fast4popper Posted October 29, 2013 Report Share Posted October 29, 2013 So, after 70,000 miles lowered, my rear differentials front seal is seeping. What's it take to change this seal? And dare I ask, should I do a new set of gears? Locker? ... Thanks! Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 The last part of your question is probably already been answered in your head lol. The answer to the first part of your question is that it is not too bad. Gonna do my neighbors pretty soon. Just gotta drop the drive shaft out of the way, make sure you mark the pinion nuts position in relation to the flange, count your exposed threads, pop off pinion nut, use a screwdriver to crinkle the edge of the old seal so you can pry it out, fully seat your new seal, use a block of wood with a hole in it big enough for your pinion to fit in and seat the seal in by banging on the block of wood. Reconnect everything in line with your marks and make sure you tighten your nut down to the old thread count and maybe give it a little bit more of a rotation. Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Oh and top off your diff oil after Quote Link to comment Share on other sites More sharing options...
fast4popper Posted October 29, 2013 Author Report Share Posted October 29, 2013 So to swap the seal, no need to take differential apart? Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Nope. http://youtu.be/ZeTlelQFia4 Here is a good video, its an old k5, but same principle. You dont even open the rear diff when you do it. All the work is done on the driveshaft side of the diff. Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Crap, it didnt show up did it? Look up " how to install replace rear axle differential pinion seal 1aauto Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Youtube. Guy does it on a lift but depending on how low you are dropped, you should be able to do it on your back, or put it on jackstands. If you put it on jackstands, set your ebrake so the pinion doesnt spin on you when reinstalling the pinion nut Quote Link to comment Share on other sites More sharing options...
Link2603 Posted October 29, 2013 Report Share Posted October 29, 2013 I did it on my truck this last weekend. Easy job to do. Quote Link to comment Share on other sites More sharing options...
BLNAWAY Posted October 29, 2013 Report Share Posted October 29, 2013 Brentd hit it spot on not to terrible to replace Quote Link to comment Share on other sites More sharing options...
1BAD2K Posted October 29, 2013 Report Share Posted October 29, 2013 Done one before on another car, as sadi abouve, its a fairly easy job. Quote Link to comment Share on other sites More sharing options...
Brentd Posted October 29, 2013 Report Share Posted October 29, 2013 Like anything else you do to your baby, you will most likely sweat the details longer than the job itself takes. Should have seen me today when i was installing the vette servo. To me the transmission is this mythical unicorn that should never be touched for fear of catastrophic meltdown lol. Imagine my surprise when i finished, took it for a spin, and the only thing that happened was a big grin appeared on my face. Quote Link to comment Share on other sites More sharing options...
Mr.Scary Posted October 29, 2013 Report Share Posted October 29, 2013 Quote Link to comment Share on other sites More sharing options...
synyster_SS Posted October 29, 2013 Report Share Posted October 29, 2013 As others have said, fairly easy to do.. IMO easy to fack up too. The rotating torque of the pinion should be measured prior to removal of the pinion yoke, though. Rotating torque should be 3-5 in/lb tighter upon reinstallation. Make sure you clean the thread sealant off of the yoke splines and put new thread sealant on! Quote Link to comment Share on other sites More sharing options...
f1ss Posted October 29, 2013 Report Share Posted October 29, 2013 (edited) Off topic, I apologize. Fast4popper, I am about to due a rear diff service. May I ask which cover you have? I am completely stock and was thinking to change to T/A. I have a Dorman for short term use but am now questioning it. Just curious what cover you have? Obviously the drop makes our trucks have different drivetrain characteristics/results and I am curious what cover you have on the rear. I have a few other questions, but with the rear diff cover and if it is a T/A will answer the other questions. I was thinking a static drop next spring w/leaf springs which now has me thinking only stay stock height... I am sorry to ask an off topic question sir. Just looking for some help from a longtime member. -Andrew Edited October 29, 2013 by 03mass (see edit history) Quote Link to comment Share on other sites More sharing options...
fast4popper Posted October 29, 2013 Author Report Share Posted October 29, 2013 I run the gm performance cover. It is nothing more than a bigger fluid volume cover. I believe it doubles the fluid volume. As for Drop, I'm running the 4" bell tech leaf pack drop. Hope this helps. Quote Link to comment Share on other sites More sharing options...
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