I’ve heard concerns over changing trans fluid at high mileage, hate to do that if I can’t verify it was done at least once in the trucks 90k life… unsure
Don't be afraid of fluid and filter change, just don't ask for a flush that can dislodge stuff and create other issues. And 92k on a 12 is not what I would call HIGH mileage..
I think 11 and 12 have a Recall TSB on the driveshaft. Maybe yours was not done.
RAPTOR—DRIVELINE CLUNK OR CHIRP/SLIP/BUMP TSB 11-5-7
ON ACCEL OR STOP—BUILT ON OR BEFORE
03/12/2011
FORD:
2011 F-150
ISSUE WARRANTY STATUS: Eligible Under Provisions Of
Some 2011 F-150 Raptor vehicles built on or before New Vehicle Limited
3/12/2011 may exhibit excessive clunk or a Warranty Coverage
chirp/slip/bump condition from the driveshaft on IMPORTANT: Warranty
acceleration from a stop or when bringing the coverage limits/policies are
vehicle to a stop. not altered by a TSB.
Warranty coverage limits ACTION are determined by the
Follow the Service Procedure steps to correct the identified causal part.
condition.
OPERATION DESCRIPTION TIME
SERVICE PROCEDURE 110507A 2011 F-150 Raptor: 0.4 Hr.
Replace The Rear
1. Remove and discard the existing driveshaft Driveshaft Assembly. (Do
assembly. Refer to Workshop (WSM), Section Not Use With Any Other
205-01 Removal and Installation labor Operations)
Driveshaft-Rear, One Piece. DEALER CODING
2. Install the updated driveshaft assembly. Refer CONDITION
to WSM, Section 205-01 Removal and BASIC PART NO. CODE
Installation Driveshaft-Rear, One Piece. 4841 42
PART NUMBER PART NAME
BL3Z-4602-J Driveshaft 145! Wheel Base
BL3Z-4602-H Driveshaft 133! Wheel Base
N800594-S100 Driveshaft Flange Bolt (4 Req)