S15 complete rear end in S14 SR 5-speed - Need Shorter Final Gear? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

MrFairlady · 03-01-2012, 07:08 AM

I'm going to be putting my complete S15 rear Subframe with diff,axles & everything in my S14 soon.
a: Hopefully the ABS S14 Driveshaft Fits correctly....

Anyway,..Should I go ahead and change the Final Drive (to a 3.9 or 3.6) since Its going to be 6speed Rear end with 5 speed transmission?

may be eaiser to do, before I throw it all in is the reason I'm asking. Would rather not have Super Tall gears if thats what its going to do to my car.

Kingtal0n · 03-01-2012, 08:58 PM

I would run the S15 rear gear no matter what, even if you decided to use the five speed, if the car will be a daily driver, sometimes highway, with an OEM or similar clutch.

The Six speed transmission has a deeper first gear to allow the S15 rear gear to "make sense" but honestly, I have driven the five speed with the S15 rear gear and you can barely notice it is there, on the other hand, you DEFINITELY notice the highway cruise rpms are much more comfortable on a long drive.

if you decide you want a Five speed rear gear (3.9/4.1) And you want to sell the S15 rear, PM me I would like a shot at purchasing it first...

03-01-2012, 07:08 AM	#1
MrFairlady Nissanaholic! Join Date: Mar 2007 Location: Fascination Street,N.C Age: 45 Posts: 1,701 Trader Rating: (31) Rides Gallery: MrFairlady Feedback Score: 31 reviews	S15 complete rear end in S14 SR 5-speed - Need Shorter Final Gear? I'm going to be putting my complete S15 rear Subframe with diff,axles & everything in my S14 soon. a: Hopefully the ABS S14 Driveshaft Fits correctly.... Anyway,..Should I go ahead and change the Final Drive (to a 3.9 or 3.6) since Its going to be 6speed Rear end with 5 speed transmission? may be eaiser to do, before I throw it all in is the reason I'm asking. Would rather not have Super Tall gears if thats what its going to do to my car. __________________ z-tERty-2

03-01-2012, 08:58 PM	#2
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 41 Posts: 4,828 Trader Rating: (17) Feedback Score: 17 reviews	I would run the S15 rear gear no matter what, even if you decided to use the five speed, if the car will be a daily driver, sometimes highway, with an OEM or similar clutch. The Six speed transmission has a deeper first gear to allow the S15 rear gear to "make sense" but honestly, I have driven the five speed with the S15 rear gear and you can barely notice it is there, on the other hand, you DEFINITELY notice the highway cruise rpms are much more comfortable on a long drive. if you decide you want a Five speed rear gear (3.9/4.1) And you want to sell the S15 rear, PM me I would like a shot at purchasing it first...