Differential pattern rabbit hole.

[flintknapper]

Ask Ken at Toyota Gear Install Harrop

He is the authority on gear setup for these. Doesn't matter much on opinion of everyone else. He has thousands of these under his belt, as he does it for a living, and he's damn good at it.

Look up the one for Kittery Point, Maine and read the bio he did on it. You'll get a lot of GREAT info!

Without question ZUK is the man.

 

[nukegoat]

Ask Ken at Toyota Gear Install Harrop

He is the authority on gear setup for these. Doesn't matter much on opinion of everyone else. He has thousands of these under his belt, as he does it for a living, and he's damn good at it.

Look up the one for Kittery Point, Maine and read the bio he did on it. You'll get a lot of GREAT info!

True, but used gear patterns is not the place to learn

 

[Bear80]

This more than anything is a learning experience...I can tell you that unlessI feel confident in a pattern I wont run it...I am leaning very hard towards purchasing new gears.

Sounds to me like your mind is made up. The first two sentences don't belong together and especially as it seems gear setups are past your abilities.

Ken aka ZUK is a great resource. But I've done plenty of Toyota truck 8" diffs and a handful of 9.5s. I can tell you that the perfect pattern you want is not gonna happen. You have limited control on the coast being at the toe. For the drive side...like I said get some resistance on the pinion or ring gear so you get a clearer pattern impression. After that I would bet the house the original shim provides the best depth.

 

[gearinstalls.com]

Hi Crusty-
All of those paints are way too deep. Try it with ZERO shim.
Then I'll tell you what I'm thinking......
Ken

 

[CrustyRusty]

Hi Crusty-
All of those paints are way too deep. Try it with ZERO shim.
Then I'll tell you what I'm thinking......
Ken

Thanks I really appreciate it. I'm at work but will send you pattern with zero shim asap

 

[nukegoat]

Hi Crusty-
All of those paints are way too deep. Try it with ZERO shim.
Then I'll tell you what I'm thinking......
Ken

I told him shallower. I knew it.

And ring gear bolts to about 5 in lbs is best

 

[CrustyRusty]

Got home from work and took out all the pinion shims. Set the back lash at 6 thousandths

 

[CrustyRusty]

I told him shallower. I knew it.

And ring gear bolts to about 5 in lbs is best

I definitely agree with the fact the pinion needed to be shallower. How ever I was not aware it was acceptable to exceed the thinnest factory shim. Now I known

 

[CrustyRusty]

I told him shallower. I knew it.

And ring gear bolts to about 5 in lbs is best

Ring gear bolts at 5 inch pounds eh? Humm maybe I'll just set the pinion pre load to finger tight

I definitely agree with the fact the pinion needed to be shallower. How ever I was not aware it was acceptable to exceed the thinnest factory shim. Now I known

 

[gearinstalls.com]

With zero shim it at least did what I expect it to do....it moved from the toe end deep in the root to the heel end to the extreme tip.

There is the possibility you have a bad used ring gear but before we say that....this time put a shim between 0 and 70.... I think 035 will tell us more.

And while you have the pinion out, make a really good double check to make sure the inner race is tapped all the way in.

Also, sorry about the additional hassle of trying to get the pinion bearing off with zero shim.....not much room to get the bearing separator in there.

Best way to get a good easy to read painted pattern is to grab the pinion flange with a towel and turn the ring gear back and forth with a 17mm wrench. If those are re-used factory lock-tabs on the 10 ring gear bolts then you might consider ditching them. Red loctite and 70 ft/lb is a good method.

EDIT-----Hold on Crusty. I looked at the pictures and shims you used closer and I'll catalog my thoughts in the next post......

 

[gearinstalls.com]

OK....Crusty you had a severely Yucky pattern and you were making "micro" changes when you really needed to make BIG changes to affect pattern.
You started with .....

o752 drive way deep
coast extreme toe

0745 pretty much same

0725 pretty much same but improving

0715 improving

068 same as 0715

0665 still deep

083 wrong direction



Nuke goat recommend to try 058 and I do too. That's the last try...


I'm sure it won't be very pretty with even 058 and let's see.....like some of the others said ....pretty worn gears. If 058 does not look super then that gears set for sure is a piece of something. Used gears are "more interesting" but your set is being ridiculous.

 

[CrustyRusty]

was able to get the pinion bearing off no problem. I had the right tools for the job and already tuned up my bearing separator with a die grinder to accommodate this pinion before I started reducing shims. It just grabbed the lip if the bearing nicely and didn't put any pressure the bearing cage while pushing the pinion through

pressure on

 

[CrustyRusty]

re shimmed the pinion to 0.0585 and set the back lash to 0.006

 

[CrustyRusty]

also all bearing races are seated properly. And if you recommend ditching the lock tabs I will absolutely do that. I used your method with the 17mm wrench to obtain this pattern. Definitely allot easier then what I was doing

 

[Grandlooser]

Does the race have a shim behind it by chance? It's crazy you can't pull that pattern out any. But then I've never tried to set up used gear sets.

 

[CrustyRusty]

There are no shims behind the bearing race. And I should have mentioned all the bearings are brand new

 

[Grandlooser]

Maybe try the worn one? Lol

 

[gearinstalls.com]

Same bearing separator I use....and I also tuned mine just for those same situations

That ring and pinion is trash

 

[flintknapper]

Same bearing separator I use....and I also tuned mine just for those same situations

That ring and pinion is trash

Yep.

The man has spoken.

 

[CrustyRusty]

Right on. I'm sure allot of us suspected that including myself. I'm happy things are moving forward. Now the only question that remains is who to buy gears from nitro?