Here's the info I have so far:
The 3rd Gen Auto aftermarket low range gears are: 24t and 26.5mm diameter
My case is a 3rd Generation Tcase w/ electronic motor. The early 3rd Gens had the same case/transmission as the 2nd Gen trucks. Specs look right yet the install guide clearly shows a tcase shift lever and Marks4WD says they don't have gears for this tcase. Sure looks like they have what I need tho...
Mitsubishi Vehicle Information for Low Range Gears
GEN 1:
Manual - 24 Tooth spline 26.5mm diameter
Auto - 23 Tooth spline 31mm diameter
The gears are 2.85:1 low range ratio
NA model Jan 83-Nov 84
SWB 2.6 petrol & 2.3 TD 5sp (KM145) only
Hi-roof LWB introduced in May 84 with 2.6 petrol & 2.3 TD
NB model Nov 84-Nov 85 (Same variants as above except 2.3 TD not available with swb)
NC model Nov 85-Oct 86 (Same variants as above except hi-roof lwb is replaced with low-roof version)
ND model Oct 86-Oct 87
SWB 2.6 petrol 5sp (KM145)
LWB 2.6 petrol & 2.5 TD 5sp (KM145)
Optional non lock up 4sp auto (KM148) for 2.6 petrol
NE model Oct 87-Sept 88 (Same variants as above)
2.6 Jap petrol replaced with improved locally Oz made Astron 2 version
NF model Sept 88-Sept 89 (Same variants as above 3.0 V6 introduced for lwb with 5sp (V5MT1) or 4sp auto (KM148)
3 link coil spring rear introduced for lwb 3.0 V6
NG model Sept 89-Apr 91 (Same variants as above except KM148 replaced with lock up 4sp V4AW2)
2.5 TD was intercooled in 1990
Rear disc brakes added with 3 link coil spring rear.
GEN 1 - Engine Power Outputs
2.6 Jap (4G54) - 76Kw 192Nm
2.6 Oz (4G54) - 79Kw 196Nm
2.3 TD (4D55T) - 62Kw 188Nm
3.0 V6 (6G72) - 105Kw 228Nm
2.5 TD (4D56T) - 62Kw 201Nm
2.5 TDI (4D56TI) - 70Kw 240Nm
GEN 1 - Transfer Case & Final Drive Ratio's
2.3 TD - 4.875, 5.29
2.6 / 2.5 TD - 4.625, 4.875
2.5 TDI - 4.625, 4.875
3.0 V6 - 4.625, 4.875
T/case - 1.944:1 low range for 2.6, 2.3 TD & 2.5 TD, 1.925:1 for 3.0 V6
GEN 2:
Manual - 27T spline 30.2mm diameter
Auto - 24T spline 26.5mm diameter
The gears are 2.7:1 low range ratio
NH model Apr 91-Nov 93
SWB 2.6 petrol 5sp (V5M21) leaf springs 3.0 V6 5sp (V5MT1) rear coils
LWB 2.6 petrol 5sp (V5M21) leaf springs 2.5 TD 5sp (V5M21) leaf springs 2.5 TDI 5sp (V5MT1) Rear coils 3.0 V6 5sp (V5MT1) or 4sp auto (V4AW2) rear coils
IMPORT 1993 SWB 2.8ltr TDI Diesel 1993
NJ model Nov 93-Mar 97
Rear leaf springs dropped everything now 3 link coils
SWB 3.0 V6 5sp (V5MT1) or 4sp auto (V4AW2)
LWB 2.8 D 5sp (V5M21) 2.8 TDI 5sp (V5M31) 3.0 V6 5sp (V5MT1) or 4 sp auto (V4AW2)
Luxury Exceed model 3.5 DOHC V6 lwb 4 sp auto (V4AW3
Sep 95 3.5 DOHC V6 made standard across range (3.0 V6 dropped)
NK model Mar 97-Oct 97
SWB 3.5 DOHC V6 5sp (V5M31) or 4sp auto (V4AW3)
LWB 2.8 TDI 5sp (V5M31) 3.5 DOHC V6 5sp (V5M31) or 4sp auto (V4AW3)
NL model Oct 97-Jul 00 (known as Gen 2.5 in US)
SWB same as NK
LWB same as NK except 3.5 DOHC V6 replaced with 3.5 SOHC V6
GEN 2 - Engine Power Outputs
2.6 Oz (4G54) - 79Kw 196Nm
3.0 V6 (6G72) - 109Kw 234Nm
2.5 TDI (4D56TI) - 73Kw 240Nm
2.8 D (4M40) - 71Kw 198Nm
2.8 TDI (4M40) - 92Kw 292Nm
3.5 DOHC V6 (6G74) - 153Kw 300Nm
3.5 SOHC V6 (6G74) - 140Kw 303Nm
GEN 2 - Transfer Case & Final Drive Ratio's
2.6 - 4.875
2.5 TD & 2.5 TDI - 4.875, 5.29
3.0 V6 - 4.625, 4.875
2.8 D - 4.875
2.8 TDI - 4.90
3.5 DOHC V6 - 4.636
Transfer Case - 1.925:1 low range for 2.6, 2.5 TD, 2.5 TDI & 3.0 V6, 1.90:1 for 2.8 TDI & 3.5 DOHC V6
GEN 3: LEVER SELECT 4WD (Same transfer case as GEN 2)
Manual - 27T spline 30.2mm diameter
Auto - 24T spline 26.5mm diameter
The gears are 3.15:1 low range ratio
Standard gear tooth count, Input gear 19T, Idler gear 25T x 18T, Output 26T
NM model Jul 00-Oct 02 (monocoque body / IRS)
SWB model dropped from the range.
LWB 2.8 TDI 5sp (V5M31) 3.5 SOHC V6 5sp (V5M31) or new 5sp tiptronic auto (V5A51 Invecs 2)
Aug 02 3.2 DID introduced (2.8 TDI dropped)
GEN 3: ELECTRONIC 4WD SELECT (Push Button on Dash)
Manual - 27T spline 30.2mm diameter
Auto - 24T spline 26.5mm diameter
NP model Oct 02-Oct 06
Traction / stability control introduced
LWB 3.5 SOHC V6 5sp (V5M31) or 5sp auto (V5A51) 3.2 DID 5sp (V5M31) or 5sp auto (V5A51)
Oct 03 3.8 SOHC introduced only with 5sp auto (V5A51)
Jan 05 MATT (Mitsu All Terrain Technology) introduced across model range.
GEN 3 - Engine Power Outputs
2.8 TDI (4M40) - 92Kw 292Nm
3.5 SOHC V6 (6G74) - 140Kw 303Nm
3.2 DID (4M41) - 121Kw 373Nm
3.8 SOHC V6 (6G75) - 150Kw 314Nm
GEN 3 - Transfer Case & Final Drive Ratio's
2.8 TDI - 4.90 5sp man
3.2 DID - 3.90 5sp auto or 4.10 for 5sp man
3.5 SOHC V6 - 4.30 5sp man & 5sp auto
3.8 SOHC V6 - 4.30 5sp auto
Transfer Case - 1.90:1 for all
GEN 4:
Manual - 27T spline 30.2mm diameter
Auto - 24T spline 26.5mm diameter
The gears are 3.15:1 low range ratio
The transfer case is the same as the GEN 3 models
NS model Oct 06-
New body and interior reintroduction of SWB
Optional rear diff lock
Introduction of MIVEC 3.8 SOHC V6
Introduction of common rail injection and DPF on 3.2 CDI
Transmissions the same as Gen 3
GEN 4 - Engine Power Outputs
3.8 SOHC V6 MIVEC (6G75) - 184Kw 329Nm
3.2 CDI (4M41) - 118Kw 378Nm (auto) 125Kw 358Nm (5sp)
GEN 4 - Transfer Case & Final Drive Ratio's
3.8 SOHC V6 MIVEC - 4.30 5sp man and 5sp auto
3.2 CDI - 4.10 5sp man or 3.917 for 5sp auto
Transfer Case - same as Gen 3
http://www.marks4wd.com/low-range-gears/mitsubishi.html
