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Discussion Starter #1
I just finished installing my 4.10's in the rearend. Can the specialists here take a look at the pattern and let me know if it looks ok or not? I've been looking at it so long, I can't see straight... ;)

The pinion was between 20-25in pds, I used new bearings all around. I have .010 of backlash on the ring gear.

Sorry for the pics, they are from my phone, and I had to use some white lithium grease as the marking compound.

Thanks in advance for your help!



 

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How many miles did you put on them and how long? Did they heat up enough? The pattern looks a bit off to me, but it could be the pictures. I'm used to seeing a more uniform pattern.
 

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Discussion Starter #3
I just installed them, so there are no miles currently on them.
 

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So that pattern I see on the teeth is the grease - I thought I was losing more eyesight.

Man, close that thing and heat them up!
 

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Discussion Starter #5
Yup, it's the grease. I didn't have any more marking compound to use.

I want to close it up, but I want to make sure it looks acceptable so I don't have to rip the damn thing apart again. ;)
 

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Discussion Starter #6
Here is a better picture. I cleaned off the grease and applied some marking compound.

 

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Bringing Yellow Back
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id run it

looks good to me
 

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Bringing Yellow Back
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heres a half ass pic of mine


you can see the patter on them

 

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Discussion Starter #9
Well I just took it for a test drive and it whines. :[

It's fine on acceleration and just holding speed, but when you get above 30 miles an hour and let off the gas is when it whines.

I guess I have failed. Tomorrow it looks like a trip to the shop to have the pro's do it. Sucks!
 

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It's hard to see by the pics, but the 2nd set of pics looks like the pinion depth isn't correct. It looks like the contact pattern is too far on the outside of the ring gear. But it's hard to see in the pictures.
 

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its common for gears to wine on decell while they are breaking in. yours sounds like it is whines at a little slow of a speed, but you never know. also you used way to much marking compound to really tell
 

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Discussion Starter #12 (Edited)
So what would you all suggest I do? Should I give it some time since they're new, or take it to a shop?

I took out the back seat because I wanted to hear it better, and I was planning on installing some torque box reinforcements this weekend. So I'm sure I'm getting a ton more noise than normal, but there's no doubt it's whining.

I used FR gears and measured the old one and it was the same as the new one with the original shim. But I could have the depth wrong, this is the first time I've attempted this.

Will waiting damage the gears forcing me to buy another set?

Really sucks, the guy that pressed on my bearings pretty much told me that I wouldn't get it right, sucks to have to take it to him and hear it!
 

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with frpp gears i have always re-used the factory pinion shim. then i torqe the pinion down to 12-16 inch lbs once the pinion is seated. pretty much i keep tightening the pinion nut untill it has no forward/aft motion then 12-16 inch pounds. after that i start with the factory carrier shims to get a base for my lash, re-lash it to .008-.01 and call it a day.
 

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Discussion Starter #14
So you're suggesting trying to tighten it up a little, I was at .10, so I should go to .08?

So that means I need to take a shim from the right and put it on the left hand side, correct?
 

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you should shim it correct. if your lash is at .1 your way off. it needs to be around .007-.01. you should have a shim kit so move the carrier to the right to tighten the lash up.
 
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