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Old 10-20-2014, 05:19 PM   #8611
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First time building a 10th and ball diff for that matter, just installed the rear and notice that the t nut is preventing the left arm from moving up. I compressed the spring a bit before building and ball diff feels smooth.
Do I need to just tighten the t nut more to get the movement and make the ball diff tighter?

Your diff doesnt look tight enough
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Old 10-20-2014, 05:25 PM   #8612
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the t-nut could be in the wrong diff half also. it only properly fits in the correct diff half
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Old 10-20-2014, 05:37 PM   #8613
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It's in the wrong half
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Old 10-20-2014, 05:37 PM   #8614
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I'll tighten the t nut up a little and see what it looks like. The manual says locked and back out 1/8th but I followed the vids from page 1 and it ended like the picture.
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Old 10-20-2014, 05:43 PM   #8615
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The white tab should be pretty much bottomed out in the channel. If it doesn't something is probably wrong so it's probably installed in the diff backwards, then the diff was installed backwards
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Old 10-20-2014, 05:47 PM   #8616
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It will tighten up all the way into the channel but the diff felt too tight so I backed it out.

Diff was installed with the head of the trust bolt on the passenger side
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Old 10-20-2014, 05:50 PM   #8617
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It may feel a little tight until you break it in or turn it by hand with tires on the wheels.
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Old 10-20-2014, 06:03 PM   #8618
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If you only compressed the spring "a bit" it was probably not enough. You want to do it all the way till the coils touch each other, spin it 180 and do it again.
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Old 10-20-2014, 06:26 PM   #8619
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Also, try going up in spring rates in the rear and/or softer in the front.
Are you finding any other oil wt helpful?

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Old 10-20-2014, 07:10 PM   #8620
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I am running 1.6 f/r with 32.5/30 oils
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Old 10-20-2014, 08:36 PM   #8621
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I am running 1.6 f/r with 32.5/30 oils
same here
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Old 10-20-2014, 08:37 PM   #8622
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I am running 1.6 f/r with 32.5/30 oils
Thats pretty soft wildcat. What springs are you running?
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Old 10-20-2014, 08:53 PM   #8623
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right now I am running white fronts and white rear. the track is not exactly smooth. when it is smoother I will go 35/32.5 with the 1.6's
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Old 10-20-2014, 10:30 PM   #8624
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Thats pretty soft wildcat. What springs are you running?
That's not soft, with 1.6s a lot of people are running 30/27.5 with great success.
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Old 10-20-2014, 11:10 PM   #8625
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It will tighten up all the way into the channel but the diff felt too tight so I backed it out.

Diff was installed with the head of the trust bolt on the passenger side
It's installed in the correct orientation. The t-nut should be pretty much bottomed out. Here's how I check for a proper diff setting. Others may have a different approach.

1. Compress spring with pliers, then assembly diff
2. tighten diff screw until nut pretty much bottoms out. I assembly the diff on the bench, but set it in the car.
3. install in car.
4. put tires on
5. take a tire in each hand and rotate them in opposite directions in a quick motion and let go simultaneously with both hands. I aim for about a 1/2 diff rotation after I let go.
6. adjust screw until you achieve this. Unscrewing the passenger inner camber link ball stud and keeping it on by just a few threads until the diff is set allows for a convenient way to access the diff screw.
7. set the rings by holding a tire and running the motor at about 10% throttle for 30sec. Then hold the other tire and repeat.
8. Diff will loosen up a bit, so tighten until about a 1/2 rotation spinning by hand is achieved
9. run on track a few minutes, check and tighten as needed.
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