Gear help!!
Gear help!! Just setup 4.10 gears in my 10 bolt, yeah I know, bad idea in the first place, but budgets decide mods here. Anyway, set pinion up with 30 in lb rotating torque, and .008" back lash. Used approximately .003" preload per side on the carrier. These gears are a motive set. Total rotating torque with carrier (no axles) is 39 in. lb. Seems these specs should be dead nuts, but I have a slight howl on moderate load.....what gives! Thing should be pretty quiet. By the way, I did check the contact pattern, was a little high on the teeth, but the backlash was right on so I left it. I guess I will bring the carrier closer to the pinion this winter. Any suggestions from experienced gear guys???
Did you get the performance gears? blue box or orange? If your set came in the orange box, it should make a little noise.
If you feel comfortable with your built id say the whine is fine.
When you say "high on the teeth" do you mean the face and flank or heel and toe?
As long as there was untouched space between your pattern and face i would say your good.
But post more info like too close to the heel and face or sum like that.
If you feel comfortable with your built id say the whine is fine.
When you say "high on the teeth" do you mean the face and flank or heel and toe?
As long as there was untouched space between your pattern and face i would say your good.
But post more info like too close to the heel and face or sum like that.
When I say high on the teeth, I am not referring to heel or toe, in that regard it is centered. What I mean is if the ring gear was laying flat on the bench, it was be toward the top of the tooth. I have the orange box from motive, I took it out on the highway today and it whines pretty loud, alot louder than I would expect. Around town, you don't notice it much, except in 3rd gear accel. I know it isn't bearing noise since it does not make any noise in neutral coast even at highway speeds. I am getting a very faint clunk type noise that sounds like the backlash is just too wide. I think .005 backlash would be better despite motive recommends .007-.009". What do you guys think?
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
I usually set mine up with mock-up bearings at .007 to .008 backlash, then with the new bearings installed, it tightens it up about one thousandth. So my first reading of .007 moves to .006. Then thats where I leave them.
i didnt see anything about your pinion depth. just because your backlash is correct doesnt mean the pinion is where it needs to be. i hate crush sleeves. i set mine up with a solid shim to replace it, and as much side bearing preload as i can possibly get without a case spreader. side bearing preload is your friend in these small basterds. it really helps keep down deflection.
i would recheck the pinion depth but all in all it could just be a noisy cut gear. nothing in the world can compensate for the machining process of the gears.....
i would recheck the pinion depth but all in all it could just be a noisy cut gear. nothing in the world can compensate for the machining process of the gears.....
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i didnt see anything about your pinion depth. just because your backlash is correct doesnt mean the pinion is where it needs to be. i hate crush sleeves. i set mine up with a solid shim to replace it, and as much side bearing preload as i can possibly get without a case spreader. side bearing preload is your friend in these small basterds. it really helps keep down deflection.
i would recheck the pinion depth but all in all it could just be a noisy cut gear. nothing in the world can compensate for the machining process of the gears.....
i would recheck the pinion depth but all in all it could just be a noisy cut gear. nothing in the world can compensate for the machining process of the gears.....
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Verdad Gallardo What are you using for mock up bearings? Are you just hogging out the inner race on an old set of bearings so that they aren't press on?
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Yea i ordered my bearing today for mock up. If your pattern Is on the face (When the ring is flat, this is the highest part) You need to raise the pinion, more shims.
When i say untouched space around the pattern and face, im refering to the actual name of the tooth part and the pattern. You pattern should be centered. not on any edge of the tooth.
No pattern on any edge is proper, will last longer, stronger, and quieter.
When i say untouched space around the pattern and face, im refering to the actual name of the tooth part and the pattern. You pattern should be centered. not on any edge of the tooth.
No pattern on any edge is proper, will last longer, stronger, and quieter.