How to- Replace rear pinion seal
How to- Replace rear pinion seal
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Jiye Yuan (05-21-2021)
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ibd2328 (05-18-2013)
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07-29-2013, 01:03 AM
#10
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Join Date: Jul 2013
Location: Cnr Walk & Don't Walk, CA
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there is a little more that should be done
I would suggest the following.........
When removing the pinion nut , DO NOT use an impact wrench. you stand a chance of damaging the pinion bearings. Use a 3/4" drive socket and braker bar or a 1/2" with a cheater bar. Same with replacing the pinion nut...in fact you should use a NEW pinion nut or at the very least use blue Loctite on the pinion threads on assembly.
As to preload on replacing the pinion nut. When removing the pinion nut, mark or center punch the face of the nut and the face of the pinion shaft. You have to count the nut revolutions when removing and use the same revos. on replacing, and tightening the nut by looking at the dots and aligning those dots. You can use a Sharpie pen instead of center punching, but it will very hard to see. You will be using the same crush sleeve that is still in the gear housing and you must put that nut back in the same place that was originally.
When installing the seal, before pressing in, clean the bore very clean, no grease or oil. Grease the seal lip of the seal. Use an anerobic sealer on the o.d. of the seal.
Before replacing the companion flange (the front flange) , inspect the sealing area of the flange. ANY rust, dings, scratches, use a ribbon of 500 or 600 wet/dry paper removing any crud and lightly grease the seal area.
Before you remove the jackstands under the axle assembly (you did use jackstands...yes??) and before screwing together the driveshaft, rotate the pinion flange to make sure things feel right.
When removing the pinion nut , DO NOT use an impact wrench. you stand a chance of damaging the pinion bearings. Use a 3/4" drive socket and braker bar or a 1/2" with a cheater bar. Same with replacing the pinion nut...in fact you should use a NEW pinion nut or at the very least use blue Loctite on the pinion threads on assembly.
As to preload on replacing the pinion nut. When removing the pinion nut, mark or center punch the face of the nut and the face of the pinion shaft. You have to count the nut revolutions when removing and use the same revos. on replacing, and tightening the nut by looking at the dots and aligning those dots. You can use a Sharpie pen instead of center punching, but it will very hard to see. You will be using the same crush sleeve that is still in the gear housing and you must put that nut back in the same place that was originally.
When installing the seal, before pressing in, clean the bore very clean, no grease or oil. Grease the seal lip of the seal. Use an anerobic sealer on the o.d. of the seal.
Before replacing the companion flange (the front flange) , inspect the sealing area of the flange. ANY rust, dings, scratches, use a ribbon of 500 or 600 wet/dry paper removing any crud and lightly grease the seal area.
Before you remove the jackstands under the axle assembly (you did use jackstands...yes??) and before screwing together the driveshaft, rotate the pinion flange to make sure things feel right.
