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Old 04-08-2009, 10:19 PM
paul poirier paul poirier is offline
67 Nova 400sbc.4L60
 
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The purpose of the booster springs is release the clutch plates quicker on a downshift, either 4/2 or 3/2. GM Put them their for proper calibration. as far as the low reverse plates . their is a GM bulletin as well as an aftermarket repair for low reverse clutch fatigue. It is caused from the plates releasing too slowly when going from a reverse to drive manuever. In 1996 the manual valve and spacer plates were changed to correct this . the aftermarket drills a small exhaust hole in the low reverse piston too help exhaust oil after the shifter is put to drive range . However they leave the low reverse checkball out. (the one in the case capsole.
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