Pinion Setting Tool Instructions
tool is designed to work with aftermarket gears that have the checking distance
marked on the pinion head. It does not work with oem. gears which do not contain
the checking distance info.
- Clean and remove any
burrs or paint from the top of the pinion head.
- Mount the head bearing
on to the pinion shaft and install in the housing without the pinion seal or
crush sleeve. Tighten the pinion nut enough to take up the slack in the
- Place the pinion
setting tool on top of the pinion head with the slot end of the tool in the
carrier bearing journal. (fig. 3,4,5) The end of the tool will rest against
the end of axle tube surface.
- With the tool being
held by your left hand firmly against the top of the pinion head and the
slotted end touching the face of the axle tube, insert the dial caliper with
your right hand into the slot and position the depth rod so it touches the
bottom of the carrier bearing journal. (fig. 6)
- Take the measurement
from the dial caliper and subtract it from the dimension printed on the tool.
The answer is the current checking distance of the pinion gear. Add the
appropriate amount of shims to arrive at the number marked on the end of the
pinion gear by the manufacturer.
Click here for Pinion Setting
Calculate Checking Distance for Gears that do not
have the number etched on the pinion head.
Part Number Description
***Click on Part Number to Order***
8.2 Chevrolet (64-72) Rear Cover
8.2 Chevrolet (55-64) Drop out center section
8.5 GM (1970-1997) carrier brg. LM501314
8.5/8.625 GM (1998-up) carrier brg. LM603012
12 Bolt GM (auto) (1965-72)
10010 12 Bolt GM (truck)
*will work for installing
Ford OEM. or Ford SVT
gear sets.(see note below)
10013 Ford 9"
(2.891 and 3.062 brg, sizes)
Dana 44 (1967 - 2006 ) does not work on high
pinion front axles
Dana 60 does not work on high
pinion front axles
****** As an engineer,
I appreciate how you guys have come up with such a simple tool to replace
thousand-dollar super complicated pinion depth tools. I was very excited when
I found that you guys had an easy answer for taking the "black magic" out of
pinion depth measurements for the average person. Even the fancy Rotuda pinion
depth tools the dealer uses assume a published dimension for the housing,
right? So even if their $2500 tool is the most accurate and repeatable thing
ever, there will still be error induced from the housing deviating from the
published values? It seems silly to use such outrageously expensive tools if
the measurement is really only as good as the housing.
****** The tool looked surprisingly simple, yet,
it appeared to accomplish the task, so, I ordered it, and had it sent to his
house. When he finally got the opportunity to use it, he was truly amazed by the
way it worked and he got the tooth contact pattern "dead-nuts" on the first try.
This weekend, the third member was installed and the car road tested. I'm happy
to report that the gears have never been quieter, and he is extremely happy with
Thanks again for your speedy delivery and manufacturing such a well designed