Seasoned Gear Installers Check My Pattern!

[RockMonkey]

This is the first time I've set up a 9". I initially ran into a problem with the ring gear contacting the housing before I could get it close enough to the pinion for the right backlash. I was confused for a second until I checked out another third member I had laying around. The part of the housing that was touching my ring gear was milled away on the other housing, so out came the grinder and I took care of that problem. Pinion and carrier bearing preload is good, and there's 7 thousandths backlash. Here's pics of the pattern:

It looks runnable to me. If anything I think I could take out a few thousands from the pinion shims to move the pinion just a touch deeper. What do you think?

 

[BCGPER]

I wouldn't hesitate to run it......

I've never had to mod a 9" housing (but I'll admit, I've only done a couple). How low of ratio did you go?

 

[RockMonkey]

4.88 gears. I wouldn't have had to touch the other third member, it was already milled down, this one wasn't. That probably has something to do with the 3.50 gears that were previously in this third, VS the 5.13s that were in the other third.

Thanks for the opinion on the pattern.

 

[I Lean]

Runnable, but I'd go a touch deeper. Do you have pinion shims left to remove?

 

[Milner]

Nothing different to add

 

[RockMonkey]

Runnable, but I'd go a touch deeper. Do you have pinion shims left to remove?

There's one pinion shim in it. I think it's 20 thousands and I'm sure I have thinner ones I could put in.

 

[Kiel]

Like Carl said I would go deeper. Otherwise looks good

 

[Milner]

Like Carl said I would go deeper.

 

[RockMonkey]

I went to the next thinner shim. This looks good to me.

 

[I Lean]

Better....but if you're willing to spend the time, I'd like to see the pattern if you went one step deeper with the pinion again. It might be too deep and you'll end up where you are now, or it might be better. That drive side pattern still looks a tad on the high side to me.

 

[RockMonkey]

It hardly takes any time at all. I'll try it with a few thousandths less shim.

 

[zukgod1]

This is a awesome thread, I cant tell ya how many time someone has asked me "what should the pattern look like".
Now I can just send them a link
Love it..

 

[Milner]

Better....but if you're willing to spend the time, I'd like to see the pattern if you went one step deeper with the pinion again. It might be too deep and you'll end up where you are now, or it might be better. That drive side pattern still looks a tad on the high side to me.

Agreed, the teeth are tall ehough on a nine, and easy enough to do, take a little more....

 

[RockMonkey]

I went from 16 thousandths to 13 thousandths shim. Not as pronounced a difference as the last change. What would you do now? It doesn't take more than a few minutes to change it. I'd rather do it right than fast.

 

[I Lean]

BAM! Now add copious amounts of carrier bearing preload, check your backlash one last time, and slap that sucker in.

 

[mbryson]

BAM! Now add copious amounts of carrier bearing preload, check your backlash one last time, and slap that sucker in.

I was wondering when that would come into play.

 

[RockMonkey]

BAM! Now add copious amounts of carrier bearing preload, check your backlash one last time, and slap that sucker in.

Woot! No slapping it in, the housing's not ready yet.

Thanks!

 

[redXJ]

nice wright up i have had many people tell how to do this. know i get what they mean.

 

[RockMonkey]

nice wright up i have had many people tell how to do this. know i get what they mean.

Write-up? This is no write-up. It is definitely a good resource if you already know the process but don't have a lot of experience reading the pattern. As it turns out, my original interpretation was correct. I just needed confirmation to give me confidence. Hopefully this thread can do that for others too.

 

[Bart]

Nice job Braden. That sure looks easier on a 9 inch than a 44 or 60.