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Old September 19th, 2011, 08:38 PM   #1
jr03
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Default Pattern Check Help D44 Rubicon

It was suggested I try posting here for some gear pattern help, this is a 2003 TJ Rubicon D44 regearing to Superior 4.88
This is .008 BL(close may need tweaked) .055 Pinion .138RGS .138NRGS
18 inlb Pinion preload Comments, suggestions? Thanks, Bill
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Old September 19th, 2011, 09:41 PM   #2
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run it. good job and welcome.
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Old September 19th, 2011, 10:25 PM   #3
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Thanks, I thought it was pretty close, well lot better than my other trys and better than the factory pattern I think, but this is my first regear. If its good, I'll button it up and move on to the rear axle.
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Old September 21st, 2011, 03:30 PM   #4
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Good to go!
Nice job.
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Old September 21st, 2011, 03:33 PM   #5
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Run it
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tube bending and gear installs pm me for info! gears installed for $150 and up per axle.
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Old September 21st, 2011, 05:44 PM   #6
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Thanks for the feedback, I've been paranoid about it...is it good? Should it be deeper? Can't fine tune it less than .005 increment with shim kit, do I need to pick up more ect ect. I appreciate the feedback, from experienced eyes.
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Old September 21st, 2011, 05:55 PM   #7
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i mentioned you should check here. i knew they could help ya.
tab and ironman offroad both know thier stuff!
they break stuff i could never afford regularly lol.

good job on the re-gear! enjoy
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Old September 21st, 2011, 06:03 PM   #8
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Quote:
Originally Posted by jr03 View Post
Thanks for the feedback, I've been paranoid about it...is it good? Should it be deeper? Can't fine tune it less than .005 increment with shim kit, do I need to pick up more ect ect. I appreciate the feedback, from experienced eyes.
You have the pattern right where it should be. Pretty much centered top to bottom and toe to heal. Any changes you make probably wouldn't help or improve much. Some cases require putting the pattern in a different spot like a drag car may run it much closer to the heal on the stroner part of the gear or some may want it quieter so they run it more towards the toe. Either way your pattern looks perfect. Sometimes they go together great, sometimes not so much....
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Old September 21st, 2011, 06:43 PM   #9
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Looks like a nice match. Did you use a case spreader? You're right at the high limit for backlash for my liking. I believe .003-.009 is spec for most 44's I lean towards .005-.006. The other thing you should do is make sure you measure the backlash at 3 somewhat equal places around the ring gear. Not just one like a majority of the people do.
The last thing I would do is once you get it put back in a buttoned up, measure the pinion/drive flange rotation angle. NO you don't need any special equipment. Just attach a piece of cardboard to the flange. Rotate the pinion up against one side of the ring gear and scribe a line. Then rotate it back again the opposide of the gear. But not turning the ring gear. You are effectively measuring the backlash but from the drive side. There shouldn't be more than a few degrees at most.
After you've run it for a hundred miles or so, check it again. Compare the results. Sometimes, event the EXPERTS mis-set the backlash. The usually happens when you don't have a case spreader but not always. If the results are more than three or four times the original setting, PULL IT BACK APART and re-set the backlash. If you don't you risk running the pinion out on the weak part of the tooth and chipping or breaking it, not to mention the increase in noise
Be sure to use blue loc-tite on the carrier bolts too.
jim-kb8ymf

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Old September 21st, 2011, 09:03 PM   #10
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Yes I do have a case spreader, I checked BL and preload before taking it apart tonight to remove the setup race and install the normal pinion race. The BL was closer to .009 the pinion preload was a little less too but still good for setup. I'm going to try bringing the backlash down , factory BL setting was .007 and from what I read some try for .008 on the D44. The pinion race is pretty snug so its going to take a bit to get it in, I'll probable not get much more done tonight. Hopefully the pattern will stay good when its back together, and I'll get the BL dialed in a little lower too...at least thats the plan. I think I saw Dana had .005-.008 for BL and Yukon says .006-.010, anyway I'll work on it once I get the pinion together and preloaded.

Thanks for all the input, and tips. I do appreciate the help everybody!
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Old September 21st, 2011, 09:23 PM   #11
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Nice job on the set up.

I've never used a case spreader, actually, I don't believe in them. And maybe I'm wrong. But I've used a set of "set up bearings," newer bearings opened up to slide on and off easily for set up purposes. Once I get what I want(setting up the carrier using the set up bearings very very tight in the housing/case), I'll add .005 to each side to preload the bearings (this is for the carrier only, of course). I've never had a problem with anything I've set up. I've read a few times (on-line) where a case spreader caused more problems then what it was worth.
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Old September 21st, 2011, 10:46 PM   #12
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I know a case spreader can cause problems if spread to far, and I never went over .010 spreading. Also this is a D44 Rubicon and the shims are outside the bearings(no setup bearing just setup race for pinion) so there is nothing to hold them in place so at least for me it was easier(the carrier shims are at .140RGS and .135NRGS) and I still have to give it a few wacks with the dead blow to seat the carrier bearings.

Anyway got the pinion setup other than the seal and new nut, tried twice for BL and ended up at .007 measured at 4 places and pinion preload is about 18inlb (nut at 200ftlb) this was a quick pattern check after setting the BL.
I guess I did something wrong when I first started because I started here and got bad patterns....These are the exact factory shims all around and factory BL too.

Thanks to joe_jeep for pointing me to this forum, I'm picking up a lot from everyone.
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