Thread: Six speed RS6F51H / A Part info Gear ratios Final Drive Maxima Sentra Specv P12

I am going to update this thread with any RS6F51 information. Parts, gear ratios, final drive, etc.. If you have anything to add please post it or PM me.


Sentra SpecV 2002-2003

1st Gear: 3.416
2nd Gear: 1.944
3rd Gear: 1.258
4th Gear: 0.947
5th Gear: 0.772
6th Gear: 0.630
Reverse: 3.252
Final Drive: 4.428

-------------------------------

Sentra SpecV 2004-2006

1st Gear Ratio 3.153
2nd Gear Ratio 1.944
3rd Gear Ratio 1.392
4th Gear Ratio 1.055
5th Gear Ratio 0.809
6th Gear Ratio 0.673

Final drive 4.13:1
--------------------------------

Maxima 2002-2003

1st Gear Ratio 3.153
2nd Gear Ratio 1.944
3rd Gear Ratio 1.392
4th Gear Ratio 1.055
5th Gear Ratio 0.809
6th Gear Ratio 0.63 - Service manual info (I believe it may be .673 but will check stacks in the garage to verify)

Final drive 3.81:1

Maxima 2004-2006

1st Gear Ratio 3.153
2nd Gear Ratio 1.944
3rd Gear Ratio 1.392
4th Gear Ratio 1.055
5th Gear Ratio 0.809
6th Gear Ratio 0.63 - Service manual info (I believe it may be .673 but will check stacks in the garage to verify)

Final drive 4.133:1
---------------------------------
Primera P12 20V 2002-2007

Input shaft 1st to 6th
13/18/28/36/42/49

Output shaft
41/35/39/38/34/33

1st Gear Ratio 3.153
2nd Gear Ratio 1.944
3rd Gear Ratio 1.392
4th Gear Ratio 1.055
5th Gear Ratio 0.809
6th Gear Ratio 0.673

Ring 76t - Pinion 16t
Final drive = 4.75:1
-----------------------------------------

Clutch/Flywheel options

Stock P12 Primera 20V flywheel and clutch

Gspec (GregV) Flywheel accepts KA 240sx 225mm clutch

OS Giken S15 Super single aluminum cover (400hp) 225mm - Requires 1x extra block plate for spacing

Exedy Super single NH02SD1 S15 aluminum cover - Requires 1x extra block plate for spacing

ORC 659D twin disc clutch/flywheel (640hp) - Requires 5x extra block plate for spacing, also modify axle carrier bracket.

Competition Clutch twin disc SR20 6 speed conversion - (3 month build wait time from date of order)

How different are the RS6F52H transmissions? The 52H comes in the B16 Spec-V and 2014+ Juke Nismo RS and have HLSD.

Juke Nismo RS
model code 3YW0D
1st gear ratio 3.727
2nd gear ratio 2.043
3rd gear ratio 1.392
4th gear ratio 1.055
5th gear ratio 0.865
6th gear ratio 0.732
Reverse ratio 3.641

Final drive ratio 4.428


B16 Spec-V
Model code ET85D
1st gear ratio 3.153
2nd gear ratio 1.950
3rd gear ratio 1.392
4th gear ratio 1.055
5th gear ratio 0.809
6th gear ratio 0.630
Reverse ratio 3.002

Final drive ratio 4.428

I wish I could get my hands on one. I'm sure the P12/SR20 bell wouldn't move over to the RS6F52.

Only thing I can confirm is shifter mechanism that sticks out of the transmission is shaped different from 51H to 52H. Maybe guts can transfer?


The 52H is pretty strong, and gearing is "close ratio" for the Juke Nismo RS. In my '14 RS I am making 257hp/300 lb-ft at the wheels on stock turbo and haven't had any issues yet during track days or roll/drag racing.

[URL=""][/URL]
38411-8u000 helical diff to suit

[URL=""][/URL]

an aussie found a plated diff in a 51a he imported from japan. it is believed to be an OS Giken one.

There is some incorrect information regarding the 2003 Spec V Gear Ratios. I picked one up and after opening it up i counted the teeth and it has the same exact gear ratios as the 2004-2006 Spec V's.

Input shaft 1st to 6th
13/18/28/36/42/49

Output shaft
41/35/39/38/34/33

1st Gear Ratio 3.153
2nd Gear Ratio 1.944
3rd Gear Ratio 1.392
4th Gear Ratio 1.055
5th Gear Ratio 0.809
6th Gear Ratio 0.673

Ring 62t - Pinion 15t
Final drive = 4.133:1

I did some more research and after looking at multiple 2003 Sentra Spec V's Stickers that show the VIN with the "Trans Axle" info, all showed it was the "RS6F51H FX41" which is 4.133 Final Drive. If you click on the link below and scroll down to the last image, it is an image of the VIN sticker.

https://cpprohomeoh.car-part.com/image?seller=1470&partGUID=D70C6344-89FB-479D-848C-5332A6D4DA8E&vehicleGUID=291A805C-8D6A-493A-ADE6-230A852C830A&display=2003%20Nissan%20Sentra%20Transmission-Stock%23%20B140111#

Here is a Vin sticker with tranny info for a 2002 Sentra Spec V and it shows Axle FX44, Click on link below and it is also the very last image which

https://cpprohomeoh.car-part.com/image?seller=1470&partGUID=9FCD2190-1EC5-43DE-9E94-C0C0BBE1E12D&vehicleGUID=B8863A5E-B3B5-4667-BBAE-FBC83EC090B7&display=2002%20Nissan%20Sentra%20Transmission-Stock%23%20B120555#

If you look at the 2nd image it is the plate on the firewall of a 2002 Maxima and for "Trans Axle" it shows "RS6F51H FX38" which is the 3.8 Maxima Final Drive

https://cpprohomeky.car-part.com/image?seller=3593&partGUID=AC6BE38E-467D-4429-8DC0-2A115A49AB8E&vehicleGUID=83014540-CDE1-4470-B0F7-96ACD8BF180C&display=2002%20Nissan%20Maxima%20Transmission-Stock%23%20030313#

Hope this helps someone in the future.

Good find! I'll have to look at the pillar tag next time I grab a few more 6 speeds!

Good info, Edgar. Thank you sir!!!

Also, if the stickers are still on the transmission, it will have a model code and that alone will tell you exactly which variant transmission you have.

I have pulled probably 6 trannys and never seen a sticker or tag on any of them. Would be a lot easier to identify that way though.