11001 Deluxe Pinion Depth Gauge Checker Tools For GM Ford Chrysler Dana 30-80

Deluxe Pinion Depth Gauge Checker Tool Kit Compatible With GM 10 12
Bolt, Ford 7.5” 8” 8.8” 9”, Chrysler 8 3/4”, Dana 30 35 44 50 60
70, and Most Differentials

The pinion depth checker kit is a very accurate method of setting
pinion depth in a large number of automotive differentials. Alternative
for T&D Machine Products 11001 Deluxe Pinion Depth Checker.

This deluxe pinion depth checker tool kit includes 1 travel dial
indicator, 3 extensions with calibration tubes, two pair of hubs that
have three diameters each, 2 target plates and 1 precision ground cross
shaft.

Comes in a handy high-impact resistant carrying case.

INSTRUCTIONS FOR THE DELUXE PINION DEPTH CHECKER KIT INTRODUCTION

CALIBRATION

Note: Each of the three included calibration tubes is calibrated and sealed for each application.

1) lmportant: Before attempting calibration, carefully clean all parts. Any dirt can prevent a correct calibration.

2) Insert the Dial lndicator into the Cross Shaft with the Dial
lndicator on the rounded side of the shaft and tip extending thru the
flat area on the opposite side. Snug the setscrew making sure not to
over-tighten.

3) Remove the
Indicator Extension stored inside the appropriate Calibration Tube and
screw the extension tip into the Dial lndicator until snug.

4) Hold the Cross Shaft and indicator assembly with the indicator tip
pointed up. Slip the calibration tube over the tip and allow the tube to
rest on the flat area on the cross shaft.

5)The thousandth (long arm) pointer should rotate clockwise slightly
(about 0.020”) and be pointed approximately straight down, or in the 6
o’clock position. If the pointer does not point straight down, loosen
the set screw in the cross shaft and raise or lower the indicator until
the needle is pointed straight down with the calibration tube in place.
Tighten the setscrew until snug (excessive tightening will lock the
indicator shaft or permanently bend the housing) and make sure the
pointer remains pointing straight down.

NOTE: Be sure that the short pointer (small dial) is in the “zero” position.

6) Loosen the indicator bezel lock screw and with the calibration tube
in place, make the final adjustment by rotating the dial face until the
zero aligns with the pointer. Tighten the indicator bezel lock screw.
Your Pinion Depth Checker is now set and calibrated for a depth of
exactly 3.375”(Or 1.900″ for the Ford 9” or 2.500” for the intermediate
differentials). This is the CALIBRATED DEPTH.

MEASURING PINION DEPTH

1) Carefully remove any sharp edges or burrs from the carrier bearing
housing and caps to avoid any inaccuracy or marring of the hubs.

2) Make note of the pinion depth inscribed on your pinion gear. If your
pinion does not have a depth number on it, go to the “OEM GEAR
APPLICATIONS” Section to find the pinion depth.

3) Place the pinion in the case with the appropriate bearings and shims.

4)Clean the appropriate Target Plate and the face of the pinion gear
and then place the Target Plate on the face on the pinion.

5) Select the appropriate hubs and lightly oil the bores to prevent
galling and carefully insert the Cross Shaft into the Hubs. Place this
assembly in the case and tighten main cap bolts to 25 ft.-lbs. See
picture for Hub Applications.

NOTE:
The “A” diameter has a machined flat to clear the pinion support in Ford
9″ rear ends. Additional relief may be needed for individual
applications. When using the “A” diameter in Dana 60s, the machined flat
should be positioned at 90 degrees to the cap parting line.

6) Slide the Indicator and Cross Shaft as close as possible to pinion
gear, minimizing any overhang of theTarget Plate. Be sure to retract the
indicator plunger shaft just enough to clear the Target Plate to
prevent bending the indicator.

7)
Make sure the Indicator shaft end is seated on the target plate and note
the reading on the dial. Multiply the small counter number by 0.100″
and add the thousandths pointer reading to get your INDICATOR READING.
Subtract your lNDICATOR READING from the CALIBRATED DEPTH (3.375 for the
long calibration tube, 2.500 for the intermediate, and 1.900 for the
short) and you will have obtained your MEASURED PINION DEPTH.

Example: lf the reading on the indicator were 0.778″ (seven complete
revolutions plus reading), subtracting from 3.375 would equal 2.597″.
This is the MEASURED PINION DEPTH.

NOTE: To minimize error, rotate the pinion gear to at least four
different positions and average the three most similar readings.

8) Compare the MEASURED PINION DEPTH to the Pinion Depth number
inscribed on the pinion gear or obtained from the OEM Gear Section to
determine the amount of shims to be added or removed.

OEM GEAR APPLICATIONS

The list provided on this page will extend the capabilities of your
PiNION DEPTH CHECKER KIT. The method described below will allow you to
set up differentials with gears not inscribed with a pinion depth, as is
the case with OEM factory gears.

1)
Measure the PINION HEAD THICKNESS (PHT) with a micrometer. This
thickness is defined as the dimension from the top of the pinion gear to
the thrust bearing mounting surface.

2) Find the correct application listed below and note the MASTER HOUSING DIMENSION (MHD).

3) Subtract the (PHT) from the (MHD).The number obtained is the PINION DEPTH (PD).

4) Now, you can set up your differential as described in the section “MEASURING PINION DEPTH”.

• FOR GENERAL MOTORS

10-Bolt 7.2 (3.693 MHD), 10-Bolt 7.5 (3.787 MHD), 10-Bolt 8.2 × 25
Spline Pinion (4.175 MHD), 10-Bolt 8.2 × 27 Spline Pinion (4.175 MHD),
10-Bolt 8.2 x Thin 55-64 Vette (4.125 MHD), 10-Bolt 8.5 × 30 Spline
(4.262 MHD), 10-Bolt 8.5 × 27 Spline (4.262 MHD).

12-Bolt 8.875× 1.438 Pinion Dia. (4.556 MHD), 12-Bolt 8.875 × 1.625
Pinion Dia. (4.670 MHD), 12-Bolt 9.300 (4.620 MHD), 14-Bolt 9.500(4.865
MHD), 14-Bolt 10.500 (5.400 MHD).

• FOR CHRYSLER

10 Bolt 8.250 (4.124 MHD), 12 Bolt 8.750× 1.750 Pinion Stem (4.350
MHD), 12 Bolt 8.750 × 1.875 Pinion Stem (4.344 MHD), 12 Bolt 9.250
(4.625 MHD).

• FOR FORD

6.625 (3.500 MHD), 7.5 (4.040 MHD), 8.0 (4.000 MHD), 8.8 (4.415 MHD), 9.0 (4.375 MHD).

• FOR DANA

Dana 30 (3.625 MHD), Dana 35 (3.813 MHD), Dana 44 (4.312 MHD), Dana 50
(4.630 MHD), Dana 60 (5.000 MHD), Dana 70 (5.375 MHD), Dana 80 (5.812
MHD).