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 1994-2001 9.25" Ram Axle Specs 
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Corporate 9.25" Rear Axle
Used on 1500 and 2500LD
Axle Type
Semi-floating, hypoid 
Lubricant 
API GL 5, SAE 75W-90
Lube Capacity
4.9 pints ( 2.32 L ) 
Axle Ratio Options
3.21, 3.55, 3.92 

Carrier Split

none
Differential 
Case Clearance 
Case Flange Runout 
Bearing Preload 
...
0.005 in. ( 0.12 mm ) 
0.003 in. ( 0.076 mm ) 
75 ft. lbs. ( 102 N.m ) 
Ring Gear 
Diameter 
Backlash 
Runout 
...
9.25 in. ( 23.50 cm ) 
0.005- 0.008 in. ( 0.12- 0.20 mm ) 
0.005 in. ( 0.127 mm) 
 Pinion Bearing Preload 
Original
New 
  
10-20 in. lbs. ( 1-2 N*m)
15-35 in. lbs ( 2-5 N*m)
 
9 1/4" Axle Torque Specs
Description
Torque
Bolt, Diff. Cover
30 ft. lbs. (41 Nm)
Bolt, Bearing Cap
100 ft. lbs. (136 Nm)
Nut Pinion-Minimum
210 ft. lbs. (285 Nm)
Bolt, Ring Gear
115 ft. lbs. (157 Nm)
Bolt, Backing Plate
40 ft. lbs. (54 Nm)
Bolt, RWAL/ABS sensor
18 ft. lbs. (24 Nm)
Screw, Pinion Mate Lock
8 ft. lbs. (11 Nm)

Axle Description

     The 9 1/4" axle housing consists of a cast iron differential carrier center section with axle tubes extending from the center section sides. The axle tubes are pressed into the differential housing and then welded into position to form a one-piece axle housing.
      The differential case is a one-piece design. The differential pinion mate shaft is retained by a threaded pin. Differential bearing preload and ring gear backlash are set by a collapsible spacer (crush sleeve) on the pinion.
      An option Trac-Lok limited slip differential uses a one-piece differential case, the same internal components as the standard open differential, and an additional pair of clutch disc packs to transfer wheel torque under poor traction conditions.

 

Additional features:

  • A vent hose relieves pressure from lubricant vaporization and internal expansion.
  • Axle shafts are semi-floating and retained by C-clips in the differential side gears.
  • A stamped steel cover on the rear of the center section can be removed for inspection and maintenance.
  • A metal date tag with the gear ratio is attached to two cover bolts.
  • A RWAL brake speed sensor is attached to the upper front of the center section.
  • A RWAL brake exciter ring is pressed onto the ring gear flange.

     
9 1/4" Axle Parts List (see parts diagram for identification)
1- HUB
2- AXLE SHAFT
3- VENT FITTING
4- DIFFERENTIAL HOUSING
5 -CUP
6 -PINION FRONT BEARING CONE
7- NUT
8 - WASHER
9 - COMPANION FLANGE
10- SEAL
11- AXLE SHAFT
12- HUB
13- STUD
14- BEARING CUP
15 -PINION REAR BEARING CONE
16 -DIFFERENTIAL BEARING
17- ADJUSTER
18- LOCK
19- BOLT
20 -BEARING CAP
21- CAP BOLT
22 -BEARING CUP
23 - THRUST WASHER
24 -SIDE GEAR
25- C-LOCK
26- DIFFERENTIAL POSITIONS
27 - THRUST WASHER
28 -COVER
29- PLUG
30- COVER BOLT
31 - WASHER
32- CLIP
33 -SIDE GEAR
34 - THRUST WASHER
35- DIFFERENTIAL BEARING CONE
36- C-LOCK
37- BOLT
38- LOCK
39- BEARING CUP
40- ADJUSTER
41- BEARING CUP
42- BOLT
43- PINION MATE SHAFT
44- EXCITER RING
45- DIFFERENTIAL CASE
46 -RING GEAR BOLT
47- RING GEAR
48- PINION
49 -PINION GEAR DEPTH SHIM
50- BEARING PRELOAD COLLAPSIBLE SPACER
51- SEAL
52- AXLE SHAFT BEARING
53- AXLE SHAFT TUBE
54- AXLE TUBE
55- AXLE SHAFT BEARING
56- SEAL

 


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  Last Update September 18, 2001