped?

*drift freaq* · 10-02-2002, 10:47 PM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">according to Sam from jspec.com the s14 silvia LSD differential *had the 3.92:1 gear ratio. He indicated to something on the casing of the diff itself referring to that.
</td></tr></table><span id='postcolor'>
well it may have come in some of the cars but the info I had came straight from a ziliva member who lives in UK because I wanted to know and asked and he answered right out of his FSM.

09-03-2002, 10:38 PM	#1
philipwight Leaky Injector Join Date: Sep 2002 Posts: 60 Trader Rating: (0)	I bought a vlsd from jspec.com and was wondering how i can find out what the gear ratio is,  i dont want to try and count the teeth.  Some of the numbers on the differential are A5-9500330b and right under that is 19768. Its looks as though those were printed on there some how. these are casted into the housing: 68311 40F00 This looks as if it was stamped on there: 331B A5 any help would be much appreciated. philip __________________ 1993 Nissan 240sx -KAAZ 2-way -crystal clear H4 upgraded lights -sportline springs-tokico blue struts -(1)JL audio 12w3 in bandpass box-Rockford 500x-Infinity 4x6 -clarion Rdx765Dz head unit

09-03-2002, 11:23 PM	#2
guidot Zilvia Junkie Join Date: Feb 2002 Location: Cape Cod, MA Age: 30 Posts: 443 Trader Rating: (0)	Is it an aftermarket vlsd or is it a OEM part?  The OEM part is ~4.09 ratio.  Fairly high if you analyze it.  If its aftermarket I would try to contact the company about it. __________________ -Jeff T. 96 240SX 240SXONE http://www.240sxone.com

09-03-2002, 11:28 PM	#3
philipwight Leaky Injector Join Date: Sep 2002 Posts: 60 Trader Rating: (0)	I belive it is an oem part, but it is from japan so i think it may have come off of a turbo s13, which i belive have lower gear ratios. __________________ 1993 Nissan 240sx -KAAZ 2-way -crystal clear H4 upgraded lights -sportline springs-tokico blue struts -(1)JL audio 12w3 in bandpass box-Rockford 500x-Infinity 4x6 -clarion Rdx765Dz head unit

09-03-2002, 11:34 PM	#4
guidot Zilvia Junkie Join Date: Feb 2002 Location: Cape Cod, MA Age: 30 Posts: 443 Trader Rating: (0)	Well I really cant answer your question properly if you already know it.  I know the transmission gear ratios didn't change, so why would they change the rear end ratios, I don't know. __________________ -Jeff T. 96 240SX 240SXONE http://www.240sxone.com

09-04-2002, 10:04 AM	#5
AKADriver Post Whore! Join Date: May 2002 Location: McLean, VA Age: 28 Posts: 3,098 Trader Rating: (0)	It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely.  There's a smaller chance it's a 4.363:1 unit from a CA18DET. If you don't mind opening up the diff, you don't have to count the teeth...  IIRC there should be a set of numbers stamped on the ring gear itself. 49/12 = 4.083:1 47/12 = 3.916:1 48/11 = 4.363:1 __________________ 2000 Miata When changing your brake fluid, remember to dispose of any excess fluid properly. It might be inconvenient, but there's no excuse for not drinking it all.

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09-04-2002, 11:50 AM	#6
philipwight Leaky Injector Join Date: Sep 2002 Posts: 60 Trader Rating: (0)	thank you for the information, that was exactly what i was looking for, it is 4.083 gear ratio. __________________ 1993 Nissan 240sx -KAAZ 2-way -crystal clear H4 upgraded lights -sportline springs-tokico blue struts -(1)JL audio 12w3 in bandpass box-Rockford 500x-Infinity 4x6 -clarion Rdx765Dz head unit

09-18-2002, 04:50 PM	#7
exitsanity Join Date: Aug 2002 Location: San Diego Posts: 43 Trader Rating: (0)	so the higher gear ratio is the more desireable one? __________________ '01 Nissan Sentra SE (sr20de) for sale '91 Nissan 240sx fastback (ka24de) being built .my website.

10-02-2002, 10:03 AM	#9
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 27 Posts: 5,849 Trader Rating: (0) Rides Gallery: Jeff240sx	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (guidot @ Sep. 04 2002,02:34)</td></tr><tr><td id="QUOTE">Well I really cant answer your question properly if you already know it. *I know the transmission gear ratios didn't change, so why would they change the rear end ratios, I don't know.</td></tr></table><span id='postcolor'> Guidot, SR20DET motors in Japan will have a lower final drive ratio, as was explained in the 2 posts above mine, because you can stay in that gear longer. Normally, that's not good, but when you are boosting, you would like to stay in the spool-up area for as long as humanly possible.  That's why.  Same with 300zx NA vs. TT.  The NA has our gear ratio, while the TT has 3.8something. -Jeff __________________ Whatup?

10-02-2002, 11:38 AM	#10
drift freaq Hey, that's my Passport, Aya ! Join Date: Nov 2001 Location: Hollywoooood! Posts: 12,963 Trader Rating: (80) Rides Gallery: drift freaq	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely. There's a smaller chance it's a 4.363:1 unit from a CA18DET. If you don't mind opening up the diff, you don't have to count the teeth... IIRC there should be a set of numbers stamped on the ring gear itself. 49/12 = 4.083:1 47/12 = 3.916:1 48/11 = 4.363:1 </td></tr></table><span id='postcolor'> ok this correct to a point. The SR powered Turbo cars i.e. S14 and S15 came with 3.70:1 gears . I also am pretty sure it was the same with the S13 SR20DET cars . The 300zx TT  also came with 3.70:1 gears . as far as the CA18det ratio's are concerned you are correct __________________ 1991 Azzurro California Metallic S13.5 VQ35HR project in the works! 1993.5 INFINITI G20 86k Current Daily(Gas Saver) FS:http://zilvia.net/f/sale-items/27547...ne-mounts.html

10-02-2002, 01:46 PM	#11
Grant Premium Member Join Date: Jun 2001 Location: 聖地牙哥 Posts: 2,643 Trader Rating: (0) Rides Gallery: Grant	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (drift freaq @ Oct. 02 2002,10:38)</td></tr><tr><td id="QUOTE"></span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">It's either 4.083:1 (KA24DE, SR20DE, SR20DET manual) or 3.916:1 (SR20DET automatic), most likely. There's a smaller chance it's a 4.363:1 unit from a CA18DET. If you don't mind opening up the diff, you don't have to count the teeth... IIRC there should be a set of numbers stamped on the ring gear itself. 49/12 = 4.083:1 47/12 = 3.916:1 48/11 = 4.363:1 </td></tr></table><span id='postcolor'> ok this correct to a point. The SR powered Turbo cars i.e. S14 and S15 came with 3.70:1 gears . I also am pretty sure it was the same with the S13 SR20DET cars . The 300zx TT *also came with 3.70:1 gears . as far as the CA18det ratio's are concerned you are correct</td></tr></table><span id='postcolor'> according to Sam from jspec.com the s14 silvia LSD differential  had the 3.92:1 gear ratio. He indicated to something on the casing of the diff itself referring to that.

10-02-2002, 01:52 PM	#12
sayuki Leaky Injector Join Date: Sep 2002 Location: San Francisco Posts: 80 Trader Rating: (0)	hmm - would this also explain why I can't put her into 1st gear unless I am going so slow I'm practically stopped?

10-02-2002, 10:47 PM	#13
drift freaq Hey, that's my Passport, Aya ! Join Date: Nov 2001 Location: Hollywoooood! Posts: 12,963 Trader Rating: (80) Rides Gallery: drift freaq	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote </td></tr><tr><td id="QUOTE">according to Sam from jspec.com the s14 silvia LSD differential *had the 3.92:1 gear ratio. He indicated to something on the casing of the diff itself referring to that. </td></tr></table><span id='postcolor'> well it may have come in some of the cars but the info I had came straight from a ziliva member who lives in UK because I wanted to know and asked and he answered right out of his FSM. __________________ 1991 Azzurro California Metallic S13.5 VQ35HR project in the works! 1993.5 INFINITI G20 86k Current Daily(Gas Saver) FS:http://zilvia.net/f/sale-items/27547...ne-mounts.html

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