Gear setup

[Johnl48]

What do you all think before I close her up ? Been playing with shims for 2 hrs

14 bolt rear




Backlash

[kwmech]

Pinion is too deep which 14b? full or semi

[Johnl48]

Originally Posted by kwmech

Pinion is too deep which 14b? full or semi

Full

[Getter-Done]

Keep playing.

Your not there yet.

[BASE]

I had the opposite problem with the one I just did. Drive side pattern was up on the heel and I had to get the pinion deeper to get it right. I think kwmech is correct, you are too deep.

[Johnl48]

This is .35 shim .9 backlash

[BASE]

Gosh, maybe I had it backwards. I'm looking at some of the pics and notes I kept and it was increasing shim (pulling the pinion out) that moved my drive side pattern towards the toe...

Here is a comparison of a couple of combinations I had tried (19 vs 35 pinion shim, 006 vs 007 backlash):

[Johnl48]

Originally Posted by BASE

Gosh, maybe I had it backwards. I'm looking at some of the pics and notes I kept and it was increasing shim (pulling the pinion out) that moved my drive side pattern towards the toe...

Here is a comparison of a couple of combinations I had tried (19 vs 35 pinion shim, 006 vs 007 backlash):

No matter what I do I can't get it to center on gear especially the drive side. Getting frustrated

[BASE]

I can understand that. I went through hell with mine before I realized the carrier was actually bent. I wish I could offer some more help, but I don't really mess with these things very often.

A common gotcha is being on the wrong side of the carrier break but I don't think you are that far off here. What size pinion shims have you tried so far?

[Johnl48]

Originally Posted by BASE

I can understand that. I went through hell with mine before I realized the carrier was actually bent. I wish I could offer some more help, but I don't really mess with these things very often.

A common gotcha is being on the wrong side of the carrier break but I don't think you are that far off here. What size pinion shims have you tried so far?

.18 to .42

[BASE]

Was the drive side down on the toe like that with 0.018 too? I'd be tempted to run a pattern with no shim just to see what it looked like.

[Johnl48]

Originally Posted by BASE

Was the drive side down on the toe like that with 0.018 too? I'd be tempted to run a pattern with no shim just to see what it looked like.

Actually got worse with the thinner shim
Does this look like my pattern ?

[Johnl48]

I pretty much started from scratch. Redone the bearing preload. This is with a .22 shim and .5 backlash. Hopefully someone gives me direction from here. Been taking way too long on this

Coast


Drive

[kwmech]

Focus on getting the drive pattern centered and get the backlash up around 8-10 and see where the coast falls. At least with the full float it is easy to change around relatively quick

[Johnl48]

Originally Posted by kwmech

Focus on getting the drive pattern centered and get the backlash up around 8-10 and see where the coast falls. At least with the full float it is easy to change around relatively quick

Ok, how do I do that lol. Been trying for 2 days. Took me an hr to get front right

[TurboThrift]

Originally Posted by kwmech

Focus on getting the drive pattern centered and get the backlash up around 8-10 and see where the coast falls. At least with the full float it is easy to change around relatively quick

This is good advice. A used gearset will be very difficult, sometimes impossible, to setup where you'll get a perfect pattern. Your patterns are not too bad

[Johnl48]

Hmmmm
From Yukon manual

[kwmech]

Put the 019 shim in and set the BL to 8 or 9. the picture you showed with the 19 and the bl at 6 isn't too bad. Open the BL a little and we'll see what it looks like. Is the nose cone assy already set up with the proper preload on the bearings? Do you have a really good flat file?

[Johnl48]

Originally Posted by kwmech

Put the 019 shim in and set the BL to 8 or 9. the picture you showed with the 19 and the bl at 6 isn't too bad. Open the BL a little and we'll see what it looks like. Is the nose cone assy already set up with the proper preload on the bearings? Do you have a really good flat file?

That's not my picture with the 19.
Yes pinion has proper preload
FYI these are used gears with new bearings

[BASE]

I’ve always heard that it’s hard to get a good pattern on a worn set. I think it’s often recommended to pay more attention to the coast side in that case as it’s not worn as much. I’ve never had any real experience with used ones but you might want to read up on that. You may just have to to get it centered face/flank and run it.

[4x41971SWB]

http://www.billavista.com/tech/Artic...tup/index.html

[Johnl48]

Starting to think you are right. Do you have a good source for the gears ?

[BASE]

The best deal I was able to find on the AAM gearset I wanted was at dennysdriveshaft. I bought a bunch of stuff through east coast gear supply as well. Both were good to deal with. Seems like the best price varies depending on what ratio and manufacturer you are looking at.

[Johnl48]

So I went with new ring and pinion and new spider gears
It looks a bit close to the top but this is without any shims and .007 backlash

[LONGHAIR]

That's more like it. The pattern seems a bit "bigger" than most, but that could simply be how much compound was applied. Look at the teeth further around, where the compound is rubbed back onto the gear too. That can tell you something too. Also, some of the look of the pattern is based upon how the manufacturer intends them to look. They can very a bit.

Make sure that you properly break it in with a few short heat-cycles. The lower the ratio, the more important this is, but don't neglect it.