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

Crab Spirits · 03-26-2003, 03:52 PM

Probly a noob question, but I've seen a lot of conflicting info on this.

Is there a USDM counterpart for the S13 Silvia 5-spd trans? Will a 240sx unit work? What are the differences?

The Mole · 03-26-2003, 04:02 PM

i believe you have to swap the bell housings from what ive been told

-chris

p.s. possibly a noob answer too lol

Crab Spirits · 03-26-2003, 04:10 PM

I have heard that too, but is a 240 trans the same trans? Will it turn a silvia driveshaft?

RedSuns · 03-26-2003, 04:43 PM

the KA and SR tranny are two peice trannys......once you have swapped the bell housing they will match up directly....both the S13/S14 SR tranny will work with the KA(USDM 240SX) driveshaft.....but the S15 tranny requires the front driveshaft from a S15....the S15 has different splines that the S13/S14 SR

SimpleS14 · 03-26-2003, 05:37 PM

So you can use a KA tranny with a S13/14 SR?

Dousan_PG · 03-26-2003, 05:56 PM

Quote:

Originally posted by GT specR
So you can use a KA tranny with a S13/14 SR?

Yes.

Dark · 03-26-2003, 06:01 PM

Is the JDM SR tranny better than the USDM cause I'm not happy with mine or are they exactly the same

RedSuns · 03-26-2003, 06:14 PM

the internal gearing of the SR is different that the gearing of the KA......i will post te differences once i find them

Jim96SC2 · 03-26-2003, 07:16 PM

I believe that the silvia tranny has double synchomesh also.

Dark · 03-26-2003, 09:35 PM

Ok if it does have double synchromesh does that mean that shifting will be much smoother everytime my gear grinds I remeber my freinds VR4 ahhh that was a sweet tranny

DuffMan · 03-27-2003, 03:14 AM

No the gear ratios are the same. CA18 has different gear ratios though.

Kind of weird actually, the USDM 240sx had silvia/180sx gear ratios before the silvia/180sx got them.

Steeles · 03-27-2003, 07:11 AM

Quote:

Originally posted by DuffMan
No the gear ratios are the same. CA18 has different gear ratios though.

Kind of weird actually, the USDM 240sx had silvia/180sx gear ratios before the silvia/180sx got them.

ratios are the same EXCEPT 5th gear (uiuc will correct me cuz he's a nerd like that) but the KA is like .752 and the SR is like .856

different front bellhousings as said before but both work quite well

N1ceDrgn · 03-27-2003, 09:24 AM

The transmission core's or gear sets are the same. Now whether or not the transmission housings, when you start to swap them in and out will match up I can't say. With mine I had to keep the entire housing to get things to work. Otherwise I'd have to make some changes to my driveshaft. But there are differences in the gears. Both SR and CA from what I have learned are different from the KA transmissions. The differences come into play in the top end or final gears. After changing out my CA transmission core, I haven't been too happy with the KA gear set I am using. I am in the process of acuiring the CA gears and bearings I need to rebuild my original gear set. Back to the subject though, the main differences are in the final gears. As far as mounting, changing out the bell housings should work.

Crab Spirits · 03-27-2003, 05:15 PM

See what Imean by conflicting info?

the head · 04-01-2003, 09:44 PM

if you swap the bellhousings it will fit
IIRC the first three gears on SR trans have double synchros
i am not aware of any other i don't know gear ratios so i am not saying for sure on that

03-26-2003, 03:52 PM	#1
Crab Spirits Leaky Injector Join Date: Sep 2002 Location: Romeoville, IL Posts: 141 Trader Rating: (0) Feedback Score: 0 reviews	Silvia transmissions Probly a noob question, but I've seen a lot of conflicting info on this. Is there a USDM counterpart for the S13 Silvia 5-spd trans? Will a 240sx unit work? What are the differences? __________________ JDM fun

03-26-2003, 04:10 PM	#3
Crab Spirits Leaky Injector Join Date: Sep 2002 Location: Romeoville, IL Posts: 141 Trader Rating: (0) Feedback Score: 0 reviews	I have heard that too, but is a 240 trans the same trans? Will it turn a silvia driveshaft? __________________ JDM fun

03-26-2003, 04:43 PM	#4
RedSuns Nissanaholic! Join Date: Jan 2002 Location: Northern VA Age: 43 Posts: 1,865 Trader Rating: (1) Feedback Score: 1 reviews	the KA and SR tranny are two peice trannys......once you have swapped the bell housing they will match up directly....both the S13/S14 SR tranny will work with the KA(USDM 240SX) driveshaft.....but the S15 tranny requires the front driveshaft from a S15....the S15 has different splines that the S13/S14 SR __________________ Johnathan 2005 Titan 1996 240SX 1991 240SX 1974 260Z 1996 Honda CBR 600 F3

03-26-2003, 05:37 PM	#5
SimpleS14 Post Whore! Join Date: Feb 2002 Location: Philly Age: 42 Posts: 9,185 Trader Rating: (0) Rides Gallery: SimpleS14 Feedback Score: 0 reviews	So you can use a KA tranny with a S13/14 SR? __________________ *Goals are dreams with a deadline.* L.H.O.O.Q.

03-26-2003, 06:01 PM	#7
Dark Zilvia Member Join Date: Jul 2002 Location: Arlington, VA Posts: 165 Trader Rating: (0) Feedback Score: 0 reviews	Is the JDM SR tranny better than the USDM cause I'm not happy with mine or are they exactly the same __________________ 93 Fastback, 5spd with obx shortshifter Power is in the control of strength.

03-26-2003, 04:02 PM	#2
The Mole Leaky Injector Join Date: Jan 2003 Location: Tampa FL Age: 42 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	i believe you have to swap the bell housings from what ive been told -chris p.s. possibly a noob answer too lol

03-26-2003, 06:14 PM	#8
RedSuns Nissanaholic! Join Date: Jan 2002 Location: Northern VA Age: 43 Posts: 1,865 Trader Rating: (1) Feedback Score: 1 reviews	the internal gearing of the SR is different that the gearing of the KA......i will post te differences once i find them __________________ Johnathan 2005 Titan 1996 240SX 1991 240SX 1974 260Z 1996 Honda CBR 600 F3

03-26-2003, 07:16 PM	#9
Jim96SC2 Zilvia Junkie Join Date: Apr 2002 Location: Long Island, NY Age: 43 Posts: 405 Trader Rating: (0) Feedback Score: 0 reviews	I believe that the silvia tranny has double synchomesh also. __________________ Swap DONE: 40K Redtop, Greddy Turbo extension, Greddy DP, Greddy V-SPL FMIC, Greddy Hotpipe, HKS SSQV, Koyo Radiator, Toda Ultralight FW, Spec Stage 2 Clutch, ATS 2-way Diff., Rice-Boy Red Air Filter.

03-26-2003, 09:35 PM	#10
Dark Zilvia Member Join Date: Jul 2002 Location: Arlington, VA Posts: 165 Trader Rating: (0) Feedback Score: 0 reviews	Ok if it does have double synchromesh does that mean that shifting will be much smoother everytime my gear grinds I remeber my freinds VR4 ahhh that was a sweet tranny __________________ 93 Fastback, 5spd with obx shortshifter Power is in the control of strength.

03-27-2003, 03:14 AM	#11
DuffMan Post Whore! Join Date: Oct 2001 Location: in a cardboard box Posts: 2,517 Trader Rating: (0) Feedback Score: 0 reviews	No the gear ratios are the same. CA18 has different gear ratios though. Kind of weird actually, the USDM 240sx had silvia/180sx gear ratios before the silvia/180sx got them.

03-27-2003, 09:24 AM	#13
N1ceDrgn Zilvia Member Join Date: Nov 2002 Location: SoCal Posts: 259 Trader Rating: (0) Feedback Score: 0 reviews	The transmission core's or gear sets are the same. Now whether or not the transmission housings, when you start to swap them in and out will match up I can't say. With mine I had to keep the entire housing to get things to work. Otherwise I'd have to make some changes to my driveshaft. But there are differences in the gears. Both SR and CA from what I have learned are different from the KA transmissions. The differences come into play in the top end or final gears. After changing out my CA transmission core, I haven't been too happy with the KA gear set I am using. I am in the process of acuiring the CA gears and bearings I need to rebuild my original gear set. Back to the subject though, the main differences are in the final gears. As far as mounting, changing out the bell housings should work. __________________ ..working on something that is slowly getting built up and restored..

03-27-2003, 05:15 PM	#14
Crab Spirits Leaky Injector Join Date: Sep 2002 Location: Romeoville, IL Posts: 141 Trader Rating: (0) Feedback Score: 0 reviews	See what Imean by conflicting info? __________________ JDM fun

04-01-2003, 09:44 PM	#15
the head Nissanaholic! Join Date: Jul 2002 Location: in a dark room mastering the art of typing with one hand Posts: 2,164 Trader Rating: (3) Feedback Score: 3 reviews	if you swap the bellhousings it will fit IIRC the first three gears on SR trans have double synchros i am not aware of any other i don't know gear ratios so i am not saying for sure on that __________________ I never knew you could do that with an eggplant