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GRIP PRO INSTALLATION MANUAL

7

17. Inspect differential bearings and 

replace if needed. Always replace 

both the cup and cone as a set from 

the same manufacturer.

 

18. Thoroughly clean the differential 

bearing hubs and ring gear mounting 

flange prior to installation of the 

bearings and ring gear.

19. Install the differential bearing 

cones onto the bearing hubs of the 

differential case using the proper 

installation tool. See 

Figure 4

.

Note: 

Many Dana® applications use 

shims between the bearing cone 

and the differential case bearing hub 

shoulder. The bearing cones must be 

removed to make adjustments to the 

shim pack thickness.

20. For adjuster nuts, skip to Step 23.

21. Install differential with the bearing 

cups and shims into the differential 

housing. Adjust the shim pack as 

necessary to create a slip fit of 

the differential into the differential 

housing. A slip fit is the thickest 

shim pack that can be installed by 

hand with slight resistance. It will be 

necessary to rotate the differential 

case after each shim thickness 

change to seat the bearings.

 

22. Remove the differential from the 

differential housing. Measure the 

combined thickness of the shims. This 

total shim thickness is what is needed 

for installing the differential (prior to 

adding preload to the bearings).

23. Heat the ring gear and anti-lock 

tone wheel (if applicable) with a heat 

lamp or by submersing in hot water. 

Do not exceed 300º F. Do not use a 

torch!

24. Install anti-lock tone wheel (if 

applicable) while hot onto the outside 

diameter of the differential ring gear 

flange as stated in the vehicle service 

manual.

25. Install the ring gear while hot onto 

the differential. Use pilot studs to align 

the ring gear to the differential as 

shown in 

Figure 5

.

Figure 4

Figure 5

Summary of Contents for Grip Pro

Page 1: ...INSTALLATION MANUAL POWERTRAX COM ...

Page 2: ...S SUPPLIED MAY DIFFER THE TRADEMARKS OF OTHERS REFERRED TO HEREIN ARE OWNEDBYTHEIRRESPECTIVECOMPANIESANDARENOTAFFILIATEDINANYWAYWITHMIDWESTTRUCK AUTOPARTS INC GDP ISATRADEMARKAND WORLD AMERICAN MOTIVE GEAR MOTIVE GEAR PERFORMANCE EXCEL AND EZ LINK ARE REGISTERED TRADEMARKS OF MIDWEST TRUCK AUTO PARTS INC USEOFTHE INCONNECTIONWITHAMARKOFMIDWESTTRUCK AUTOPARTS INC INDICATESTHATTHEMARKISREGISTEREDINA...

Page 3: ...lical cut gears to transfer power to the wheel with the most traction Always use an 80W 90 mineral petroleum based gear oil with at least a GL 5 rating Synthetic oil and oils that contain friction modifiers are NOT recommended SPECIAL NOTES All Powertrax Grip Pro limited slip carriers require a certain amount of resistance with the ground to start to the power transfer A Grip Pro differential will...

Page 4: ...ring gear which determines the backlash of the ring and pinion set When installing a differential the backlash should be set to the original backlash setting measured prior to disassembly To increase the backlash adjust the shim packs or threaded adjusters to move the ring gear further away from the drive pinion gear To decrease backlash move the ring gear closer to the drive pinion gear Bearing p...

Page 5: ...e non C clip style do the following A Remove axle shaft bearing retaining plate nuts and remove the retaining plate B Use a slide hammer to remove the axle shafts Be careful not to damage the oil seals Note Some axles use shims or adjuster nuts to set the axle shaft end play Refer to the vehicle service manual for the proper removal and installation procedures for the axle shafts 5 For removable c...

Page 6: ...lot and remove 12 Remove anti lock brake tone wheel if applicable Consult vehicle service manual for proper procedure 13 Remove differential bearing cones from the differential using the proper bearing puller and adapter See Figure 3 14 Clean all parts in a suitable cleaning solvent and dry thoroughly Clean axle housing by pushing a clean rag through the axle tube with a wooden rod Push the rag fr...

Page 7: ...ck as necessary to create a slip fit of the differential into the differential housing A slip fit is the thickest shim pack that can be installed by hand with slight resistance It will be necessary to rotate the differential case after each shim thickness change to seat the bearings 22 Remove the differential from the differential housing Measure the combined thickness of the shims This total shim...

Page 8: ...n Step 6 and adjust as needed To increase backlash remove shim thickness from the ring gear side and add an equal amount of shim thickness to the opposite side To decrease backlash add shim thickness to the ring gear side and remove an equal amount of shim thickness from the opposite side Note approximately 001 of shim equals 001 of backlash 32 Once the correct backlash reading has been establishe...

Page 9: ...juster and tightening the RH adjuster the same amount Decrease backlash by loosening the RH adjuster nut and tightening the LH adjuster nut the same amount When making adjustments always make the final adjustment in the tightening direction For example if the adjuster need to be loosened one notch loosen it two notches and tighten it one When the proper backlash has been established install the ad...

Page 10: ...ing back into the side of the carrier Make sure snap ring is properly seated before continuing If your axles are non C clip style do the following 1 Install axle shaft bearing retaining plate and nuts Tighten nuts to proper torque Note Some axles use shims or adjuster nuts to set the axle shaft end play Refer to the vehicle service manual for the proper removal and installation procedures for the ...

Page 11: ...GRIP PRO INSTALLATION MANUAL 11 Figure 8 Figure 9 PLUG AXLE SPACER ...

Page 12: ...L NECESSARY SERVICING OR REPAIR The POWERTRAX parts warranty is voided if the part is used for competition or if it has been modified To make a warranty claim on parts used in non competitive applications distribu tors should contact POWERTRAX and individuals should contact their POWERTRAX dis tributor for a Return Goods Authorization RGA Number No returns will be accepted without an RGA Number Al...

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