Wow nobody???

I guess all the write up finatics have a new topic.

 

What stage are you at?

I'll see if I can find some write-ups.

Edit:

Check some of these out:

http://www.jeepforum.com/forum/f12/dana-30-setup-help-824762/

http://www.jeepforum.com/forum/f11/dana-30-44-gear-install-writeup-853869/

http://www.jeepforum.com/forum/f9/dana-30-gear-set-up-873759/

Install from Spicer. It's for a CJ D30 but same concept

http://www2.dana.com/pdf/5304-2.pdf

D44 Video of gear install, again same concept.

http://www.spike.com/full-episodes/...-international-scout-part-ii-king-of-stock-mods-kurt-shramovich-season-3-ep-409

I also have some D30 gear patterns of when I did my gear install if you want them.

 

AWESOME!!!! thank you.

 

No problem. Feel free to post pics of some patterns so we can see how it looks.:cheers2:

 

god I have to learn how to resize...

 

this is sporting a .009 backlash on used setup bearings. comments anyone?

 

Ok this pattern is after all new bearings and races with a .007 backlash everything torqued to spec with a used pinion nut.

 

looks like the pinion is a little bit too deep.

 

Have you put a load on the carrier when checking the pattern? You should have a resistance against the carrier that takes about 50ftlb to turn the pinon. You get a more defined pattern.

It does look like you need to add pinion shims. I'd make a large move, .005-.008" to start then dial it back.

 

I would put a little resistance on the ring and spin the pinion to get a better pattern. I used a block of wood between the housing and ring gear.

A couple from my D30 setup. My backlash was a little tight at .004" but I think everything settle and it's been fine for the last 3 years.

 

Ok after some tinkering and a better pattern this is what I have with a .007 backlash

 

From other photos im seeing this pattern look pretty good IMHO. However Im not the Dana 30 expert. :brickwall

 

Hi,
The Factory Service Manual has good pictures of proper contact patterns. Also, I believe Randys Ring and Pinion has a good write up.

Sparky

 

Comments ?

 

I would put a little resistance on the ring and spin the pinion to get a better pattern. I used a block of wood between the housing and ring gear.

A couple from my D30 setup. My backlash was a little tight at .004" but I think everything settle and it's been fine for the last 3 years.

My patterns now look just about like yours I think I'm close enough. What do you think?

 

Whats the run out on that gear and the carrier? Hows the pattern look 180° off from that spot?

it may just be that picture but it doesn't look like all the contact points on the teeth are in the same positions.

 

Im not sure what you mean by run out? Its a 4:88 gearset from standard with a detroit Trutrac Here is a pattern 180 degrees from the normal spot. tell me what you think.

 

i usually do whine a bit about large photos, but you could upload bigger ones in this case.

lateral run out is the horizontal movement of the ring gear or carrier as you spin it. like sideways back lash.
you'd set up your dial indicator perpendicular to the outside face of the carrier flange for the carrier, and the out side of the ring gear for that. it's one of the first measurements you should take after getting your initial carrier shim stack sorted out. it lets you know if your carrier is bad, the ring gear is warped or not seated right, or the housing is bad. excessive run out will also show up as wonky patterns or not being able to get a decent pattern at all 3 spots on the ring gear you should be checking with marking compound.

your last pattern still looks a touch too deep, i'd make small moves towards the ring gear and tighten up that bl till your pattern is a bit more toe shifted. that's known as a "race" set up. you'll be running larger tires that put a higher load on the axle, you want the bl good and tight because it will force it's self apart, opening up the back lash, when you're on it.

look at louie's pictures. you're after a more oval pattern and you've still got a bit of a half moon going on from the looks of things. make sure you are putting some good resistance on that carrier when checking the pattern.

 

I agree with ratmonkey. I know when I set mine up I put a hell of a lot of pressure on the ring gear to get a very visible pattern. I also checked the pattern on opposite sides of the ring gear and checked the backlash at a couple positions as well. When I was checking my patterns I kept the Yukon install pamphlet on my work bench. It was a lot of help.

http://pirate4x4.com/tech/billavista/PDFs/Yukon Gear Ring and Pinion installation instructions.pdf

Looking good though. I would shoot for a pattern a little closer to the toe end (inside) for strength and like ratmonkey said, have a tighter backlash. My D30 backlash was .004" in those pics but it I figured it would open up on the trail and since it's the front it won't be the main drive axle.

Post up again on your next run. Just make sure to keep a record of each setup so if you start getting further away or make a drastic change you'll know which setup to go back to. Keep up the good work:cheers2:.

 

Thanks for the guidence everyone I really appreciate it. Here is the latest pattern with a .005 backlash These are bigger pictures for contex only sorry for the display

 

stuff a wooden wedge under that ring gear and turn the gear past the pinion 4-5 times with even pressure. do one side, take a pic, do the other.

but really, only the drive side matters when you're close.

the back lash is pretty good in that shot, still looks like the pinion is too deep. getting closer.

 

subscribed.. doing this same gear setup soon!

 

Sorry I haven't been able to post much lately. Working to many hours. I do have a question about pinion preload. I'm going to be adjusting my pinion stack tomorrow and want to know if its ok to leave out the preload shims and just torque the nut down untill I have my preload and when I get the correct pattern and backlash set then add the preload shims? Will adding the shims afterward jack up by backlash or contact pattern?

 

Sorry I haven't been able to post much lately. Working to many hours. I do have a question about pinion preload. I'm going to be adjusting my pinion stack tomorrow and want to know if its ok to leave out the preload shims and just torque the nut down untill I have my preload and when I get the correct pattern and backlash set then add the preload shims? Will adding the shims afterward jack up by backlash or contact pattern?

No, because the preload shims put space between the outer pinion bearing and race to adjust the amount of contact pressure. The only way to adjust the pinion depth is with the shims under the inner race. At least that's how mine was.

 

That's how mine is too. So I need to adjust pinion depth and preload shims all at the same time?

 

No. Once I didn't put any preload shims in until the end once I had my pinion depth set. However I didn't run the pinion nut down too much. Just enough so there was a slight drag so I could get a good pattern.

 

This is with a .005 pinion shim adjustment and .006 backlash and I have the pinion bearing preload set at 18 inchlbs with just the nut. I cant get close enough with the shims that g2 sent me in my rebuild kit. I'm going to have to call them about that. I'm either to far out or to far in on pinion preload.

 

I think I'm going to run this pattern.