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Old 11-28-2011, 05:59 PM   #1
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Default upro diff

I am working on my diff but it does not feel right. The diff is new but feels a little gritty. I also have a specr diff but i would think they should fell the same. Any suggestions.
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Old 11-28-2011, 07:25 PM   #2
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The upro will take a bit to 'wear' in...

Do a search on the photon thread, I'm sure I have seen some tips in there to get the diff action nicerer
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Old 11-28-2011, 07:34 PM   #3
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Lots of trial and error with the micro pro diffs. Build it as per instructions and put some toothpaste in it. Spin it with a low speed drill to break it in. Take it apart and clean everything. Build it again as per instructions and put in the oil of choice. Spin it to see how it feels. you can move shims from the inside of the diff to underneath the bearing. It may take a few builds to get it just right. If you plan on running both gear diffs, put the micro pro in the front with 80k and run the spec-r in the rear with 30wt shock oil.
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Old 11-29-2011, 07:39 PM   #4
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Default diff

Tried the toothpaste several times, the diff still feels bad.
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Old 11-29-2011, 07:55 PM   #5
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Quote:
Originally Posted by mdhyams View Post
Tried the toothpaste several times, the diff still feels bad.
You have to use the spearmint flavored. JK. I'll take a look at it Saturday if you're there. We'll get it working.
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Old 11-29-2011, 08:07 PM   #6
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Quote:
Originally Posted by mdhyams View Post
Tried the toothpaste several times, the diff still feels bad.
agree with stiltskin these diff need to shim properly for it to work. And it is better to shim both side of the out drive (both inside the diff and outside. As this will stop the outdrive pushing onto the inner gear. But not too tight. And sand the bottom of the gear slightly with very fine sand paper will help to free it up too. but only sand it slightly to get the back of the gear nice and smooth.
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