Detroit EZ Locker installed in a 92 Toyota 4x4 Pickup .
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The following are pre-installation preparations:
Support the vehicle SECURELY. You'll be jerking the vehicle around
so don't skimp on good support stands. Block the from wheels.
Have all necessary tools including torque wrench, breaker bar and
puller which might be needed.
Items such as a new rear gasket (and gasket sealer; i.e. blue goo, if
your worried about leakage), your favorite gear oil, solvent cleaner, penetrating oil (put
it on the night before if it's rusty), razor blade for scraping the old gasket off are good
to have before starting.
Have a good, clean work area to disassemble the rear. We used a
couple of saw horses, planks and a clean piece of cardboard to serve as our work bench in
was not that hard. The Toyota has a third member rear end. First the axels had
to be pulled out a few inches to clear the carrier. We drained the gear oil. The
tires came off and the brake drums were pulled off. Then 4 bolds on the inner side
of the wheel were taken off as well as the cable for the emergency brake. Then I
carefully detached the brake line and wrapped a piece of plastic wrap around the end of
the brake line and wrapped a rubber band around it to keep the fluid in and the dirt and
air out. The axels pulled out without any resistance. Older axels may need a
puller as Mike experienced when doing a CJ-5. Drive shaft was unbolted from the rear
and bungeed up to the frame. We then unbolted the 10 bolts. We had a
little trouble with one of the studs that wouldn't allow the third member to slide out so
two nuts were tightened together on the stud and the stud was backed out, freeing up the
member. Once it was removed the axle housing and the third member were cleaned well
with a solvent where the gasket is seated. I used a razor blade to get the bulk off
and Brake cleaner on a rag to get the rest. Be careful not to get any pieces in the
housing. If you do clean it out. Notice my pooches in the background.
They hung around to check out the action.
Installing the locker.
Disassembling the 3rd member. Rule number
one: Mark everything. The thing that makes the EZ so, well, easy is the fact that
you reuse the carrier and in the case of the Toyota 8" rear you reuse the stock side
gears and the T that the spider gears ride on as well. For most do it yourselfers
it's not as tough as a Locker that replaces the carrier. It differs from a locker that
replaces the carrier, such as a Detriot Locker, in that you don't have to re-mesh the
gears as you would if the ring gear is remounted on a new locker. But in order to do
it right you'll need to put it all back together exactly the way it came
appart. So mark everything, left - right, inner, outer. One thing in
particular is the location of the end caps where the axle slides into the carrier.
They thread into the third member and the U-clamps and hold the carrier in place.
They are lined up just right from factory and you want them put back right were they
are. We counted the visible threads and marked with arrows where they go back.
A small hook-like catch called the adjuster lock is bolted down to hold the end cap from
spinning around. We made sure that hook was place back into the exact same hole with
the same number of threads visible.
want to have the torque specs for the rear when you re-assemble it.
did not. What we did to improvise was to approximately figured out the factory torque
specs. We measure the torque by putting an axle back in the carrier on the bench to hold
it still and starting at 25 pounds and moving up 5 pound increments until the bolt
broke. We did this with several bolts to be better sure we were close. Again,
a better option is to get the torque specs from an advanced manual.
My manual didn't
get into the rear end assembly.
|After the carrier is removed, 8 bolts held the 2 halves together. Again we got
the torque specs the backyard mechanic way so we could torque it back together as close to
factory as possible. After opening the carrier we removed the spider gears.
The cross "T" that the spider gears ride on is reused in the Toyota
8". The two crescent shaped gears gears of the EZ Locker pictured to the right
are installed with the teeth facing the stock side gears within the carrier. They
are installed back to back with the "T" minus the spider gears inserted in
between them. The rings pictured below the EZ Locker's gears ride inside each of the
EZ Lockers gears. Four small guide pins and four small springs are are inserted into
slots on the inner side of each EZ Locker gear. This particular part of the
installation as described in the EZ Lockers installation instructions could have been
elaborated on a little better. The holes that the pins and springs
go into are different on each half of the
lockers gears. The question arises, well which hole gets the spring and which gets
the pin? Thinking logically we assumed that the pin can withstand any shearing
forces so the spring should go into the deeper hole. The deeper hole starts wider
(oval) and then becomes a round hole. This round hole is where the spring lives.
Re-assembling is just a matter of reversing the whole process.
This is where it
is critical to put everything back where it can from and torque all your bolds to the
correct specs. If at this point you do not remember exactly where the rotation of
the side gears was set, you will have to adjust backlash. Check backlash with a dial
indicator. Should be set to .0051-.0071 in. play. If this is not done
correctly you can eat up your rear in no time. After re-assembling the rear and
cleaning the housing we reinstalled the third member into the cleaned axle housing using a
new gasket and ample blue goo.
The whole job from start to finish took about 2 1/2 hours with the help of Mike of www.jeepfan.com who was a big help in the knowledge
|My Review of the Detriot EZ Locker
Relatively straight forward and on the easy side. The instructions
that came with
the locker were simple, to the point and assumed you knew enough about what you were doing
to fill in the blanks; which makes sense. If you do not understand the directions,
you probably shouldn't be attempting to disassemble the rear.
Handling characteristics on paved roads
It handles different than an open rear and takes some getting used to. I've had
to learn to be easy on the gas while turning. A little too much power and the locker
engages. The result is the inner tire breaks free and I go though tires quicker.
But a little chirp now and then is quite fun. On the straight, it's fine.
In a slight curve during a shift or change in acceleration I feel the truck pull to
the left or right depending on acceleration or de-acceleration and the direction of the
curve. Another alteration in my driving habits has been drifting though a turn.
Pre-EZ Locker I would sometimes coast through a turn and apply gas after the turn.
Sometimes doing this after installing the EZ Locker I get some wicked backlash or
bucking of the vehicle as the locker engages and disengages due to the torque of the
backlash itself. I corrected this occurrence by disengaging the clutch before
entering the turn then re-engaging after coming out of the turn. This usually
doesn't happen if I'm accelerating moderately or de-accelerating moderately.
It usually only happen when drifting through a turn at an engine idle speed in whatever
gear. This probably will not happen in an automatic. I have manual trans.
After a period of driving every day I am quite used to it's behavior and my driving
habits have adjust to the point where it's second nature to understand what it will do.
The Detroit EZ Locker performs very well offroad. In the following month after
installing the locker I took it offroad and even though I still got stuck in some thick
mud (bad tires), I must say that I climbed some hills that I formerly could not climb even
with the very worn tires. Almost every situation I encountered it did its job well.
In situations where a tire was off the ground I was able to get power to the tire that was
still firmly planted on the ground while creeping over obstacles without any sudden
engagement. I feel that it was the least amount of money I could spend on the
truck that would reap the largest return on performance. Not a bad investment.
Back to the top
The following project is not intended
to serve as a detailed how-to, step by step instruction manual. Instead it is
intended to serve as a documentation of an installation of an EZ Locker and to pass on any
information that may serve as helpful insight into the installation of an EZ Locker in a
92 Toyota Pickup. Although this project can be done by a moderately mechanically
inclined person, it is not recommended that you attempt to disassemble your rear without
proper knowledge of what you are doing. Any errors in re-assembling can result in
destroying your differential or worse. If you are considering an attempt at
installing an EZ Locker it is recommended that you do your research and if possible have
the help of someone experienced in differentials. Better yet, pay a professional
mechanic to do the work if you have any doubt. It may be cheaper in the end.