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BJ Transmissions
Transmission types for the BJ

Automatic Transmissions
FN4A-EL
mazda familia
Used with ZL, ZL-DE
ZM, ZM-DE
FP-DE
FS, FS-DE
FS-ZE FP
Type 4AT, FWD 4AT, FWD 4AT,FWD
1st gear 2.816:1 2.816:1 2.816:1
2nd gear 1.497:1 1.497:1 1.497:1
3rd gear 1.000:1 1.000:1 1.000:1
4th gear 0.725:1 0.725:1 0.725:1
Reverse 2.648:1 2.648:1 2.648:1
Final Drive 3.904:1 4.147:1 3.683
Differential open open open
 
GF4-AX-EL
mazda familia
Used with FP-DE ZL-DE
FS-ZE
Type 4AT, 4WD 4AT, 4WD
1st gear 2.800:1 2.800:1
2nd gear 1.540:1 1.540:1
3rd gear 1.000:1 1.000:1
4th gear 0.700:1 0.700:1
Reverse 2.333:1 2.333:1
Final Drive 4.157:1 (Front)
3.909:1 (Rear)
4.375:1 (Front)
3.909:1 (Rear)
Differential
Front: viscous LSD, full time 4WD
Rear: open

Manual Transmissions
F25M-R
mazda familia
Used with B3, B3-ME
ZL, ZL-DE,
ZM, ZM-DE
FP, FP-DE ZL-VE
Type 5MT, FWD 5MT, FWD 5MT, FWD
1st gear 3.416:1 3.416:1 3.416:1
2nd gear 1.842:1 1.842:1 1.842:1
3rd gear 1.290:1 1.290:1 1.290:1
4th gear 0.972:1 0,972:1 (FP)
1.028:1 (FP-DE)
0.918:1
5th gear 0.775:1 0.820:1
(0.775:1 SAfrica FP-DE)
0.731:1
Reverse 3.214:1 3.214:1 3.214:1
Final drive
3.850:1
(4.105:1 ESPEC ZL,ZM)
(4.388:1 SAfrica ZM-DE)
3.850:1
(4.105:1 SAfrica FP-DE)
4.388:1
Differential
open
Mechanism
remote, rod actuation
   
G5M-R
mazda familia
Used with FS in the MP3 MODEL
Type 5MT, FWD
1-5th gear unknown
Final drive unknown
Differential open
Mechanism
remote, rod actuation
   
Special Note: Almost identical with the G15M-R, a direct swap !
Look there for special infos
   
G15M-R
mazda familia
Used with FS, FS-DE, FS-DET, FS-ZE RF (TDI)
Type
5MT, FWD
1st gear 3.307:1 3.454:1
2nd gear 1.842:1 1.833:1
3rd gear 1.310:1 1.310:1
4th gear 0.970:1 0.914:1
5th gear 0.755:1 (0.795 for E-SPEC FS) 0.680:1
Reverse 3.166:1 3.454:1
Final drive 4.105:1 3.409:1
Differential open, 2 way LSD in FS-DET open
Mechanism
remote, rod actuation
     
SPECIAL NOTE: There was a production change on 14.Feb 2002, when the weak parts in the old transmission were replaced by stronger parts (mainshaft,synchros,3/4 gear and more!).


Improved Parts (also for MSP owners):
Speedo Gear: G501-17-341A $9.19
Transmission Lock Nut: F520-17-628 $11.96
Transmission Lock Nut: F521-17-628A $11.14
Oil Seal: F003-27-238B $4.46
Bearings for LSD: G5R0-27-350B $21.15
LSD Itself: GS01-27-190A $448.91

Upgraded Forks:
G501-17-40YA
GC01-17-40XA

Thx for Steve Nack (TurfBurn) from NSN Motorsports for the Information!
   
G25MX-R
mazda familia
Used with ZL-DE
FP-DE
FS-ZE
Type 5MT, 4WD 5MT, 4WD
1st gear 3.666:1 3.666:1
2nd gear 1.833:1 1.833:1
3rd gear 1.310:1 1.310:1
4th gear 0.970:1 0.970:1
5th gear 0.795:1 0.795:1
Reverse 3.454:1 3.454:1
Final Drive 4.388:1 (Front)
3.909:1 (Rear)
4.214:1 (Front)
3.909:1 (Rear)
Differential
Front: viscous LSD, full time 4WD
Rear: Open
Mechanism remote, rod actuation