Dodge Nitro. Manual — part 584

Fig. 223: Pinion ID Numbers
Courtesy of CHRYSLER LLC

Ring gear and pinion are supplied as matched sets. Identifying numbers for the ring gear and pinion are painted
onto the pinion gear shaft and the side of the ring gear. A plus (+) number, minus (-) number or zero (0) along
with the gear set sequence number (2) (01 to 99) is on each gear. This first number (1) the amount (in
thousandths of an inch) the depth varies from the standard depth setting of a pinion marked with a (0). The next
two numbers are the sequence number of the gear set. The standard depth provides the best teeth contact
pattern.

2007 Dodge Nitro R/T

2007 DRIVELINE Differential & Driveline - Nitro

Fig. 224: Adjustment Shim Locations
Courtesy of CHRYSLER LLC

Compensation for pinion depth variance is achieved with select shims (4). The shims are placed behind the rear
pinion bearing.

If installing a new gear, note the depth variance number of the original and replacement pinion. Add or subtract
this number from the original depth shim to compensate for the difference in the depth variances. The numbers
represent thousands of an inch deviation from the standard. If the number is negative, add that value to the
required thickness of the depth shims. If the number is positive, subtract that value from the thickness of the
depth shim.

Pinion Gear Depth Variance Chart : Note where Old and New Pinion Marking columns intersect.
Intersecting figure represents plus or minus the amount needed.

PINION GEAR DEPTH VARIANCE

Original Pinion Gear

Depth Variance

Replacement Pinion Gear Depth Variance

-4

-3

-2

-1

0

+1

+2

+3

+4

+4

+0.008 +0.007 +0.006 +0.005 +0.004 +0.003 +0.002 +0.001

0

+3

+0.007 +0.006 +0.005 +0.004 +0.003 +0.002 +0.001

0

-0.001

2007 Dodge Nitro R/T

2007 DRIVELINE Differential & Driveline - Nitro

PINION DEPTH MEASUREMENT

Fig. 225: Pinion Depth Gauge Tools
Courtesy of CHRYSLER LLC

Measurements are taken with pinion bearing cups and pinion bearings installed in the housing. Take

+2

+0.006 +0.005 +0.004 +0.003 +0.002 +0.001

0

-0.001

-0.002

+1

+0.005 +0.004 +0.003 +0.002 +0.001

0

-0.001

-0.002

-0.003

0

+0.004 +0.003 +0.002 +0.001

0

-0.001

-0.002

-0.003

-0.004

-1

+0.003 +0.002 +0.001

0

-0.001

-0.002

-0.003

-0.004

-0.005

-2

+0.002 +0.001

0

-0.001

-0.002

-0.003

-0.004

-0.005

-0.006

-3

+0.001

0

-0.001

-0.002

-0.003

-0.004

-0.005

-0.006

-0.007

-4

0

-0.001

-0.002

-0.003

-0.004

-0.005

-0.006

-0.007

-0.008

2007 Dodge Nitro R/T

2007 DRIVELINE Differential & Driveline - Nitro

measurements with Pinion Gauge Set 6730 and Dial Indicator C-3339A (1).

Fig. 226: Identifying Pinion Block 8540 & Pinion Height Block 6739
Courtesy of CHRYSLER LLC

1. Assemble Pinion Height Block 6739 (2), Pinion Block 8540 (1) and rear pinion bearing onto Screw 6741.

2. Insert assembled height gauge components, rear bearing and screw into housing through pinion bearing

cups.

2007 Dodge Nitro R/T

2007 DRIVELINE Differential & Driveline - Nitro