We understand that your problem is: 92 Jeep

Transmission (standard):
- 80 weight gear oil but most recomend Redline MT 90 to protect the interals better. 75W90 is listed by some but the 80W is just cheaper to find with no ill effects.
AX-5 = 3.3 quarts
AX-15 = 3.25 quarts
BA-10/5 = 2.45 quarts

If you cannot find one locally rebuilt or new from the dealership, I recommend ordering one online. This company appears to sell your model, though I have never purchased from them before they might be reputable:
http://www.wowautoparts.com/1990/JEEP/WRANGLER/Transmission-Transaxle-Assembly/Manual-Transmission-4-Cylinder/7995.html

Automatic Transmission, 32RH Initial Fill..........4.1 quarts
Automatic Transmission, 30RH Initial Fill..........4.1 quarts
Automatic Transmission, Total Fill
3 speed 32RH..........8.6 quarts
3 speed 30RH..........7 quarts
Manual Transmission, AX-5 2WD..........7.4 pints
Manual Transmission, AX-15 2WD..........6.8 pints
Manual Transmission, AX-15 4WD..........6.8 pints

Engine, with filter..........6.1 quarts [1]
Cooling System, Initial Fill..........10.6 quarts
AMSOIL Antifreeze and Engine Coolant
Automatic Transmission, 30RH Initial Fill..........4.1 quarts
Automatic Transmission, 32RH Initial Fill..........4.1 quarts
Automatic Transmission, Total Fill
3 speed 30RH..........7 quarts
3 speed 32RH..........8.6 quarts
Manual Transmission, AX-5 2WD..........7.4 pints
Manual Transmission, AX-15 2WD..........6.8 pints
Manual Transmission, AX-15 4WD..........6.8 pints
Differential, 181 FBI Front..........2.6 pints [2]
Differential, With 194 RBI Rear..........3.6 pints
Differential, With 216 RBI Rear..........4.1 pints
Transfer Case, 242..........3 pints
Transfer Case, 247..........3.4 pints
Transfer Case, 249..........3.4 pints
Transfer Case, 231..........2.2 pints

i have a 1988 jeep wrangler 6cyl with 5 speed transmission. I was shifting the jeep and it got stuck in third gear. We opened it up and saw that the linkage is aligned and everything is in place. I dont know what is wrong and what to do next. please help ....

These pages cover the transmissions used in Jeeps over the years. Transmissions are arranged by the most recently introduced transmissions first.
Factory Transmissions 45RFE: The 45RFE four speed automatic transmission was used in 1999 Jeep Grand Cherokees with 4.7L engines. 46RE: The 46RE four speed automatic transmission was used in 1998 Jeep Grand Cherokees with 5.9L engines.
44RE: The 44RE four speed automatic transmission was used in 1996 to 1998 Jeep Grand Cherokee's with 5.2L engines.
42RE: The 42RE four speed automatic transmission was used in 1993.3 to 1998 Jeep Grand Cherokees with 4.0L engines.
46RH: The 46RH four speed automatic transmission was used in 1993 to 1995 Jeep Grand Cherokees with 5.2L engines.
32RH: The 32RH three speed automatic transmission was used in 1992 to 1995 Wrangler with 4.0L engine and it continues to be used in 1997+ Wrangler with 4.0L engine.
30RH: The 30RH three speed automatic transmission was used in 1992 to 1995 Wrangler & 1992 to 1996 Cherokee with 2.5L engine.
AW4: The AW4 four speed automatic transmission was used in 1987 to 1990 Jeep Cherokee (XJ), & Jeep Comanche with 2.5L & 4.0L engines. The AW4 was also used in 1987 through 1992 Jeep Comanche & 1991 through 1998 Jeep Cherokee & 1993 through 1993.5 Jeep Grand Cherokee with 4.0L engines.
AX-15: The AX-15 is a medium duty 5 speed manual transmission. It was introduced in mid 1989 in YJs with the 4.2L engine and XJs and MJs with this engine. The first year of the Grand Cherokee (ZJ), the AX-15 was rare option only with the 4.0L engine. The AX-15 is still used in TJs and XJs with the 4.0L engine.
AX-5: The AX-5 (and AX-4, the non-overdrive version) is a light duty 5 speed manual transmission. It was used in all Wranglers from 1987 equipped with the 2.5L I4 engine. It was also used in Cherokees (XJ) and Comanches (MJ) with the 2.8L V6 and 2.5L I4.
BA10/5: The BA 10/5 is a light duty 5 speed manual transmission. It was used in all 4.2L equipped Wranglers (YJ) from 1987 to mid-1989, and all 4.0L Cherokees (XJ) and Comanches (MJ) for the same years.
T-5: The T-5 is a light duty 5 speed transmission used in CJs from 1982 until 1986. It was also found in some 84-85 Cherokees (XJ).
TF727: The TF 727 is a heavy duty 3 speed automatic used in full sized Jeeps (SJs and J series pickups) from 1980-1983. From 1984-1992 the 727 was only used in these trucks with the AMC 360 V8.
999: The 999 is a medium duty 3 speed automatic used in CJs from 1980-1986. It was also used in 1984-1990 SJs and J pickups with the 4.2L engine, in the YJ from 1987-1991 with the 2.5L and 4.2L engine, and in the XJ and MJ through 1986.
904,909: The 904 and 909 are light duty 3 speed automatic used in CJs from 1980-1986 only with the I4 engine. It was also used during this time period with XJs and MJs with the I4 and V6 engine. The 909 is a 904 with a lock-up torque converter.
SR-4, T-4: The SR-4 and T-4 are light duty four speed manual transmissions used in CJs from 1980 until 1986.
T-176, T-177, T-178: The T-176, T-177, and T-178 are a medium duty four speed manual transmission used in Jeep CJs, SJs, and J pickups from 1980-1986.
T-150: The T-150 is the 3 speed manual transmission that was used in CJs from 1976 to 1979.
T-18: The T-18 is a heavy duty four speed used in Jeeps from 1971 until 1981. It was only used in the CJ from 1971-1979.
T-15: The T-15 was used only in V8 equipped CJs and Jeep trucks from 1972 to 1975.
TH400: The TH 400 is a heavy duty three speed automatic that was used in CJs with the BW 13-39 transfer case from 1976-1979. The TH 400 was also used in full sized Jeeps (SJs and J series pickups) from the late 60s until 1979.
T-14: he T-14 is a three speed transmission used with the "Dauntless" Buick V6 and AMC I6 from 1967 to 1975.
T-86: The T-86 is one of the three speeds used with the many CJs and Jeepster Commandos with the "Dauntless" Buick V6.
T-98: The T-98 varies only slightly from the T-18. It was used from the 50s until 1970 in different Jeeps.
T-90: The T-90 was the standard three speed for CJ and their military counterparts built from 1945 until 1971. It was also the standard transmission for Willys Wagons, Willys Pickups, FC trucks, and Jeepster/Commandos during this time period.
T-84: The T-84 is a light duty three speed used in MBs and GPWs during WWII

Good luck!!!

banjo tight 1/8 deflection with 5-10 lbs of pressure

try shifting in to first and then reverse. reverse might be worn out. you can have that gear replaced without replacing the whole transmission.

Hello grega1967, your Jeep Wrangler came from the factory with gear oil in the axles and manual transmission, but the transfer case uses transmission fluid. It is a NP231 and your axles are Dana 30 in the front and Dana 35 in the rear. They should have a 4.10 gear ratio due to you having a 2.5 liter 4 cylinder.

I hope this helps,

map6260

Sounds like you may have bent a shift fork or your cluster gear has some missing teeth on it now. I would venture to say that is it a bent shift fork. This will require the transmission be removed to gain access to inspect and repair.