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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 12, 2013, 5:10 AM
Post #126 of 143
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Re: 2003 Sierra differential
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The patterns look good to me.  Your becoming the jack of all trades.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Apr 14, 2013, 1:03 PM)
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MarineGrunt
Enthusiast
Apr 12, 2013, 6:01 AM
Post #127 of 143
(1386 views)
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Re: 2003 Sierra differential
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Ha...maybe a jackoff of all trades!
I wouldn't have attempted half the stuff I've done if I knew I didn't have you guys to help me figure out my screw-ups! I'm just glad pinion depth stayed the same after I used the new bearing especially considering it was a different bearing number. I measured the thickness the best I could and was pretty certain it was the same. I had to measure it with the race on because the bearings and races were different sizes. With them together they ended up measuring the same though. That was the one thing I was worried about. I know I would've eventually go it right but it would've been a long painful process. Especially since I would've had to crawl under the truck even more.
Thanks DS.
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MarineGrunt
Enthusiast
Apr 13, 2013, 8:16 AM
Post #128 of 143
(1370 views)
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Re: 2003 Sierra differential
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Putting oil in now. I know it calls for around 2 quarts. You do keep adding until it starts dripping out the fill hole, right? I've put almost 3 quarts in and it hasn't starting dripping out. Is that just because I didn't have any old oil in the axle tubes? I'm sure I am suppose to keep adding until it runs out. Since I've already put almost 3 in little crap like this always makes me nervous and that's why I ask the pros.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 13, 2013, 8:27 AM
Post #129 of 143
(1368 views)
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Re: 2003 Sierra differential
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Enough so you can touch it with one joint. Putting too much may cause the seal to leak or come out the vent.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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MarineGrunt
Enthusiast
Apr 13, 2013, 8:31 AM
Post #130 of 143
(1364 views)
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Re: 2003 Sierra differential
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Sounds good HT......Thank you
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 13, 2013, 11:08 AM
Post #131 of 143
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Re: 2003 Sierra differential
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Gear Case oil level: Said already I haven't been where you have on this. The basics are for the fill hole in whatever like that is when it can run out of filler hole is right. In this case I'd check again after a run and it will/should be fine.
Dang stuff isn't being pumped around it just sits there and splashes around. Near life long have bent a Q-Tip in many and if close leave it alone short of noting a leak anywhere. If you could and you could overfill one it would be a problem,
T
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MarineGrunt
Enthusiast
Apr 13, 2013, 1:56 PM
Post #132 of 143
(1350 views)
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Re: 2003 Sierra differential
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Well, another successful repair thanks to you guys. She's race ready again. I can definitely tell a difference with the Truetrac. Have to be easy on the gas around corners or else it will chirp the tires. I wish I had some snow to play in.
Once again, thanks for all of the help and advice!
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 13, 2013, 2:20 PM
Post #133 of 143
(1349 views)
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Re: 2003 Sierra differential
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Trust me friend you are remarkable. Many full blown shops send this crap out around where I am anyway. Time and space plus the tools limit even dealerships. Thread is so long now I'm sorry for any repeats. Stuff like this didn't get fixed up but whole units replaced on off warranty vehicles. One day and you have your vehicle back again hopefully the yard dogs know which ones are good - they do around me.
Speak for myself but bet many. This was a virus to be so finely involved in specialty area even in the trade. More power too you. Glad this site and it's regulars had tons more info than I could muster for this.
Great going MG and all the guys involved.
It's now a five star thread and now would take a lot of ink to print it all out.
Congrats again buddy,
Tom
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MarineGrunt
Enthusiast
Apr 14, 2013, 11:01 AM
Post #134 of 143
(1339 views)
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Re: 2003 Sierra differential
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Thanks Tom. You know I probably wouldn't have even attempted it without the help I get here. I just wish I would've came across Carjunky a long time ago. I always got my vehicles up and running but repairs would've went much smoother.
I had my "service airbag light" come on yesterday. Come to find out one of my kids left the rear push out window cracked and some rain got the carpet wet under the driver's seat. There's a module down there that gets wet and can cause the light to come on. Guess it's somewhat of a common problem if the floorboards get wet. I'm drying out the carpet now. I pulled the front seats and lifted up the carpet. I'm also going to clean the connector and put some grease in it. It's always something. Oh well, the truck is getting a good cleaning now.
Anyone know how long I should go before changing the gear oil after a rebuild? I was thinking about changing it at 500-1000 miles. I felt I did a good job keeping my work area and parts clean but I'm sure you can't keep all of the bad stuff out such metal dust. Good idea or is it a waste of money?
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 14, 2013, 1:07 PM
Post #135 of 143
(1332 views)
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Re: 2003 Sierra differential
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Good job! Tom's right, most shops would sub that out because it takes too much time and most don't have the tools for pinion checking.
You could make some money at the race tracks. Someone looking to change gears in their rear ends. A non-integral rear end should be cake walk for you.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 14, 2013, 1:12 PM
Post #136 of 143
(1331 views)
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Re: 2003 Sierra differential
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Changing out the gear oil? IDK - couldn't hurt but don't think it's generally called for. For that matter I'm still a bit shocked it needed anything to begin with unless it suffered some very hard use which I think you said it did. After all the work of doing it I guess I probably would and perhaps thin it and run it thru a coffee filter to see what you get. All that even if it prooves perfect just if you missed some debris somewhere? That or put a real strong magnet on outside of the cover as low as possible maybe now and see what it looks like.
Still not into reuing oils no matter what antics you go thru, - Tom
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MarineGrunt
Enthusiast
Apr 14, 2013, 7:47 PM
Post #137 of 143
(1322 views)
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Re: 2003 Sierra differential
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Thanks DS....Hey, this thing works for now but who knows how it will be working after I put a few hundred miles on it! If I'd worked at the track I'd end up having all kinds of drivers after me. I'm sure everything's fine but I never get my hopes up.
Do you HAVE to have the special tool to measure pinion depth or do you just use it for a starting point for the pinion shims? I read that it really just saves time, but in the end, you go by the gear pattern. If that's true you don't have to have it but it would save you hours and hours of work. I do realize you have to have a dial indicator to check backlash properly. When I was researching I read some guys would use feeler gauges but I don't think I'd trust that.
Tom, I think I will change the oil at 500-1000 miles. Probably doesn't need it but figure it won't hurt. It does have a magnet already, but if I pull the cover to check it, there's no way I'd reuse the oil. Never have, never will.
I finished it up just in time. I go back to work tomorrow morning. At least it happened when I had 10 days off between jobs.
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nickwarner
Veteran
/ Moderator
Apr 14, 2013, 8:47 PM
Post #138 of 143
(1320 views)
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Re: 2003 Sierra differential
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Put in some overtime. You owe all of us a few beers now.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 15, 2013, 1:43 AM
Post #139 of 143
(1319 views)
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Re: 2003 Sierra differential
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Nick - I'm sure you can find some unbroken ones in this mess. MG didn't work on that truck!
Tom
(This post was edited by Tom Greenleaf on Apr 15, 2013, 1:43 AM)
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MarineGrunt
Enthusiast
Apr 15, 2013, 3:59 AM
Post #140 of 143
(1311 views)
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Re: 2003 Sierra differential
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I owe you guys more than a few. I think Nick might've caused that wreck during his last high speed police chase! 
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nickwarner
Veteran
/ Moderator
Apr 15, 2013, 2:09 PM
Post #141 of 143
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Re: 2003 Sierra differential
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I was the only one who wrecked on my last one. Well you do a couple more projects like you've been doing you may as well open up your own shop. Tell you what, I'll truck my tools out to you and you get wrenching. I'll take your truck with the new diff out on the road and go weld for you. Then we both get a break from work.
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MarineGrunt
Enthusiast
Apr 15, 2013, 8:16 PM
Post #142 of 143
(1296 views)
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Re: 2003 Sierra differential
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You were probably the only one who wrecked because you fell for their trap. "Hey, the heck with the nail strips, he'll keep driving on the rims. Let's throw beer bottles all over the road and make it look like they're there for the taking. Warner will be flying down that road at 100+, see the beer in his rearview after he scoots by, slam on the brakes, and end up in the ditch"!
We could make some big bucks with a mobile welding service around here. There are a couple dirt tracks within an hour of here. Not to mention, the farmers would keep us busy almost all year. I know welding is work for me but I could keep that hood flipped down all day and be happy. It kind of relaxes me. It would be nice to weld half the time and turn a wrench the other half though. Best of both worlds.
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nickwarner
Veteran
/ Moderator
Apr 15, 2013, 9:10 PM
Post #143 of 143
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Re: 2003 Sierra differential
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My last rollover was 90mph locked in on radar by the nearest squad in the pursuit. They didn't need nail strips, I couldn't see much. Glasses got knocked off me and I am so blind I couldn't even clearly see my speedo.
I also enjoy the days its just a weld/fab project. Lot easier than trying to diagnose a driveability issue. I just throw in earplugs, bust out the grinder and the rest of the time drop them hood. Not a bad way to spend the day. Not much welding in fixing cars aside from exhaust but lots in trucks and equipment. Had a Toyota forklift in a neighboring bay with broken bolts that retain the mast. He got it off the lift but bolts weren't coming out and broken below flush. Ended up drilling through the whole works with a 5/8 bit and filling it in with weld. It was easier to start over and machine it myself at that point instead of deal with the bolt that liked where it was.
I'll weld half the time and tell you what to do the rest of it. Then I can be happy all day long.
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