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TSB
96-23-20
  • DRIVELINE - "CLUNKING" OR "GRUNTING" NOISE DURING ACCELERATION OR STOPPING - 4X4 - 1992-96 F-150/F-250 UNDER 8500 GROSS VEHICLE WEIGHT (GVW) AND 1992-95 F-250/F-350 OVER 8500 GVW
Publication Date: NOVEMBER 4, 1996

LIGHT TRUCK:
1992-1995 F-350
1992-1996 F-150, F-250

This TSB article is being republished in its entirety to revise model year coverage and part listing.

ISSUE:

A "clunking" or "grunting" noise from the driveline during acceleration or stopping may be heard on some vehicles. This may be caused by engine torque preventing the slip yoke from sliding smoothly on the transmission output shaft splines. At the same time, rear suspension wrap-up overcomes slip yoke-to-output shaft friction causing sudden driveshaft motion. This can result in a clunk or grunt noise.

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