All JA transaxles have a torque capacity of 136 lb.
ft. The gear ratios of each transaxle are shown in the
following chart. The chart also shows which transax-
les are available with the reverse–input shaft brake.
This brake allows easier shifting into reverse and
helps eliminate reverse gear clash.
GEARSHIFT PATTERN
The NV T350 (A-578) transaxle shift pattern is a
modified H–pattern (Fig. 4). Overdrive fifth and
reverse gears are in–line and outboard of the first
through fourth gear positions.
DESCRIPTION AND OPERATION
GEARSHIFT LEVERS
The shift levers are serviceable in the vehicle. The
shift levers are different from each other and do not
interchange.
AXLE SEALS
The axle shaft seals are identical for both sides of
the differential and will interchange.
DIAGNOSIS AND TESTING
COMMON PROBLEM CAUSES
The majority of transaxle malfunctions are a result
of:
• Insufficient lubrication
• Incorrect lubricant
• Misassembled or damaged internal components
• Improper operation
HARD SHIFTING
Hard shifting may be caused by a misadjusted
crossover cable. If hard shifting is accompanied by
gear clash, synchronizer clutch and stop rings or gear
teeth may be worn or damaged.
Misassembled synchronizer components also cause
shifting problems. Incorrectly installed synchronizer
sleeves, struts, or springs can cause shift problems.
NOISY OPERATION
Transaxle noise is most often a result of worn or
damaged components. Chipped, broken gear or syn-
chronizer teeth, and brinnelled, spalled bearings all
cause noise.
Abnormal wear and damage to the internal compo-
nents is frequently the end result of insufficient
lubricant.
SLIPS OUT OF GEAR
Transaxle disengagement may be caused by mis-
aligned or damaged shift components, or worn teeth
on the drive gears or synchronizer components. Incor-
rect assembly also causes gear disengagement.
LOW LUBRICANT LEVEL
Insufficient transaxle lubricant is usually the
result of leaks, or inaccurate fluid level check or refill
method. Leakage is evident by the presence of oil
around the leak point. If leakage is not evident, the
condition is probably the result of an underfill.
If air–powered lubrication equipment is used to fill
a transaxle, be sure the equipment is properly cali-
brated. Equipment out of calibration can lead to an
underfill condition.
CLUTCH PROBLEMS
Worn, damaged, or misaligned clutch components
can cause difficult shifting, gear clash, and noise.
A worn or damaged clutch disc, pressure plate, or
release bearing can cause hard shifting and gear
clash.
GEAR
1st 3.54
2nd 2.13
3rd 1.36
4th 1.03
5th 0.72
FINAL DRIVE 3.94
REVERSE BRAKE YES
CLUTCH RELEASE
SYSTEM
CABLE
Fig. 4 NV T350 (A-578) Shift Pattern
JA TRANSAXLE 21 - 3
GENERAL INFORMATION (Continued)
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