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Old 03-11-2012, 11:34 AM   #1
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How Does it look...?

Hey everyone wanted to get some feed back to see if my rear pinion angle looks Ok.... I know a lot of you by just looking at it can tell...it's been really hard for me to get the vibes out... I tend to feel the vibes when I'm going up hill on the highway not so much in city driving
Thanks for the help
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Old 03-11-2012, 12:33 PM   #2
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Anyone ...? 😃

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Old 03-11-2012, 01:17 PM   #3
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I think it looks good. The pinion and drive shaft are in line and that's how mine has been for 8 years. I'm no expert, I've only done my own but from the diagrams I've seen and I think your right were your supposed to be.
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Old 03-11-2012, 01:22 PM   #4
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have you driven it set at that pinion angle yet?
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Old 03-11-2012, 05:26 PM   #5
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I haven't driven it yet....I just wanted some feed back before taking it for a test drive..... I'll keep you posted
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Old 03-11-2012, 05:32 PM   #6
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That looks good to me but do you have an angle finder to get exact measurements?
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Old 03-11-2012, 05:48 PM   #7
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Ok I went to measure it with the angle finder....do I set it at the rear yoke and then the middle of the drive shaft ....? I hear it's suppose to be 1* to 2* off....?
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Old 03-11-2012, 06:59 PM   #8
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Yep. The pinion angle should be 1* less than the driveshaft angle.
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Old 03-11-2012, 08:48 PM   #9
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The drive shaft is between 16-17* and the rear yoke is exactly at 15* so I guess I'm alright....? I guess the true test will be driving it.
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Old 03-11-2012, 09:00 PM   #10
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If you understand the physics of a universal joint and the difference between it and a constant velocity joint you will find your set up is good. You should get no vibration from what I see in your pictures.
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Old 03-11-2012, 09:05 PM   #11
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Quote:
Originally Posted by TJ-JAM View Post
The drive shaft is between 16-17* and the rear yoke is exactly at 15* so I guess I'm alright....? I guess the true test will be driving it.
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Old 03-11-2012, 09:09 PM   #12
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I dunno for sure, neither picture is great at showing the rear axle's pinion angle, but that pinion angle looks way too low to me. That strengthening rib on the pumpkin housing is pointing down below the angle of the driveshaft, it should be pointing directly at the CV, directly in line with the driveshaft. It looks more than low enough to cause vibrations.

It should look like this...
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Old 03-11-2012, 10:27 PM   #13
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Is this a better picture of the angle ...?
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Old 03-12-2012, 12:08 AM   #14
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I say take it for a test drive. Start off slow then get up to 65ish. If you have a rhythmic pulsing at higher speed you still have work to do. I like to pull the front shaft just to isolate it.

If you use an angle finder I have found measuring off the U-joint on the pinion side to work the best. Use the biggest socket you can fit and hang it off that.
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Old 03-12-2012, 05:59 AM   #15
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looks good to me
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Old 03-12-2012, 10:54 AM   #16
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Took it for a test drive still getting vibes... Should I tilt it up more .... I thought when you get vibes it's because your angling up too much... Or can it work both ways of too high or too low ....
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Old 03-12-2012, 11:36 AM   #17
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Anyone....Help...?
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Old 03-12-2012, 11:54 AM   #18
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Alright dude.....

What's your pinion angle and what's the drive shaft angle? They need to be inline. To be safe, set the pinion angle 1 or 2* below the drive shaft angle to account for bushing deflection.

Read this--it'll explain WHY the shaft and pinion need to be inline (aka, u joint seeing 0 degrees).

Tom Wood's Custom Drive Shafts - Tom Woods Custom Drive Shafts Custom Driveshafts Specialist
If they're inline or the pinion is a hair low just using your eyes, that's good enough and won't result in vibes if everything else is correct.
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Old 03-12-2012, 01:57 PM   #19
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New Pic with more incline up
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Old 03-12-2012, 02:03 PM   #20
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Nothing has changed. As above and my reply to your pm, your rear pinion angle is too low.
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Old 03-13-2012, 09:54 PM   #21
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Up or Down...?
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Old 03-13-2012, 11:42 PM   #22
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Jerry the strengthening rib needs to be aligned with the center of the drive shaft or the top part of the drive shaft ....? Still trying to get the right angle the last pic I posted is where I was last at tonight
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Old 03-13-2012, 11:56 PM   #23
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Quote:
Originally Posted by Jerry Bransford
Nothing has changed. As above and my reply to your pm, your rear pinion angle is too low.
I think it may be...the angle of the pic isn't great so it may be causing some confusion. Ive looked at my ds from 15 different angles and it always looks worse at the angle this pic was taken from.
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Old 03-14-2012, 12:09 AM   #24
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Quote:
Originally Posted by TJ-JAM View Post
Jerry the strengthening rib needs to be aligned with the center of the drive shaft or the top part of the drive shaft ....?
doesn't matter top or middle, just that the angles match
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Old 03-14-2012, 05:34 AM   #25
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too clean?
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Old 03-14-2012, 08:50 AM   #26
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Better picture of the angle....?
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Old 03-14-2012, 09:02 AM   #27
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You need to take your pictures standing a little further towards the rear, so the photo isn't taken from the front looking toward the rear. Take the photos standing slightly more toward the rear of the jeep so the camera is looking straight at where the pinion shaft connects to the drivehsaft.
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Old 03-14-2012, 09:06 AM   #28
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I don't get why you're so confused about how to do this......

What about "set the pinion inline with the drive shaft" doesn't make sense?

See the two circles on either side of the diff cover? Those are perpendicular to the pinion. You should be able to figure the rest out.
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Old 03-14-2012, 09:10 AM   #29
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Is this good or do I need to go further back...?
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Old 03-14-2012, 11:03 AM   #30
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What angle is the pinion at?
What angle is the drive shaft at?

Visually it looks OK from my vantage point....but instead of asking us, why don't you determine for yourself if it's OK by answering the above two questions?

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