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NHTSA Engineering Analysis EA88021

Engineering Analysis · TREAD SEPARATION · Opened 1988-02-05 · Closed 1988-08-23

Investigation

Action number
EA88021
Type
Engineering Analysis
Open date
1988-02-05
Close date
1988-08-23
Manufacturer
UNIROYAL TIRE CO.
Affected makes
UNIROYAL
Affected components
SUSPENSION
Affected model years
1985, 1986, 1987
Affected (make, year) variants
3

Summary

SUMMARY OF INFORMATION FROM MANUFACTURER:INFORMATION SUBMITTED BYUNIROYAL DURING THE PRELIMINARY EVALUATION STATED... THERE HAVE BEENOVER 1,000,000 TIRES PRODUCED IN THIS COUNTRY DURING THE PERIOD IN QUESTIONAND TOTAL ADJUSTMENTS FOR ALL REASONS ARE ABOUT .8%.THESE ARE NOTEXTRAORDINARY ADJUSTMENT FIGURES.ANALYSIS:ANALYSIS REVEALS THAT THE ADJUSTMENTS FOR BELT AND TREADSEPARATIONS ARE CONSIDERABLY HIGHER FOR 1985 10 PLY RIB TIRES, INCOMPARISON TO THE 8 PLY RIB AND 8/10 PLY LUG AND RIB TIRES PRODUCEDIN 1986.LT235/75R15 UNIROYAL LAREDOS WERE RECALLED IN DECEMBER, 1986.LT235/85R16 GOODRICH TIRES WERE RECALLED IN JULY, 1987.RECOMMENDATION:SEND AN IR.===

Source

Authoritative
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