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11-06-2011, 12:55 AM #1
Differential Gear Swap Pattern Check
Just curious to see if anyone knows if this is an acceptable pattern.
Let me know.
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11-06-2011, 08:05 AM #2
Looks like the pinion isn't quite deep enough. What's your backlash spec? .015" sounds like a lot.When you hear hoofbeats, look for horses not zebras.
11-06-2011, 12:17 PM #3
This is my base set up. I'm going from here, i will try to reduce the shim on the main bearing. Once i get pinion depth i'll go after backlash, i do not know what the spec is suppose to be on the gears, i cannot find it anywhere in the book they supplied. My gears are USA Gear, in a green box.
11-06-2011, 02:50 PM #4
I was thinking .007/.009 and I agree on the pinion depth.
11-06-2011, 07:55 PM #5
You need MORE shim under the inner pinion bearing. That will push it towards the center of the ring gear.
11-06-2011, 07:59 PM #6
Here's what i got now, 0.007 backlash.
And the pattern seems more rounded and centered. I can say I'm happy with this pattern. Does seem like the pinions too far out on the drive side though.... Coast side is perfect.
11-06-2011, 11:46 PM #7
I got ambitious and changed the pinion depth...
Let me know what you think, tomorrow i'm sealing it all up.
11-07-2011, 08:02 PM #8
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Very interesting post here, I learned something new today! My dad is very old school as he used to take a piece of newspaper and roll it through the gears, he would make his adjustments based on how the paper came out....
11-08-2011, 06:25 AM #9
Looks good to me. Just curious, did you use a setup bearing for the inner pinion?
11-08-2011, 04:27 PM #10
I re-did it again and got basically the same pattern with 0.005"-0.006" backlash, so i'm going to stick with that.
I took a brand new bearing and bored out the inside so that it could slip on and off. The bearings from my rebuild kit from stock differ in size and angle. So i couldnt use the stock bearing for set up. Had to buy a whole new bearing. Well worth the $30.
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