Gear Pattern Check - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 9 Old 05-14-2017, 06:26 PM Thread Starter
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Gear Pattern Check

Hey Guys, It's the Sunday Night Regear project!!

Anyway, first time setting my own and I wanted to ask JKO.... what do you all think. I think that after staring at too many patterns, this one looks the closest to everything that I've read.

The details, New Dynatrac Pro44 housing (that's a story for another post, lets just say this wasn't exactly an optional upgrade). Full master kit Yukon 4.56 ratio.

Thanks to Northridge for all the toys they were awesome.

backlash is 0.005-0.006

Here are the patterns.

Thanks for looking!!!!
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08' Rubi 4-door. Baby Hauler, even in 2ft of snow...
3.5" Rock Krawler, and 35's.

94' XJ 4.5" RE OX front and Rear, 33's
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post #2 of 9 Old 05-14-2017, 07:54 PM
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Is that a front or rear housing? Either way the pattern on the convex side needs to move away from the toe. Adjust your pinion shim in whatever direction will move it that way. You should at this point have seen a trend as to what happens when you move the shim so adjust it about .005" in that direction and try again. This should move your pattern as well on the concave side from the heel and the idea is to have them meet in the middle.

Last edited by Dkjeep; 05-14-2017 at 07:57 PM.
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post #3 of 9 Old 05-14-2017, 08:03 PM Thread Starter
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It's a front housing.

Also, I thought that moving the pattern on the face was the carrier shims. Depth was the Pinion shims.

Thanks for looking!

08' Rubi 4-door. Baby Hauler, even in 2ft of snow...
3.5" Rock Krawler, and 35's.

94' XJ 4.5" RE OX front and Rear, 33's
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post #4 of 9 Old 05-14-2017, 08:07 PM
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Truth is one affects the other and when one is adjusted the other must be as well. Adjust the pinion shim and then the carrier shims to regain proper backlash and report back.
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Last edited by Dkjeep; 05-14-2017 at 08:19 PM.
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post #5 of 9 Old 05-14-2017, 08:19 PM Thread Starter
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Copy that, Thanks for the help!

08' Rubi 4-door. Baby Hauler, even in 2ft of snow...
3.5" Rock Krawler, and 35's.

94' XJ 4.5" RE OX front and Rear, 33's
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post #6 of 9 Old 05-15-2017, 10:31 AM
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Backlash is too tight. JK44 sped (per the Yukon book) is .006-.010

I understand that's right on the edge, but since your getting variation under spec I wouldn't run it (just me).

You should measure in that range all around the gear, with no more than .002 variation. Remove .005 off your ring-gear-side shim and move it to the non-ring-gear-side.

Don't bother running the pattern until the backlash is as close to nominal as you can get.

As far as the pattern, I agree with DKjeep that you want the patterns to converge, but given it looks pretty well centered top to bottom moving the pinion depth might not help you out. I've found some gears don't converge, just the way they are machined. focus more on getting the patter depth correct. That said loosening up your backlash might help.
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-Mike
2007 2dr X, 6sp, 35's on D44's, 2" lift, cage, hydro, etc.
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post #7 of 9 Old 05-15-2017, 01:39 PM Thread Starter
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I ended up getting the backlash to 0.008 to 0.009 depending on where i checked it on the ring. I tried 5 more combos of pinion depth, it didn't bring the pattern to the center. I think that I'm going to go with what i have and see how it goes.

Thanks for the input on this deal.

08' Rubi 4-door. Baby Hauler, even in 2ft of snow...
3.5" Rock Krawler, and 35's.

94' XJ 4.5" RE OX front and Rear, 33's
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post #8 of 9 Old 05-16-2017, 01:52 PM
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5 more tries didn't move it? What increments did you adjust by? What was the max you strayed from where it was?

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post #9 of 9 Old 05-17-2017, 11:38 AM Thread Starter
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It moved the pattern, but not in a way that looked correct.

I also decided to check the pinion depth and found that it was +0.014 from the ideal housing dimension.

I'll dig up a couple more pics of the current setup.

08' Rubi 4-door. Baby Hauler, even in 2ft of snow...
3.5" Rock Krawler, and 35's.

94' XJ 4.5" RE OX front and Rear, 33's
XJhammer is offline  
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