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INSTALLATION INSTRUCTION
WARNING
Carefully read, understand and follow the instructions provided in this manual, and keep it in a safe place for future reference. If you have any doubt
whatsoever regarding the installation or maintenance of your Rancho suspension system, please see your retailer for assistance or advice. Failure to follow
the warnings and instructions provided herein can result in the failure of the suspension system, or can cause you to lose control of your vehicle, resulting
in an accident, severe personal injury or death.
Rancho Suspension Systems:
RS66505B — 2018-2015 Ford F150 4WD 4.5" Kit
EXCLUDES: Models equipped with 4A (4WD Auto), AWD models, SVT Raptor
Requires replacement Rancho shock absorbers and replacement wheels
(Fits 18" and up OE wheels and spare with OE TIRES ONLY)
See page 4
These instructions should remain in the vehicle glove box for future reference.
89505
Rev C
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Summary of Contents for RANCHO RS66505B
- Page 1 Carefully read, understand and follow the instructions provided in this manual, and keep it in a safe place for future reference. If you have any doubt whatsoever regarding the installation or maintenance of your Rancho suspension system, please see your retailer for assistance or advice. Failure to follow the warnings and instructions provided herein can result in the failure of the suspension system, or can cause you to lose control of your vehicle, resulting in an accident, severe personal injury or death.
- Page 2 7) Install only tires approved by the United States Department of WARNING: READ ALL INSTRUCTIONS THOROUGHLY FROM Transportation (“DOT approved”). Make sure the rim and tire size are START TO FINISH BEFORE BEGINNING INSTALLATION. Failure to properly matched. follow the warnings and instructions provided herein can result in an accident, severe personal injury or death.
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Page 3: Important Notes
Thank you for purchasing the best suspension system available. For the best installed system, follow these instructions. If you do not have the tools or are unsure of your abilities, have this system installed by a certified technician. RANCHO IS... -
Page 4: Specifications And Requirements
ONLY WITH OE TIRES Available Accessories RS60501: Rancho Rear Add-A-Leaf – Provides an additional 1.5” – 2” of lift in rear. If additional rear lift is desired, Rancho Add-A-Leaf RS60501 may be purchased separately. Perfect for towing, the additional weight of a camper, or any time more lift is desired in the rear. - Page 5 R-RM0082-1112 RS770064 Washer, M10 RS780281 Rancho Decal RS860785 Sub Assy, Front Driveshaft Spacer RS780294 Red Rancho Decal, Die Cut RS770256 12pt. M10-1.5 Class 12.9 RS780294B Black Rancho Decal, Die Cut RS770230 M10 Washer, 18MM OD RS176881B Fwd Diff Drop Bracket, Left...
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Page 6: Front Suspension
FRONT SUSPENSION Upper Control Arm Upper Shock Mount Steering Knuckle Steering Knuckle Upper Control Arm Axle Nut Sway Bar Caliper Lower Control Arm Rotor Caliper Lower Shock Mount Lower Control Arm Rotor Tie Rod End Illustration 1 Illustration 2 & S EHICLE REPARATION EMOVAL... - Page 7 Illustration 6 Brake Hose ABS Wire Vacuum Hose Illustration 7 Illustration 8 & L Loosen the nuts at the upper and lower ball joints. TEERING NUCKLE HOCK OWER ONTROL EMOVAL Using Ford Service tool #204-592 separate ball joints from knuckle. Refer to Illustration 7.Separate the ABS wire from brake hose (1).
- Page 8 RONT IFFERENTIAL EMOVAL Passenger Driver Remove the four bolts that attach the cross-member Vent to the lower control arm pockets. Remove the cross- member. See Illustration 10. Transmission Lines Drive Shaft Cross-member Illustration 12 Steering Rack Loosen all three differential mounting bolts. See Diff Aft.
- Page 9 & S RONT IFFERENTIAL UBFRAME NSTALLATION Box RS66505B-1 (Box 1 of 4) Subframe RS176880B Box RS66505B-4 (Box 4 of 4) Left Diff Drop Bracket RS176881B Right Diff Drop Bracket RS176882B 6” Skid Plate RS176884B Minimum Diff Drop Hardware RS860783 Cam Bolt Hardware RS860838 1/2”...
- Page 10 RONT RIVESHAFT PACER NSTALLATION Box RS66505B-4 (Box 4 of 4) Driveshaft Spacer RS176586 Hardware from Sub Assy RS860785 Align index marks on front driveshaft, insert spacer RS176880B RS176586 between driveshaft and pinion flange. Secure together with OE torque plates and 12 point 10mm hardware from kit RS860785.
- Page 11 CAUTION: Follow instructions and warnings supplied with FOR OE FORD SHOCK ONLY. shock absorber. If replacing shock absorbers with Rancho shock absorber WARNING: SPRING IS UNDER COMPRESSION LOAD RS55839 or RS7838, skip to next section - “Shock Absorber WHEN INSTALLED. ATTEMPTS TO REMOVE SPRING Installation”...
- Page 12 Illustration 26 Align the ABS sensor hole to the top of the knuckle and attach the wheel hub to right Rancho knuckle RS176754 with the original bolts. Tighten the bolts to 129 ft. lbs. Align vacuum port upward and attach the integrated Shock wheel end to the knuckle with the original hardware.
- Page 13 RAKE RACKET NSTALLATION Carefully re-shape metal brake lines and attach OE Box RS66505B-4 (Box 4 of 4) brake hose bracket to drop bracket RS176780 with Front Brake line Brackets RS176780 hardware from kit RS860786. See Illustration 29. Hardware from Sub Assy RS860786 Reattach the vacuum line clips to brake line brackets.
- Page 14 XTENSION NSTALLATION RS176579 Box RS66505B-4 (Box 4 of 4) Hardware from Sub Assy RS860749 Insert tube fitting into rubber tube from kit RS860749. Insert other end of tube fitting in OE vent hose. Install lengthened vent hose on differential in OE location.
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Page 15: Rear Suspension
ISER LOCK NSTALLATION Chock front wheels. Raise the rear of the vehicle and RS66505B-4 (Box 4 of 4) support the frame with jack stands. Remove the rear wheels. Riser Blocks RS15104 On the driver side, separate the parking brake cable U-Bolts RS740017 bracket from the bottom of the leaf spring mount. - Page 16 Repeat steps 4 - 5 for the driver side. RS176748 Cross tighten all U-bolt nuts evenly to 85 ft. lbs. Install new Rancho shock absorbers and torque to 66 ft. lbs. Illustration 37 Attach original parking brake cable bracket to RS176748 using 8mm hardware from kit RS860787.
- Page 17 Install rear wheels. RIVESHAFT PACER NSTALLATION Lower vehicle to ground. Tighten the lug nuts to 150 RS66505B-4 (Box 4 of 4) ft. lbs. Sub Assy RS860731 & A INAL HECKS DJUSTMENTS Rear Driveshaft Spacer RS176691 Turn the front wheels completely left then right.
- Page 18 Torque Specs Front Components Rear Components Skid Plate RS176884B 45 ft. lbs Brake Hose Drop Bracket RS176314 12 ft. lbs. Subframe RS176880B to Frame 258 ft. lbs. Parking-Brake Cable Drop Bracket RS176748 12 ft. lbs. Lower Control Arm to Subframe RS176880B 240 ft.
- Page 19 Rancho Technical Department 1-734-384-7804.