Question on s15 gear ratio - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Dirtcanhurt089 · 03-09-2017, 09:25 AM

I have an s15 spec s diff i am looking to buy and I can't find anything definitive on the gear ratio in it some people say yes it has the 3.69 same as the spec r but the car is a 5 speed not a 6 speed guess I'm looking to see if anyone else has any experience in what the ratio is , my car is setup with a z33 6 speed and I'm looking to use the diff for the speedo pickup and the gear ratio to not have 1-3 so short thanks guys

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jr_ss · 03-09-2017, 09:50 AM

Is there a picture of the ring gear? The ratio is stamped on it.

Dirtcanhurt089 · 03-09-2017, 09:52 AM

Don't have a pic of it it's still in his car he's swapping it with a q45 so I don't have it yet was just wondering if anyone knows if the spec s came with that ratio or not

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OddyseusDSM · 03-14-2017, 05:57 AM

Spec Should be 4.08 as it was not turbo. Automatic might be a little different. Also its not helical, or shouldn't be, vlsd if anything. Helicals came 3.69 (spec r) or 4.08 (autech, good luck finding that one)

Dirtcanhurt089 · 03-14-2017, 07:30 AM

I know it's not helical I'd assume vlsd, I already have a helical in my car right now I plan on swapping the ring gears on just trying to see if anyone knows car is not turbo so I'm not sure gonna see if he will open the diff and see if it is stamped

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LoSt180 · 03-17-2017, 12:35 PM

S15 sr20det MT - r200h 3.692
S15 sr20det AT - r200v 3.916
S15 sr20de MT - 4.083
S15 sr20de AT - 4.083

03-09-2017, 09:25 AM	#1
Dirtcanhurt089 Zilvia Member Join Date: Jun 2011 Location: plaistow nh Posts: 188 Trader Rating: (1) Feedback Score: 1 reviews	Question on s15 gear ratio I have an s15 spec s diff i am looking to buy and I can't find anything definitive on the gear ratio in it some people say yes it has the 3.69 same as the spec r but the car is a 5 speed not a 6 speed guess I'm looking to see if anyone else has any experience in what the ratio is , my car is setup with a z33 6 speed and I'm looking to use the diff for the speedo pickup and the gear ratio to not have 1-3 so short thanks guys Sent from my Pixel XL using Tapatalk

03-09-2017, 09:50 AM	#2
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,052 Trader Rating: (34) Feedback Score: 34 reviews	Is there a picture of the ring gear? The ratio is stamped on it. __________________ My SR20VET

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03-09-2017, 09:52 AM	#3
Dirtcanhurt089 Zilvia Member Join Date: Jun 2011 Location: plaistow nh Posts: 188 Trader Rating: (1) Feedback Score: 1 reviews	Don't have a pic of it it's still in his car he's swapping it with a q45 so I don't have it yet was just wondering if anyone knows if the spec s came with that ratio or not Sent from my Pixel XL using Tapatalk

03-14-2017, 05:57 AM	#4
OddyseusDSM Zilvia Junkie Join Date: Jan 2009 Location: NL, CT Posts: 373 Trader Rating: (4) Feedback Score: 4 reviews	Spec Should be 4.08 as it was not turbo. Automatic might be a little different. Also its not helical, or shouldn't be, vlsd if anything. Helicals came 3.69 (spec r) or 4.08 (autech, good luck finding that one)

03-14-2017, 07:30 AM	#5
Dirtcanhurt089 Zilvia Member Join Date: Jun 2011 Location: plaistow nh Posts: 188 Trader Rating: (1) Feedback Score: 1 reviews	I know it's not helical I'd assume vlsd, I already have a helical in my car right now I plan on swapping the ring gears on just trying to see if anyone knows car is not turbo so I'm not sure gonna see if he will open the diff and see if it is stamped Sent from my Pixel XL using Tapatalk

03-17-2017, 12:35 PM	#6
LoSt180 Zilvia Addict Join Date: May 2013 Location: MD Posts: 966 Trader Rating: (18) Feedback Score: 18 reviews	S15 sr20det MT - r200h 3.692 S15 sr20det AT - r200v 3.916 S15 sr20de MT - 4.083 S15 sr20de AT - 4.083