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-   -   Rear-End Rebuild, Hows My Contact Pattern Look? (http://www.ramforumz.com/showthread.php?t=48585)

Dizzydan02 02-22-2010 11:53 PM

Rear-End Rebuild, Hows My Contact Pattern Look?
 
Im rebuilding the rear-end in my '99 Dodge 4x4. Its a 9.25 trac-lok. Gears, bearings, and races are brand new.
I think I set-up the backlash and carrier bearing pre-load correctly I would just like a second opinion.
Here are a couple pictures of the contact pattern. Hopefully you guys can see it fine, I didnt use a whole lot of gear marking compound.
The last thing I want to do is take the pinion back out, I dont have any way to pull the pinion bearing back off if I need to install or remove a shim. So hopefully this is good enough.

http://i99.photobucket.com/albums/l3...2/100_0322.jpg

http://i99.photobucket.com/albums/l3...2/100_0324.jpg

CdnoilRAM 02-23-2010 12:25 AM

It looks good to me from my limited engineering background, but I'd let some of the techy guys pipe in to get a 100%

2000 Ram 2500 02-23-2010 12:39 AM

It looks good. Pinion depth is good. How much backlash do you have?

RamTech 02-23-2010 12:50 AM

Looks pretty good to me. I'd paint all the teeth and check the contact pattern the whole way around just to be safe.

Dizzydan02 02-23-2010 12:52 AM

Thanks for the replies.
This was my first axle rebuild and i had to do it out in the driveway in the cold of winter.
I was hoping the contact pattern was ok, i'd rather shoot myself than tear it all back down especially when i have no way of taking the pinion bearing back off...but then again i dont want to ruin brand new gears.
After final assembly the backlash was sitting at .007

2000 Ram 2500 02-23-2010 01:19 AM

Quote:

Originally Posted by Dizzydan02 (Post 161919)
Thanks for the replies.
This was my first axle rebuild and i had to do it out in the driveway in the cold of winter.
I was hoping the contact pattern was ok, i'd rather shoot myself than tear it all back down especially when i have no way of taking the pinion bearing back off...but then again i dont want to ruin brand new gears.
After final assembly the backlash was sitting at .007

You do not need to paint the gears all the way around like mentioned above. It looks good. If your depth patern looks that good and you have .007 back lash. You need to put the cover on it and fill it up with a nice synthetic fluid. Wont get much better than that. Yes it does suck when you have to pull the pinion bearing back off to change the pinion depth shim. You are good with what you got and you should pat yourself on the back....Do your self a favor and replace the speed sensor in the housing while you are back there. They are not much at all....and its only one bolt.....

Dizzydan02 02-25-2010 02:58 AM

Thanks for all the help guys I guess I will put the axles in and the cover on and fill er up. Do you know if I will still need to use posi additive with synthetic fluid?

dirtsurferus 02-25-2010 11:02 AM

my advice..get royal purple gear oil. it comes with the limited slip additive and the stuff is just amazing in general...expensive as hell..but worth it in my opinion. and i agree with replacing the speed sensor. it's only like 15 bucks and will take no longer than 5 or tenminutes tops with your mechanical abilities. just make sure that you treat the gasket of the sensor like that of a fuel injector or else it will not go in ( put some gear oil on it..you know what i'm talking about) out of curiosity...how long did it take you and what special tools are required? ( i've been toying around with the idea of doing this myself but i'm just broke right now lol )

Dizzydan02 03-03-2010 04:47 PM

I got everything put back together and filled with lube. I installed a new speed sensor and I also installed a new rear u-joint and test drove it today.

First thing I noticed right off the bat was that my speedo didnt work, it didnt work before I installed the new speed sensor either....anyone know what it could be?
I didnt have any vibrations or clunks or anything like that when driving it. I did notice a faint noise when driving 35mph+ it got a little louder the faster I went. It was a noise that sounded like a truck with big tires going down the highway. I am going to included some pictures of the truck with the tires I have on it, you guys think these tires would make noise like that?
And of course now that I have the rear-end done the radiators leaking :mad:

http://i99.photobucket.com/albums/l3...2/IMAG0002.jpg

http://i99.photobucket.com/albums/l3...2/IMAG0004.jpg


Heres a little info for you dirtsurferus on what I used to rebuild the rear-end.

It took me most of the winter but thats because I didnt have all of the tools before I started.
I bought a new Yukon Ring and Pinion, a master rebuild kit which includes all the bearings and races and went to o'reillys and got axle bearings and seals. I also bought a Mopar Performance crush sleeve which are not the ones to get.
The oem style crush sleeves take 300+ ft. lbs to crush. So after fooling around with that for a few days I was worn out trying to crush it and used the one that came with the master rebuild kit, it was made by ratech and only required around 120 ft. lbs to crush. Wish I woulda known that sooner.
I also bought a pinion bearing installer tool, it basically fits over the pinion and you can hammer the bearing on with it. If I were to do it over again I would definetly buy a pinion bearing remover just in case I would need to change shims.
I had to buy a tool that fit in the axle tubes to turn the adjuster bearings, a big punch to tap out the axle bearing races, an axle seal and race installer, a tool to hold the yoke when tightening the pinion nut, and of course a backlash measurement device.
Theres quite a bit required to do this job. Definetly buy all the tools before you tear it down.

CdnoilRAM 03-03-2010 06:30 PM

Those tires don't have big enough lugs to cause any major road noise, but noy being there to hear it, I couldn't tell ya for sure. You could have a friend drive it by you and try to hear if it's a mechanical noise or a rubbery drone. She does look good though.

Hey dizzy, maybe fill out your UserCP so we can see year/model/engine ya go there in the future.


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