1995 nissan truck 2wd, 4 cyl, 5 speed manual: You can move through all the gears when the engine is not running, but when the engine is running you can not get it to go into gear. It seems the clutch is not disengaging, because if you don't crank it in neutral it starts to move. I have removed and bypassed the clutch damper and removed and replaced the clutch master and slave cylinders .

Could be your clutch master cylinder is bad or your transmission is in desire need of loving,yes a rebuild.

INTERNAL TRANS SYNCROS, SLAVE CYLINDER,SHIFTER ADJUSTMENT......CHECK ALL

when did the problem start and what do you mean by difficult to get into gear

CAPACITIES
Engine, 2WDwithout filter..........3.5 quarts[1]
Engine, 4WDwithout filter..........4.0 quarts[1]
Cooling System, Initial Fill..........8.5 quarts
AMSOIL Antifreeze and Engine Coolant
Automatic Transmission, Total Fill..........7.4 quarts
Manual Transmission, 2WD..........4.2 pints
Manual Transmission, 4WD..........8.4 pints
Differential, 2WD Rear..........3.2 pints
Differential, 4WD Rear..........2.7 pints
Differential, Front..........2.7 pints
Transfer Case,..........4.6 pints

1. Add extra oil when replacing filter.
refill check oil level.

TORQUES
Oil Drain Plug.....22-29 ft-lbs
Transfer case
Fill Plug.....18-25 ft-lbs
Drain Plug.....18-25 ft-lbs
Manual Transmission
Fill Plug.....18-25 ft-lbs
Drain Plug.....18-25 ft-lbs

You don't provide much information to go on (type of vehicle, type of engine, 2wd or 4wd, etc.) RPM is always going to be based on the speed you're traveling with a standard transmission. My 4 cyl 5 speed Nissan pickup in 5th gear runs at 3000 RPM at about 75mph.

2000 TOYOTA TACOMA 2.7L 4-cyl Engine Code 3RZ-FE

Engine Oil Grade 1......API* All TEMPS......5W-30 Optional ..10W-30
Engine, 2WD, with filter..........5.5 liters
Engine, 4WD, with filter..........5.4 liters

Manual Transmission,......GL-5/ GL-4 All TEMPS......75W-90
Automatic Transmission,A340E......AF3 / A43D......AF3

Differential, Front/ Rear W/ ADRD......GL-5 ALL TEMPS......75W-90
Differential, Front Less ADRD......GL-5 ALL TEMPS......80W-90

Transfer Case,......GL-4/GL-5 ALL TEMPS......75W-90 Gear oil.

Capacity:
Cooling System, Initial Fill..........8.5 liters
Automatic Transmission, A340E Initial Fill..........1.6 liters
Automatic Transmission, A340F Initial Fill..........2 liters
Automatic Transmission, A43D Initial Fill..........2.4 liters
Automatic Transmission, Total Fill
4 speed A340E..........7.2 liters
4 speed A340F..........10.1 liters
4 speed A43D..........6.5 liters
Manual Transmission, ..........2.5 liters
Differential, With ADRD Front..........1.2 liters
Differential, Without ADRD Front..........1.1 liters
Differential, 2WD V6 Rear..........2.6 liters
Differential, 4WD Extra Long Rear..........2.5 liters
Differential, Short WB With LSD Rear..........2.7 liters
Differential, Short WB Without LS Rear..........2.6 liters
Transfer Case, Electronic..........1.2 liters
Transfer Case, STD..........1 liters

1995 HONDA ACCORD 2.7L 6-cyl Engine Code C27A4 C27A1

Engine Oil Grade 1......API All TEMPS......5W-30
Manual Transmission,......SJ All TEMPS......10W-30, optional 10W-40
Automatic Transmission,MPZA......AF2

CAPACITIES:
Engine, with filter..........4.4 liters
Automatic Transmission, MPZA Initial Fill..........2.7 liters
Automatic Transmission, Total Fill
4 speed MPZA..........6 liters
Manual Transmission, ..........1.9 liters

1995 HONDA ACCORD 2.2L 4-cyl Engine Code F22B1 VTEC

Engine Oil Grade 1......API All TEMPS......5W-30
Manual Transmission,......SJ All TEMPS......10W-30, optional 10W-40
Automatic Transmission,A0YA......AF2

CAPACITIES:
Engine, with filter..........4.3 liters
Automatic Transmission, A0YA Initial Fill..........2.4 liters
Automatic Transmission, MP0A Initial Fill..........2.4 liters
Automatic Transmission, Total Fill
4 speed A0YA..........6 liters
4 speed MP0A..........6 liters
Manual Transmission, ..........1.9 liters

Please ensure that this has gear oil because some of these actually ran regular dexron tranny fluid. If it is gear oil a standard 80w-90 is a good all grade gear oil to run in it.

your luck as with mine is not good. thought I had a bad bearing, after droping the tranny and seperating the housing, I have a broken counter shaft. after looking for another with no luck, the tranny shop informed me that was common for these transmissions. parts are expensive, to rebuild would cost aprox.$800.00 or more. the main cause is the front bearing is supported in alum. causing shaft to move which first takes out the bearing, then the strain snaps the shaft. taking out all gears except 4th and only moves while in 4 wheel drive.

With the vehicle sitting still, ease the clutch out just a little bit while trying to engage reverse. If it pops in, even with a little grinding, it seems the bearings on the counter shaft may be a little stiff. Have you checked the level of the gear lube in the transmission?