Vitara 2WD V6-2.5L (2004)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
Stator assembly freewheels
If the stator roller clutch becomes ineffective, the stator assembly freewheels at all times in both directions. With this condition, the vehicle tends to
have poor acceleration from a standstill. If poor acceleration problems are noted, what to be checked first are that the exhaust system is not blocked,
the engine is running properly and the transmission is in 1st gear when starting out.
Stator assembly remains locked up
If the stator assembly remains locked up at all times, the engine rpm and vehicle speed will tend to be limited or restricted at high speeds. The vehicle
performance when accelerating from a standstill will be normal. Engine overheating may be noted. Visual examination of the converter may reveal a
blue color from the overheating that will result. Under above conditions, if the converter has been removed from the transmission, the stator roller
clutch can be checked by inserting a finger into the splined inner race of the roller clutch and trying to turn the race in both directions. The inner race
should turn freely clockwise, but be heavy to turn counterclockwise,
NOTE:
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Converter placed with its flange upright does not fit for this inspection.
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For proper checking, position converter with its flange horizontal.
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Turn stator inner race (1) clockwise as quickly as possible with finger, then turn reversely at the same speed and feel difference of inertia. Do not
replace converter for the following conditions:
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The fluid has an odor, is discolored, and there is no evidence of metal particles. There is no indication of existence of internal damage, or oil pump
damage. Dump out as much fluid as possible from the converter and replace only the oil pump screen in the pan.
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A small amount of wear (sometimes referred to as fretting wear appears on the hub where the oil pump drive gear is located. A certain amount of
such wear is normal for both the hub and oil pump gear. Neither the converter nor the oil pump assembly should be replaced.
