ReadyLift 69-20250 User manual

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69-20250-IM-AA
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MON-FRI 7AM-4PM PST
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WEBSITE: ReadyLIFT.COM
**Please retain this document in your vehicle at all times.**
IF your ReadyLIFT® product has a damaged or missing
part, please contact customer service directly and
a new replacement part will be sent to you immediately.
For warranty issues, please return to the place of
installation and contact ReadyLIFT.
Limited Lifetime Warranty
This unique product warranty proves our commitment to the quality and reliability of every product that
ReadyLIFT manufactures. The ReadyLIFT product warranty only extends to the original purchaser of any
ReadyLIFT product, if it breaks, we will give you a new part. Warranty does not apply to discontinued parts.
Our Limited Lifetime Warranty excludes the following ReadyLIFT items; bushings, bump stops, ball joints, tie
rod ends, heim joints and shock absorbers. These parts are subject to wear and are not considered defective
when worn. They are warranted for 12 months from the date of purchase for defects in workmanship.
This product warranty is voided if the vehicle is not aligned after kit installation and proper maintenance is
routinely done.
Product purchased directly from ReadyLIFT has a 90 day return policy on uninstalled products from the date
of purchase (may be subject to restocking fee). Uninstalled product returns must be in the original
ReadyLIFT packaging. Please call [phone] to get an RGA# for any return. Customer is responsible
for shipping costs back to ReadyLIFT. Returns without RGA# will be refused. Contact ReadyLIFT
directly about any potentially defective parts prior to removal from vehicle.
ReadyLIFT products are NOT intended for off-road abuse. Any damage or failure as a result from off-road
abuse voids the warranty of the ReadyLIFT product. ReadyLIFT is NOT responsible for any subsequent
damages to any related vehicle parts due to misuse, abuse, improper installation, or lack of maintenance.
Furthermore, ReadyLIFT reserves the right to change, modify or cancel this warranty without prior notice.
69-20250 Ford Super Duty Tremor SST Kit

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269-20250-IM-AA
READ INSTRUCTIONS THOROUGHLY AND COMPLETELY BEFORE BEGINNING INSTALLATION.
INSTALLATION BY A CERTIFIED PROFESSIONAL MECHANIC IS HIGHLY RECOMMENDED.
READYLIFT® IS NOT RESPONSIBLE FOR ANY DAMAGE OR FAILURE RESULTING FROM IMPROPER INSTALLATION.
Safety Warning
MISUSE OF THIS PRODUCT COULD LEAD TO INJURY OR DEATH.
Suspension systems or components that enhance the on and off-road performance of your vehicle may cause
it to handle differently than it did from the factory. Extreme care must be used to prevent loss of control or
vehicle rollover during abrupt maneuvers.
Always operate your vehicle at reduced speeds to ensure your ability to control your vehicle under all driving
conditions. Failure to drive safely may result in serious injury or death to driver and passengers.
Driver and passengers must ALWAYS wear your seat belts, avoid quick sharp turns and other sudden
maneuvers. ReadyLIFT Suspension does not recommend the combined use of suspension lifts, body lifts, or
other lifting devices.
You should never operate your vehicle under the influence of alcohol or drugs.
Constant maintenance is required to keep your vehicle safe. Thoroughly inspect your vehicle before and after
every off-road use.
It is the responsibility of the retailer and/or the installer to review all state and local laws, with the end user
of this product, related to bumper height laws and the lifting of their vehicle before the purchase and
installation of any ReadyLIFT products.
It is the responsibility of the driver/s to check their surrounding area for obstructions, people, and animals
before moving the vehicle.
All raised vehicles have increased blind spots; damage, injury and/or death can occur if these instructions are
not followed.
.
Installation Warning
All steps and procedures described in these instructions were performed while the vehicle was properly
supported on a two post vehicle lift with safety jacks.
Use caution during all disassembly and assembly steps to insure suspension components are not over
extended causing damage to any vehicle components and parts included in this kit.
Included instructions are guidelines only for recommended procedures and are not meant to be definitive.
Installer is responsible to insure a safe and controllable vehicle after performing modifications.
ReadyLIFT Suspension recommends the use of an OE Service Manual for model/year of vehicle when
disassembly and assembly of factory and related components.
Unless otherwise specified, tighten all bolts and fasteners to standard torque specifications listed within the
OE Service Manual.
Suspension components that use rubber or urethane bushings should be tightened with the vehicle at normal
ride height. This will prevent premature wear or failure of the bushing and maintain ride comfort.
Larger tire and wheel combinations may increase leverage on suspension, steering, and related components.
Due to payload options and initial ride height variances, the amount of lift is a base figure. Final ride height
dimensions may vary in accordance to original vehicle ride height. Always measure the vehicle ride height
prior to beginning installation.
SAEJ2492 Warning
By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this
vehicle may handle differently than that of factory-equipped vehicles. As with any vehicle, extreme care must be used to
prevent loss of control or roll-over during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely,
recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely
may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling
characteristics and are confident of your ability to maintain control under all driving conditions. Some modifications (and
combinations of modifications) are not recommended and may not be permitted in your state. Consult your owner’s
manual, the instructions accompanying this product, and state laws before undertaking these modifications. You are
responsible for the legality and safety of the vehicle you modify using these components.

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369-20250-IM-AA
Due to payload options and initial ride height variances, the amount of lift is a base figure. Final ride height
dimensions may vary in accordance to original vehicle ride height. Always measure the vehicle ride height
prior to beginning installation.
A lifted vehicle may have different headlight aim performance. ReadyLIFT recommends marking and
recording the headlight beam position before kit installation and then adjusting, if necessary, the headlamps
to the same height settings after kit installation. Set the vehicle on a level surface 10' to 15’ from a solid wall
or garage door. (This is a general distance with some manufacturers requiring different distances.) Note the
top height of the low beam's bright spot, the top of the most intense part of the beam, for driver and
passenger side. Height may vary from side to side. Repeat this procedure and adjust after lift kit is
installed. Adjust if the aim is off by turning the adjusters gradually (a quarter of a turn) and looking to see
where the new alignment falls. It may be easier to block one headlamp while adjusting the other. Consult
the owner operation manual for procedures to adjust headlights - many automakers offer headlight aiming
specs. Some states have their own specifications when it comes to headlight aim, so it’s best to follow those
rules when alighting headlights.
This suspension system was developed using a 37” x 12.5” tire with 20” x 9” wheel
and a offset of +25. If wider tires are used, offset wheels may be necessary and
trimming may be required. Factory wheels can be used but are not recommended
with tires over 11” wide.
The stock spare rim can be run in an emergency - exercise extreme caution under
stock spare tire operating conditions. Please note that, if running the spare factory
tire, it is done for short distances and a speed not to exceed 45mph or damage to
differentials may occur.
IMPORTANT NOTE:
Caster Bushings that come in the kit may not be necessary. Install
Caster Bushings if it is not possible to get caster within
recommended specs.

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469-20250-IM-AA
PRE-INSTALLATION MEASUREMENTS:
It is imperative that you record the following measurements and factory components
in the tables below. ReadyLIFT tests and records as much data from each application
as available at the time of product development. Vehicle manufacturers may change
components or add models with different options. Recording and not exceeding the
fender-to-hub-center ReadyLIFT calls out will ensure the lift on the vehicle is correct.
These measurements will affect the performance of this lift kit. Failure to ensure
proper stock conditions may result in over lifting, causing premature failure of axles,
CV boots and drivetrain. Over lifting a vehicle will also result in an incorrect wheel
alignment. This will wear tires incorrectly. Incorrect alignment will cause poor vehicle
handling issues including but not limited to under steer. Over lifting will also cause a
shock top off condition resulting in poor ride quality accompanied by pops and clunks
which are symptoms of prematurely wearing components.
Failure to adjust head lamps may cause dangerous driving conditions for you and
other drivers on the road. Record the head lamp position before the installation of this
lift or leveling kit and adjust to original factory position after the completion to ensure
a safe and enjoyable experience.
VEHICLE HEIGHT MEASURMENTS
**MEASUREMENT IS TO BE PERFORMED FROM CENTER OF HUB TO FENDER
EDGE STRAIGHT UP FROM HUB.**
RECORD HEAD LAMP MEASURMENTS
Driver
Before
Driver
After
Passenger
Before
Passenger
After
Front
Rear
Driver
Before
Driver
After
Passenger
Before
Passenger
After

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569-20250-IM-AA
BILL OF MATERIALS
Before starting installation: ReadyLIFT Suspension highly recommends that the installation of this
product be performed by a professional mechanic with experience working on and installing suspension
products. Professional knowledge and skill will typically yield the best installation results. If you need an
installer in your area, please contact ReadyLIFT Suspension Customer Service or check out the dealers tab
on our Website for authorized installers .
INSTALLATION BY A PROFESSIONAL IS HIGHLY RECOMMENDED.
• A Factory Service Manual for your specific Year / Make / Model is highly recommended for reference
during installation.
• All lifted vehicles may require additional driveline modifications and / or balancing.
• A vehicle alignment is REQUIRED after installation of this product.
• Speedometer / Computer recalibration is required if changing +/- 10% from factory tire diameter.
• A vehicle lift or hoist greatly reduces installation time. Installation time estimates are based on an
available vehicle hoist.
• Vehicle must be in excellent operating condition. Repair or replace any and all worn or damaged
components prior to installation.
COMPONENTS QTY
Spring Spacer 2
Urethane Isolator 2
Shock Extension 2
Radius Arm Drops 2
Radius Arm Crush Sleeves 4
Sway Bar Drop 2
Track Bar Bracket 1
Bump Stop Extension 2
Brake Line Bracket Driver 2
Brake Line Bracket Passenger 2
Front Caster Bushing Kit 1
Driver Rear Block 1
Passenger Rear Block 1
U-Bolt 4
U-Bolt Nut 8
HARDWARE QTY
5/16” x 3/4” Bolt (Brake Line) 2
5/16” Washer (Brake Line) 4
5/16” Locking Nut (Brake Line) 2
7/16” x 1 1/2” Bolt (Sway Bar Bracket) 4
7/16” Washer (Sway Bar Bracket) 8
7/16” Locking Nut (Sway Bar Bracket 4
M8 x 70mm Bolt (Bump Stop Extension) 2
M8 Washer (Bump Stop Extension) 2
M14 x 70mm Bolt (Shock Extension) 2
M14 Washer (Shock Extension) 4
M14 Locking Nut (Shock Extension) 2
M18 x 130mm Bolt (Radius Arm Drop) 4
M18 Washer (Radius Arm Drop) 8
M18 Locking Nut (Radius Arm Drop) 4

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669-20250-IM-AA
ReadyLIFT recommends all steps and procedures described in these instructions be
performed while the vehicle is properly supported on a two post vehicle lift with
safety jacks.
Otherwise, park vehicle on a clean flat surface and block the rear wheels for safety.
Engage the parking brake.
Disconnect the vehicle power source at the ground terminal on the battery.
Lock the steering wheel in the straight forward position with the column lock or
steering wheel locking device.
Raise the front of the vehicle and support with safety jack stands at the factory
recommended locations.
Support the axle with a suitable jack.
Remove the radius arm from the frame.
Rotate the axle until there is enough
clearance to install the ReadyLIFT radius
arm drop brackets.
Install the ReadyLIFT radius arm drop
brackets into the frame using M18 x
130mm bolts, washers, crush sleeve, and
nuts. Do not tighten at this time.

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Rotate the axle until you can line up the
radius arms into the ReadyLIFT drop
brackets. Install using factory hardware.
Do not tighten at this time.
Remove the brake line bracket at the
frame. Remove the brake line bracket at
the axle.
Remove the lower shock from the axle
mount.
Remove the sway bar from the frame.

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869-20250-IM-AA
Remove the track bar from the factory
bracket. Remove the factory track bar
bracket from the frame.
Install the ReadyLIFT track bar bracket to
the frame using factory hardware. Torque
to 95 ft-lbs. Install the track bar to the
ReadyLIFT bracket using factory hardware.
Do not tighten at this time.
Lower the axle enough to remove the front
springs. Install the ReadyLIFT urethane
isolator, spring spacer, and then factory
rubber isolator onto the spring. Raise the
axle enough to hold the spring assembly in
place.
Install the ReadyLIFT sway bar drops to
the frame using factory hardware. Torque
to 35 ft-lbs. Install the sway bar to the
ReadyLIFT sway bar drops using the 7/16”
x 1 1/2” bolts, washers and nuts. Torque to
35 ft-lbs.

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969-20250-IM-AA
Install the ReadyLIFT shock extensions to
the axle using factory hardware. Install the
shock to the ReadyLIFT shock extensions
using the M14 x 70mm bolt, washers and
nuts. Torque to 45 ft-lbs.
Reattach the factory brake line bracket at
the axle using factory hardware. Torque to
5 ft-lbs.
Install the ReadyLIFT bump stop spacer
and factory bump stop mount to the frame
using M8 x 70 mm bolt and washer.
Torque to 5 ft-lbs. Install the bump stop to
the factory mount by pressing it back into
place.
Install the wheels and lower the vehicle to
the ground. Torque the wheels to the
manufacturer specs. Jounce the suspension
a few times to settle to the new ride
height. Torque the radius arm brackets and
arm bolts to 200 ft-lbs, and track bar to
250 ft-lbs.

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1069-20250-IM-AA
Block the front wheels for safety. Using a
suitable jack, raise the rear axle up and
place jack stands on the frame in front of
leaf hangers. Support the axle with jack.
Remove the rear wheels. (Not necessary,
but can make the install easier)
Slightly loosen but do not remove the
passenger side u-bolts. Remove the driver
side u-bolts completely and discard.
Lower the axle just enough to remove the
factory block and install the ReadyLIFT
block, making sure not to over extend
brake and ABS lines. Adjust as necessary.
Rear Installation
Block the front tires and raise the rear of the vehicle using a suitable jack.
Support with jack stands at each frame rail in front of the rear leaf spring hangers.

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1169-20250-IM-AA
Prior to installing wheels, complete all installation steps on the opposite side. Install
the wheels and lower the vehicle to the ground. Torque the lug nuts to the wheel
manufacturers specs. Jounce the vehicle to settle the suspension to the new ride
height. Torque the u-bolts to 110 ft/lbs.
Reconnect the battery ground terminal. Start the vehicle and turn the steering wheel
lock to lock and verify all clearances between tire, body and suspension components.
Adjust as necessary.
Have wheel alignment performed by qualified alignment technician. Have the
alignment set to the recommended specs at the end of the instructions.
Locate the driver side lift block (Has a D
cut into it under the bump stop tang).
Raise the axle and the block up to the
spring while aligning the center pin. Install
the provided u-bolts, and nuts. Snug the u
-bolt nuts but do not fully tighten at this
time. Repeat steps for passenger side.
If equipped with a 2 piece driveline,
remove the bolts holding the carrier
bearing to the frame. Install the
ReadyLIFT carrier bearing spacer between
the carrier bearing and frame using 7/16”
bolts, washers and nuts. Torque to 50 ft-
lbs.

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1269-20250-IM-AA
FAILURE TO PERFORM THE POST INSPECTION CHECKS MAY RESULT IN VEHICLE
COMPONENT DAMAGE AND/OR PERSONAL INJURY OR DEATH TO THE DRIVER
AND/OR OTHERS.
Final Checks & Adjustments
Once the vehicle is lowered to the ground, check all parts which have rubber or urethane components to
ensure proper torque. Torque lug nuts to the wheel manufacturer specs. Move vehicle backwards and
forwards a short distance to allow suspension components to adjust. Turn the front wheels completely left
then right and verify adequate tire, wheel, brake line, and ABS wire clearance. Test and inspect steering,
brake and suspension components for tightness and proper operation. Inspect brakes hoses and ABS lines for
adequate slack at full extension, adjust as necessary.
RECHECK ALL HARDWARE FOR PROPER TORQUE VALUES AFTER 500 MILES, AND THEN
PERIODICALLY AT EACH SERVICE INTERVAL THERAFTER.
Vehicle Handling Warning
Increasing the height of your vehicle raises the center of gravity and can affect stability and control. Use
caution on turns and when making steering corrections.
Vehicles with larger tires and wheels will handle differently than stock vehicles. Take time to familiarize
yourself with the handling of your vehicle.
Wheel Alignment/Headlamp Adjustment
It is necessary to have a proper and professional wheel alignment performed by a certified alignment
technician. Align the vehicle to factory specifications. It is recommended that your vehicle alignment be
checked after any off-road driving.
In addition to your vehicle alignment, for your safety and others, it is necessary to check and adjust your
vehicle headlamps for proper aim and alignment. If the vehicle is equipped with active or passive safety/
collision monitoring and/or avoidance systems including, but not limited to, camera- or radar-based systems,
check and adjust your vehicle’s systems for proper aim and function.
RECOMMENDED ALIGNMENT SPECS
Front Driver Passenger Tolerance Total / Split
Camber -0.3 +0.3 +/- 0.5 +0.0
Caster +2.5 +2.5 +/- 0.5 +0.0
Toe +.05 +.05 +/-0.05 +.20
IMPORTANT NOTE:
Caster Bushings that come in the kit may not be necessary. Install
Caster Bushings if it is not possible to get caster within
recommended specs.