1996 Ford Explorer Car Cyclic Vibration At High Speeds

There is a TSB on Explorer's for a vibration at wide open throttle, could be your problem, check for this label to see if this work has been done...5.0L - VIBRATION AT WIDE OPEN THROTTLE TECHNICAL SERVICE BULLETIN Reference Number(s): 96-17-21,  Date of Issue:   August 12, 1996 Related Ref Number(s): 96-17-21 ARTICLE BEGINNING VIBRATION - WIDE OPEN THROTTLE (WOT) BETWEEN 4000 AND 5000 RPMS - 5.0L VEHICLES WITH AWD BUILT THROUGH 4/29/96 APPLICATION Model(s): 1996 Ford Explorer 1997 Mercury Mountaineer Bulletin No.: 96-17-21 Date: August 12, 1996 ISSUE A vibration may be noted during hard acceleration (WOT) with engine rpms between 4000 and 5000. This may be caused by the shift speeds of the automatic transmission and flexing between the transfer case and the transmission. ACTION Use the following procedures based on vehicle build dates to install an automatic transmission-to- transfer case brace and/or reprogram the Powertrain Control Module (PCM). The brace will add stiffness to the transmission-to-transfer case interface and reprogramming the PCM will change the transmission shift speeds. Refer to the following SERVICE PROCEDURE for details. SERVICE PROCEDURE VEHICLES BUILT BEFORE 3/11/96 1. Install a transmission-to-transfer case brace kit. 2. Refer to the Instruction Sheet included in the kit for installation details. The Brace Kit (F67Z-7H101-KA) contains the following:  One (1) Brace Assembly  One (1) Attaching Nut Page 1 of 3 5.0L - VIBRATION AT WIDE OPEN THROTTLE -1996 Ford Explorer 11/2/2008 src="https://images.2carpros.com/forum/automotive_pictures/62217_label_1.jpg" alt="https://images.2carpros.com/forum/automotive_pictures/62217_label_1.jpg" />

Or this one for floor pan vides! 5.0L - VIBRATION IN FLOOR PAN AT WIDE OPEN THROTTLE TECHNICAL SERVICE BULLETIN Reference Number(s): 96-24-16,  Date of Issue:   November 18, 1996 Related Ref Number(s): 96-24-16 ARTICLE BEGINNING VIBRATION - IN FLOOR PAN - AT WIDE OPEN THROTTLE (WOT) AND/OR STEADY HIGHWAY SPEEDS (70+ MPH) - 5.0L VEHICLES WITH ALL-WHEEL-DRIVE (AWD) - EXPLORERS AND MOUNTAINEERS BUILT IN LOUISVILLE THROUGH 7/29/96 AND/OR ST. LOUIS THROUGH 8/12/96 APPLICATION Model(s): Ford Light Truck: 1996 Explorer Lincoln-Mercury: 1997 Mountaineer Bulletin No.: 96-24-16 Date: November 18, 1996 ISSUE Some 5.0L Explorers and Mountaineers may experience a vibration in the floor pan at Wide Open Throttle (WOT) and/or at highway speeds of 113+ km/h (70+ mph) due to the design of the driveshaft. ACTION Replace the front driveshaft and transfer case. The revised driveshaft has a plunging CV joint and the transfer case has been redesigned to accept the revised driveshaft. Refer to the 1996 Explorer Service Manual, Sections 05-01 and 07-07, or the 1997 Explorer/Mountaineer Workshop Manual, Sections 205-01 and 308-07B, for removal and installation procedures. PARTS INFORMATION PARTS INFORMATION OTHER APPLICABLE ARTICLES Part Number Part Name F77Z-4A376-CB F77A-7A195-VA E3TZ- 4A254-A E9TZ-7086-A 389665-S100 Driveshaft Transfer Case U-Joint Strap Gasket - Transfer Case Torx Capscrew Page 1 of 2 5.0L - VIBRATION IN FLOOR PAN AT WIDE OPEN THROTTLE -1996 Ford Explorer 11/2/2008 96-17-21 WARRANTY INFORMATION WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage. OPERATION: 962416A DESCRIPTION: Replace Transfer Case And Front Driveshaft TIME: 1.7 Hrs. DEALER CODING: BASIC PART NO.: 4A376 CONDITION CODE: 36 OASIS CODES: 703000, 703200, 703300 Your Explorer may need BOTH done!