Gear Contact Pattern

[Khoule]

One of my first posts on here so not sure if there is a separate section for this but I am just looking to get a few more opinions on my contact pattern. Some spots seem pretty dead on and others seems closer to the toe(newbie so not sure if I am interpreting the pattern correctly). Setting up 4.88 gears in an 02 Tj rear Dana 44. Backlash is right at .007. Thanks in advance

 

[Mrhp]

I am sure your backlash is .007 not .07. Nice flat contact across the tooth. Centered decent. I would run it.

 

[Mrhp]

Make sure to check your backlash in 4 or 5 spots. You will rarely, if ever get a picture perfect pattern. I have been setting up gears for 30 years, and have had only a handful of perfect patterns. It is always a compromise.

 

[tworley]

That looks pretty good, I'd run it too. Good job. @hosejockey61

 

[MangoTango]

I don't have 30 years experience like Mrhp, but I do my own gears. I would run that pattern as along as the BL is within spec.

*Edit* I hope you mean the BL is 0.007" and not 0.07".

 

[Khoule]

Yes, sorry my backlash is at .007 must’ve autocorrected when I typed it in. Thank you guys for the help. Had a few other people tell me it was good but more opinions never hurt! @MangoTango @Mrhp

 

[hosejockey61]

Looks great! Run it.

 

[sierradmax]

On the drive side, I like to try and get a pattern favoring the toe. Overtime, the pinion contact will work its way towards the center of the tooth.

 

[pc1p]

It's not bad at all and should be good to go...

That said, depending on what you may have already tried, I would have tried moving the pinion away from the ring gear slightly, maybe 0.002". When I see that hard/sharp line at the bottom of the ring gear tooth, it's usually indicative that you're a touch too deep. Sometimes you can get it to disappear without issue, sometimes it causes the pattern to hit a tad too high on the crown.

 

[hosejockey61]

It's not bad at all and should be good to go...

That said, depending on what you may have already tried, I would have tried moving the pinion away from the ring gear slightly, maybe 0.002". When I see that hard/sharp line at the bottom of the ring gear tooth, it's usually indicative that you're a touch too deep. Sometimes you can get it to disappear without issue, sometimes it causes the pattern to hit a tad too high on the crown.

In my experience you can't always eliminate the line at the root no matter hard you try. It is more desirable if you can, it's just that it's not always possible. I think this pattern is very good, especially for a first timer.

 

[Blackjack]

It's not bad at all and should be good to go...

That said, depending on what you may have already tried, I would have tried moving the pinion away from the ring gear slightly, maybe 0.002". When I see that hard/sharp line at the bottom of the ring gear tooth, it's usually indicative that you're a touch too deep. Sometimes you can get it to disappear without issue, sometimes it causes the pattern to hit a tad too high on the crown.

In my experience you can't always eliminate the line at the root no matter hard you try. It is more desirable if you can, it's just that it's not always possible. I think this pattern is very good, especially for a first timer.

I would like to see that line gone too but hosejockey61 is correct you would be hard pressed to make it go away. If you look at the pattern it is pulling paint pretty hard on the crown side of the oval and moving that up could put it in a position to run off the crown under load. I would maybe open the backlash up a couple thou to see what that would do but really it would run fine just the way it is.

 

[pc1p]

In my experience you can't always eliminate the line at the root no matter hard you try. It is more desirable if you can, it's just that it's not always possible. I think this pattern is very good, especially for a first timer.

Agreed there, which is why I said it would depend on what he may have already tried. I always like to try though, if for not other reason than it helps me sleep better

I would like to see that line gone too but hosejockey61 is correct you would be hard pressed to make it go away. If you look at the pattern it is pulling paint pretty hard on the crown side of the oval and moving that up could put it in a position to run off the crown under load. I would maybe open the backlash up a couple thou to see what that would do but really it would run fine just the way it is.

He's a bit toe-heavy on the drive side to my eyes, so backing it out a tad could/should help with the root line and may help center it up some. I prefer to be a bit toe heavy in general and wouldn't be worried if this was the best pattern I could get, but I would certainly want to see how it looks with the pinion moved back some before putting the cover on for good.