1998 NISSAN GT-R manual transmission

IDENTIFICATION INFORMATION
Model Variation
Model
Body Grade Engine Transmission Rear differential carrier
RH drive
GGKBRTFR34UDA FS5R30A
2-door 25GT TURBO
RB25DET
. R200V
GGKBRTAR34UDA
RE4RO1
B
RB20DE
GGHAREARMEDA
1 GGKAREFRMEDA 1 RB25DE
GGKAREARMEDA
GGKBRTFRMUDA
25GT TURBO
RB25DET R200V
GGKBRTARMUDA
RE4RO1 B
BGHAREFR34EDA FS5W71 C
20GT
RB20DE
BGHAREARMEDA RE4RO1 B R200
i%
I
BGKBRTFR34UDA FS5R30A $#i 25GT TURBO RB25DET
R200V
BGKBRTAR34UDA RE4RO1 B
Prefix and suffix designations:
A: Standard
- 1 TEG, TDestlon' U: intercooler turbocharger
Model
F:
&speed
manual transmission
A: 4-speed automatic transmission
20GT,
25GT,
25GT-X T: 25GT TURBO
k: Right-hand drive
2WD B: 2WD
+ ELECTRIC SUPER HlCAS
GH:
RB20DE
GK:
RB25DE, RB25DET
4-door Sedan G: 2-door Coupe

TCSIABS SYSTEM
System
Description
ABS FUNCTION
During ABS operation, the brake pedal pulsates along with a mechanical noise. This ensures that the ABS
is working properly. mP
When starting up the engine or immediately after the vehicle starts to run, the brake pedal pulsates and G'
a motor noise from the engine compartment can be heard. They are caused by the ABS operation check
and should not be considered abnormal.
A vehicle with the ABS may stop in a longer distance than a vehicle without the ABS when the brake is
EC
applied on a bad road, gravel road, or deep fresh snow.
TCS FUNCTION
TCS/ABS control unit monitors the speed of the driving wheels through 4 wheel speed sensors. If driving
wheel slip is detected, fuel to the engine is cut
ol
and the throttle valve is adjusted so that the engine
a
torque is reduced. On vehicles with automatic transmission, transmission shift schedule is also changed
to control the rear wheel driving torque, which results
in the reduction of wheel slip. This system enables
the throttle valve to be controlled so that optimum engine torque can be achieved in accordance with the
driver's acceleration request.
The driver may not feel satisfied with acceleration on some road surfaces. This poor acceleration occurs
because the operating TCS gives priority to maintaining optimum traction. Therefore, this condition should
R8
be considered normal.
When shiftdown is made or the acceleration pedal is depressed while the vehicle is driven on the road
surface that has different friction coefficients, the TCS may operate temporarily.
r-- 4 Lrd[-i
On vehicles with manual transmission, the SLlP indicator lamp and the TCS OFF indicator lamp may light
up when the engine is about to stall in the conditions shown below.
If the lamps go off when engine speed
increases, there is no problem in the system.
At start, the engine almost stalls and the engine speed is much lower than the idle speed.
The vehicle is driven at an extremely low speed with a high-speed gear engaged.
The clutch has been engaged until the vehicle almost stops. 8D
FAIL-SAFE FUNCTION
ABS system
If any malfunction is detected in the system, the ABS warning lamp, the TCS OFF indicator lamp and the SLlP
indicator lamp in the instrument panel is turned on with the TCSIABS deactivated and the vehicle's brake sys-
tem reverts to normal operation.
TCS system
If any malfunction is detected in the system, both the SLlP indicator lamp and the TCS indicator lamp on the
instrument panel light up and the TCS is shut down. The vehicle operates in the same manner as a vehicle
without the
TCS, while the ABS is operational.
If there is a malfunction in the throttle control system, the TCS becomes inoperative while the ABS
remains functional.
When fail-safe operation is activated, perform the self-diagnosis procedure for the TCSIABS first.
Refer to
BR-27 for details.

SERVICE DATA
SECTION SD
CONTENTS
L ] RB20DE (UB) [I 17 FS5R30A 1-
ENGINE MECHANICAL ............................................... 2 MANUAL TRANSMISSION ........................................... 10
-1 RB25DE /I
ENGINE MECHANICAL .................................................. 4
17 RB25DET I]
ENGINE MECHANICAL .................................................. 6
CLUTCH.. . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . .. . . . .+.. . . . . . . . . . -8
71 FS5W71C
MANUAL TRANSMISSION
.................... ......................... 9
AUTOMATIC TRANSMISSION ........................... .......... 12
TRANSFER .............. ......... ..... .. ... ........ . . ............. 18
PROPELLER SHAFT ................................................. 19
FRONT FINAL DRIVE ................................................. 20
REAR FINAL DRIVE ..................................................... 22
DRIVE SHAFT ............................................................... 24
AXLE & SUSPENSION ................................................. 25
ROAD WHEEL AND TIRE ............................................. 27
BRAKE. ... ...... . .. ... . .... . . . . . .... . .. .. . . .. . . .. . . . .. . . .. ... .. .. . . . . . . . . .. .... . -28
STEERING ........... ............. ..... ... ............... ...... ................ 29
SUPER HICAS ............................................................ 30

MANUAL TRANSMISSION
BACKLASH ADJUSTING SHIMS
Measurement height
mm
--
Items
Main drive gear
1st gear
2nd gear
3rd gear Thickness
mm Standard mm
0.05 - 0.10
0.05
- 0.20
0.05
- 0.20
0.05
- 0.20
Selective parts Parts number
Counter shaft
front bearing
4th gear I -
5th gear 1 0.05 - 0.20 Ail
BAULK RlNG CLEARANCE Reverse idler gear 1 0.05 - 0.20
END PLAY Measurement
position
2nd and 3rd
Inner baulk ring clearance 'an
1 st gear 1 0.31 - 0.41
Items
2nd gear
1 0.11-0.21
Standard
mm
3rd gear 1 0.11 - 0.21
Outer
baulk ring
lnn'er baulk ring
7 4th gear 5th gear
Reverse idler gear
Counter gear Main drive gear end play
Mainshaft high-synchro side
Rear end of mainshaft end bearing
SNAP RlNG
- -
0.24 - 0.41
0.05
- 0.50
0
- 0.16
0
- 0.13
0 - 0.18
0
- 0.14
4th and 5th ( 1.20 - 1.60 1 Less than 0.8
Selective parts
Thickness
mm I Parts number - -- Reverse gear 1 1.10 - 1.55 1 Less than 0.7
Main drive gear
TIGHTENING TORQUE
Unit: N.m (kg-rn)
Counter drive gear
I
TIM side to 40 - 49
Transmission to engine mounting bolt Engine side to 30
- 39
TIM side (3.0 - 4.0) I High-synchro side 32263 V5200 1 32263
"5201
Rear end of shaft I I
Mainshaft 1.1
32228 20 1 00

MANUAL TRANSMISSION
END PLAY SNAP RING AND C-RING
Items I Standard mm Selective parts --
1st gear I 0.23 - 0.33
2nd gear
I 0.23 - 0.33 I
5th gear I 0.23 - 0.33
3rd gear
I
Reverse gear I 0.33 - 0.43
0.06
- 0.16 Main
drive gear
4th gear
-
--
Reverse idler gear
Counter gear
Mainshaft (rear) 0.30 - 0.53 Mainshaft (front) 0.10 - 0.25 --
Main drive gear end play
Mainshaft (front) end play
Mainshaft (rear) end play
Counter gear (front) end play
Counter gear (rear) end play
Counter gear (rear) 0 - 0.10
0
- 0.10
0
- 0.10
0.10
- 0.25
0
- 0.10
Thickness mm Parts number
32348 01G15
32348 01 GOO
32348 01
GO1
32348 01
GO2
32348 01 GO3
32348 01
GO4
32348 01
GO5
32348 01
GO6
32348 01 GO7
32348 01 GO8
32348 01 GO9
32348
01G10
32348 01G11
32348 01 G12
32348 01
GI 3
32348 01G14

MANUAL TRANSMISSION pmtq
THRUST WASHER BAULK RING CLEARANCE
Selective parts I Thickness mm I Parts number
Counter gear
(front)
Reverse idler Measurement
position
,
Ist, 2nd and 3rd (double cone)
lnner baulk ring clearance "a*
Outer baulk ring clearance
"bn
3221
8
01
GOO
32218
01G11
3221
8
01G12
32218
01G13
32218
01G14
32218
01G04
32218
01G15
32218
01G16
3221
8 01 GI7
32284
01G10
3228401G11
Outer baulk ring L,
Syncf
cone
4th and 5th
lnner baulk ring
MTA0004D
Reverse gear
Reverse baulk ring
clearance
"cn
Reverse cone
Standard mm Wear
limit
mm
Less than
0.2
Less than
0.2
EC
Less than &$ 0.7
Less than
0.7
--
TIGHTENING TORQUE
Unit: N.m (kg-m)
1 TIM side to 1 40 - 49
Transmission to engine
mounting bolt Engine side to
30 - 39
I T/M side 1 (3.0 - 4.0)