tranny's SOHC vs DOHC - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TOMY · 06-24-2005, 09:36 AM

i hear that the major difference is that i need to use a sohc clutch and flywheel with a sohc tranny. Is this true? Are these not interchangeable? Also what would be the disadvantages of using the sohc tranny?

orion::S14 · 06-24-2005, 11:19 AM

You heard wrong...they are mechanically interchangebale.

Sensors/plugs are different, and the later year model trans have more sensors (and a different speed sensor)...but ANY S13/S14 KA24 trans works on ANY KA24 motor. Clutch and flywheel should match the motor.

- Brian

vinhisbored · 06-27-2005, 12:02 AM

I think the only reason why many don't use an SOHC tranny with a DOHC motor is because they don't 'think' they will work because of the motor difference. On the other hand, the DOHC tranny's do usually have less mileage (Relatively speaking).

SochBAT · 06-27-2005, 01:08 AM

SOHC = DOHC tranny. But everyone knows SOHC>DOHC enginewise. =D

chlatboy · 06-27-2005, 01:37 AM

Hahahaha. And yet everyone wants a DOHC engine to replace their SOHC.

DOHC OWNS!!!

sLip techniques · 06-27-2005, 09:43 AM

Quote:

Originally Posted by chlatboy

Hahahaha. And yet everyone wants a DOHC engine to replace their SOHC.

DOHC OWNS!!!

people do that!?!?!?OMG how could they!

i would think it shouldnt matter which transmission you use if your getting one for a replacement. Just find one with low miliage....or just rebuild.

SpeedMonkeyInc · 06-27-2005, 11:08 AM

I had an SOHC tranny in my S14 for about a year. There are a few minor differences mechanically. Mostly they are insignificant, however the DOHC trannys have "ribbing" or "webbing" cast into the casing to make the case stronger. Other than that it was already mentioned that a few of the sensors are different.

06-24-2005, 09:36 AM	#1
TOMY BANNED Join Date: Mar 2003 Location: Chicago Posts: 237 Trader Rating: (0) Feedback Score: 0 reviews	tranny's SOHC vs DOHC i hear that the major difference is that i need to use a sohc clutch and flywheel with a sohc tranny. Is this true? Are these not interchangeable? Also what would be the disadvantages of using the sohc tranny?

06-24-2005, 11:19 AM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,665 Trader Rating: (0) Feedback Score: 0 reviews	You heard wrong...they are mechanically interchangebale. Sensors/plugs are different, and the later year model trans have more sensors (and a different speed sensor)...but ANY S13/S14 KA24 trans works on ANY KA24 motor. Clutch and flywheel should match the motor. - Brian __________________ www.KA24DEvelopment.com

06-27-2005, 01:37 AM	#5
chlatboy Zilvia FREAK! Join Date: Aug 2004 Location: Somewhere Posts: 1,252 Trader Rating: (0) Feedback Score: 0 reviews	Hahahaha. And yet everyone wants a DOHC engine to replace their SOHC. DOHC OWNS!!! __________________ If you dont know SEARCH!!!

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06-27-2005, 12:02 AM	#3
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	I think the only reason why many don't use an SOHC tranny with a DOHC motor is because they don't 'think' they will work because of the motor difference. On the other hand, the DOHC tranny's do usually have less mileage (Relatively speaking).

06-27-2005, 01:08 AM	#4
SochBAT Post Whore! Join Date: Dec 2004 Location: Abilene, TX Age: 35 Posts: 6,428 Trader Rating: (9) Rides Gallery: SochBAT Feedback Score: 9 reviews	SOHC = DOHC tranny. But everyone knows SOHC>DOHC enginewise. =D

06-27-2005, 11:08 AM	#7
SpeedMonkeyInc Zilvia FREAK! Join Date: Apr 2003 Location: Oakland Age: 41 Posts: 1,271 Trader Rating: (0) Feedback Score: 0 reviews	I had an SOHC tranny in my S14 for about a year. There are a few minor differences mechanically. Mostly they are insignificant, however the DOHC trannys have "ribbing" or "webbing" cast into the casing to make the case stronger. Other than that it was already mentioned that a few of the sensors are different.