Gear, Ring And Pinion: Installation: Installation

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Installing Front Pinion Bearing Cup

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Install new front pinion bearing cup with Installer (special tool #8960, Installer, Bearing Cup) (1) and Handle (special tool #C-4171, Driver Handle, Universal) (2).

Fig 2: Installing Rear Pinion Bearing Cup
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Install new rear pinion bearing cup with Installer (special tool #8959, Installer, Bearing Cup) (1) and Handle (special tool #C-4171, Driver Handle, Universal) (2).

Fig 3: Pinion Depth Shim
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Install pinion depth shim (1) on the pinion gear shaft (2).

Fig 4: Installing Rear Pinion Bearing
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Install rear pinion bearing (4) on pinion (3) with Installer MD998805 (2) and a press (1).

Fig 5: Collapsible Spacer
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Install new collapsible spacer (1) on pinion gear (2).

Fig 6: Installing Pinion Into Housing
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Lubricate pinion and bearings.
Install pinion into housing (2) and place front pinion bearing onto the pinion shaft. Draw pinion shaft into the front bearing with Installer (special tool #8981, Installer, Bearing Cup) (1).

Fig 7: Installing Pinion Seal
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Install new pinion seal with Installer (special tool #8896, Installer, Seal) (2) and Handle (special tool #C-4171, Driver Handle, Universal) (1).

Fig 8: Flange Wrench
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Apply a light coat of Teflon sealant to the pinion flange splines.
Hold the pinion and lightly tap the pinion flange onto the pinion, until a few threads are showing.
Install pinion flange washer and new pinion nut.
Hold pinion flange (2) with Flange Wrench (special tool #8979, Wrench, Pinion Flange) (1) and tighten pinion nut until pinion end play is taken up.

Fig 9: Measuring Pinion Rotating Torque
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Rotate pinion several times to seat pinion bearings.
Measure Pinion Torque To Rotate (1) with an inch pound torque wrench (2). Tighten pinion nut in 6.8 N.m (5 ft. lbs.) increments until pinion torque to rotate is achieved.
Pinion Torque To Rotate is:
- New Pinion Bearings: 1.7 - 2.8 N.m (15 - 25 in. lbs.)
- Original Pinion Bearings: 1.1 - 2.2 N.m (10 - 20 in. lbs.)
Rotate pinion several times then verify pinion torque to rotate again.

Fig 10: Ring Gear, Differential Case & Bolts
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Position ring gear (2) on differential case (4) and start two new ring gear bolts.
Install the rest of the new ring gear bolts and tighten them alternately to seat the ring gear.
Torque ring gear bolts to 237 N.m (175 ft. lbs.).

Fig 11: Installing Exciter Ring
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If exciter ring was removed, position differential assembly on differential Plug (special tool #8888, Plug, Differential Bearing) and place exciter ring on the differential case.
Install exciter ring (1) on the differential case evenly with a hammer and brass punch (2). Drive the ring down until it is seated against the ring gear (3).
CAUTION:
Do not damage exciter ring teeth during installation.
Install differential into the housing.
Measure Total Torque to Rotate (TTTR) with an inch pound torque wrench.
Total Torque To Rotate is:
- New Bearings: 3.4 - 5.6 N.m (30 - 50 in. lbs.)
- Original Bearings: 2.8 - 5.1 N.m (25 - 45 in. lbs.)
  NOTE:
  If TTTR is to high back off adjusters evenly on both sides slightly and check TTTR again. If TTTR is to low tighten adjusters evenly on both sides slightly and check TTTR again.
Verify ring gear backlash and gear contact pattern.