Posted: 11/25/2014 8:05:56 PM EDT
| I'm gonna take a shot at this, prob wrong but someone please correct me if it is. You need to know all this information in order to correctly set the pinion preload when you reassemble. The pinion nut is responsible for the correct pinion preload. It sounds like the steps mentioned in that pic are all "other" things you can do in order to ensure the correct pinion preload during reassembly. |
|
Quoted:
Wondering if anyone has changed out the front diff "pinion seal assembly" on an H3? I've changed out a rear pinion seal before and it was pretty straight forward but GM is throwing some confusing shit into the mix on the H3. <a href="http://s428.photobucket.com/user/stvnkrchnr/media/Mobile%20Uploads/image.jpg.html" target="_blank">http://i428.photobucket.com/albums/qq9/stvnkrchnr/Mobile%20Uploads/image.jpg</a> Specifically the steps above. Why would you have to check the torque before if you mark the the pinion and bolt and measure the threads exposed before you remove the nut? So if anyone has experence please shed some light. Thanks! Because the pre-load of bearings changes as they wear. Most setup charts will have a New preload spec and a used preload spec. Textbook answer is measuring it allows you to return it to the state it was before you took it apart and to continue wearing in the same fashion. Reality is it probably doesn't really matter that much as long as pre-load is in the ball park for used bearings. |
|
To change the front differential pinion seal:
Remove the driveshaft and note how many threads on the center shaft extend beyond the nut. A photo would help here, if you want. Using a sharp chisel, make 3 marks in a straight line on the center shaft, the nut, and the yoke. These marks and the number of exposed threads will let you put the nut back exactly where it was. Now remove the nut, remove the yoke (might need a puller) and change the seal. Put the yoke on with those 2 marks lined up, then tighten the nut gradually until the mark on the nut lines up with the marks on the shaft and the yoke with the correct number of threads exposed. Install driveshaft. Change or fill the gear lube. |
|
Quoted:
To change the front differential pinion seal: Remove the driveshaft and note how many threads on the center shaft extend beyond the nut. A photo would help here, if you want. Using a sharp chisel, make 3 marks in a straight line on the center shaft, the nut, and the yoke. These marks and the number of exposed threads will let you put the nut back exactly where it was. Now remove the nut, remove the yoke (might need a puller) and change the seal. Put the yoke on with those 2 marks lined up, then tighten the nut gradually until the mark on the nut lines up with the marks on the shaft and the yoke with the correct number of threads exposed. Install driveshaft. Change or fill the gear lube. Cool, that was my plan and how I will execute. Has anyone ever heard that a pinion seal can leak due to the diff being over filled? Not that mine was but when my neighbor told me that it didn't make any sense to me. Thanks for the replies fellas! Kirch |
|
Quoted:
Cool, that was my plan and how I will execute. Has anyone ever heard that a pinion seal can leak due to the diff being over filled? Not that mine was but when my neighbor told me that it didn't make any sense to me. Thanks for the replies fellas! Kirch Quoted:
Quoted:
To change the front differential pinion seal: Remove the driveshaft and note how many threads on the center shaft extend beyond the nut. A photo would help here, if you want. Using a sharp chisel, make 3 marks in a straight line on the center shaft, the nut, and the yoke. These marks and the number of exposed threads will let you put the nut back exactly where it was. Now remove the nut, remove the yoke (might need a puller) and change the seal. Put the yoke on with those 2 marks lined up, then tighten the nut gradually until the mark on the nut lines up with the marks on the shaft and the yoke with the correct number of threads exposed. Install driveshaft. Change or fill the gear lube. Cool, that was my plan and how I will execute. Has anyone ever heard that a pinion seal can leak due to the diff being over filled? Not that mine was but when my neighbor told me that it didn't make any sense to me. Thanks for the replies fellas! Kirch Make sure the vent/line is clear and working properly. A plugged vent can cause leakage. Never overfill the diff housing. |