Pinion depth setting #
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From: Jefferson Ga
Pinion depth setting #
I'm about to regear my 9.25 to 4.56. I've done several rear axles before including the 9.25 and My question is For the pinion bearing depth difference, do I add the pinion shim thickness from the 3.55 pinion im taking out to the standard pinion depth? For example if The new 4.56 pinion gear is marked with a + or -then 2 . Is that the difference from the standard depth with the factory shim or without?
What i'm asking is do I start with the thickness of the current shim and then add subtract the thousandth number marked on the new pinion gear?
What i'm asking is do I start with the thickness of the current shim and then add subtract the thousandth number marked on the new pinion gear?
Last edited by 97r/tram; Dec 10, 2013 at 12:47 PM.
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1. Loosen the compression nut tool. Lubricate the pinion gear front and rear bearings with gear lubricant. Tighten the compression nut tool to 15-25 inch lbs. (1-3 Nm). Rotate the pinion gear several complete revolutions to align the bearing rollers.
2. On 83/8 in. diameter ring gear axles: Install Gauge Block SP-5383 at the end of SP-526. Install Cap Screw SP-536. Tighten securely with Wrench SP-531.
3. on 91/4 in. diameter ring gear axles: Install Gauge Block SP-6020 at the end of SP-526. Install Cap Screw SP-536. Tighten securely with Wrench SP-531.
4. On 83/8 in. axles, position Crossbore Arbor SP-6029 in the differential housing.
5 On 91/4 in. axles, position Crossbore Arbor SP-6018 in the differential housing.
6. Center the tool. Place a piece of 0.002 in. (0.05mm) shim stock at each end of the arbor tool. Position the bearing caps on the arbor tool. Install the attaching bolts. Tighten the cap bolts to 10 ft. lbs. (14 Nm).
7. Trial fit depth shim(s) between the crossbore arbor tool and gauge block tool. The depth shim(s) fit must be snug but not tight (drag friction of a feeler gauge blade). Depth shims are available in 0.001 in. (0.025mm) increments from 0.020 in. (0.5mm) 0.038 in. (0.96mm).
8. Note the etched number on the face of the drive pinion gear (for example, -0, -1, -2, +1, +2, etc.). The numbers represent thousandths of an inch deviation from the standard. If the number is XXXXXXXX (-), add that value to the required thickness of the depth shims(s). If the number is XXXXXXXX (+), subtract that value from the thickness of the depth shim(s). If the number is X, no change is necessary.
9. Remove the tools from the differential housing.
10. Position the depth shim selected above on the pinion shaft followed by the rear bearing (ensure the Contact surface, bearing and depth shim are clean and without foreign particles). Use Bearing Installer C-4040, or equivalent, for 83/8 in. diameter. Use Sleeve C-3095-A, or equivalent, for 91/4 in. diameter ring gear axles. Force the rear bearing onto the pinion shaft. An arbor press can be used with the installation tool.
11. Lubricate the pinion gear front and rear bearings with gear lubricant. Install the pinion with rear bearings in the housing. Position the bearing replacement collapsible spacer at the end of the pinion gear. Position the pinion gear front bearing at the end of the pinion gear.
12. Install the yoke. On 83/8 in. diameter use Installer C-3718 and Wrench C-3281. On 91/4 in. diameter use Installer C-496 and Wrench C-3281.
2. On 83/8 in. diameter ring gear axles: Install Gauge Block SP-5383 at the end of SP-526. Install Cap Screw SP-536. Tighten securely with Wrench SP-531.
3. on 91/4 in. diameter ring gear axles: Install Gauge Block SP-6020 at the end of SP-526. Install Cap Screw SP-536. Tighten securely with Wrench SP-531.
4. On 83/8 in. axles, position Crossbore Arbor SP-6029 in the differential housing.
5 On 91/4 in. axles, position Crossbore Arbor SP-6018 in the differential housing.
6. Center the tool. Place a piece of 0.002 in. (0.05mm) shim stock at each end of the arbor tool. Position the bearing caps on the arbor tool. Install the attaching bolts. Tighten the cap bolts to 10 ft. lbs. (14 Nm).
7. Trial fit depth shim(s) between the crossbore arbor tool and gauge block tool. The depth shim(s) fit must be snug but not tight (drag friction of a feeler gauge blade). Depth shims are available in 0.001 in. (0.025mm) increments from 0.020 in. (0.5mm) 0.038 in. (0.96mm).
8. Note the etched number on the face of the drive pinion gear (for example, -0, -1, -2, +1, +2, etc.). The numbers represent thousandths of an inch deviation from the standard. If the number is XXXXXXXX (-), add that value to the required thickness of the depth shims(s). If the number is XXXXXXXX (+), subtract that value from the thickness of the depth shim(s). If the number is X, no change is necessary.
9. Remove the tools from the differential housing.
10. Position the depth shim selected above on the pinion shaft followed by the rear bearing (ensure the Contact surface, bearing and depth shim are clean and without foreign particles). Use Bearing Installer C-4040, or equivalent, for 83/8 in. diameter. Use Sleeve C-3095-A, or equivalent, for 91/4 in. diameter ring gear axles. Force the rear bearing onto the pinion shaft. An arbor press can be used with the installation tool.
11. Lubricate the pinion gear front and rear bearings with gear lubricant. Install the pinion with rear bearings in the housing. Position the bearing replacement collapsible spacer at the end of the pinion gear. Position the pinion gear front bearing at the end of the pinion gear.
12. Install the yoke. On 83/8 in. diameter use Installer C-3718 and Wrench C-3281. On 91/4 in. diameter use Installer C-496 and Wrench C-3281.