Powertrax 4120 User Manual
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Introduction
Welcome to the growing family of LOCK-RIGHT owners!
This manual will help you install your new LOCK-RIGHT automatic
100% full-locking differential. When the installation is complete,
your vehicle will have extreme traction! We trust that you will be
pleased with its performance and thank you for your confidence
in our products.
LOCK-RIGHT installation simply involves disassem-
bling and re-assembling the differential case, replacing a few
parts in the process. These instructions are detailed to the
point that a person who is reasonably familar with automotive
work can install a LOCK-RIGHT into a third member in about
three to four hours; please read them carefully before you
start to be sure that you thoroughly understand them. Do not
attempt shortcuts unless you know exactly what you are do-
ing. These instructions also assume that you have the proper
shop manual for reference to instructions about axle removal,
torque values, settings, clearances, etc. that apply to your par-
ticular vehicle. Our manual is a general guide to operations but
does not contain specific information for each vehicle.
We suggest that your first installation be done in the
rear axle. The weight of the engine over the front axle is reduced
by weight transfer to the rear as your vehicle climbs a hill, mean-
ing that more and more weight is being applied to the rear axle,
where the locker is located, as more traction is needed.
Remember: This instruction manual is provided for your
convienience to assist you or your mechanic with the installation
of your new LOCK-RIGHT. However, the ultimate responsibility
for the success of your installation and the subsequent proper
operation of your vehicle rest with you, the vehicle owner.
When your installation is complete, you will have a ve-
hicle with significantly increased capabilities that will be hard to
believe. For continued “fun in the sun,” operate it in a safe and