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Unread 04-20-2010, 11:38 PM   #1
Jeeper_YJ
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Help? Do you have a Ford 8.8 and 4" lift?

If you have a ford 8.8 and a 4" lift I need your help. Easy request Can you measure from the ground to the bottom of the axle flange where the driveshaft goes? I need that measurement.

Thanks

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Unread 04-21-2010, 12:03 AM   #2
Joe Dillard
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Tire size is going to play a part of this equasion.
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Unread 04-21-2010, 01:35 AM   #3
Jeeper_YJ
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33x12.5x15
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Unread 04-21-2010, 03:36 AM   #4
K4KAS
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Im guessing you are wanting pinion flange measurement. As stated it will vary between vehicles. Even with the same size tire. I am also guessing that you are trying to find the correct driveline angle. Somebodys measurement may get you in the ballpark, but I wouldnt trust it. The correct way would be to use an angle finder which can be found cheaply at home depo or lowes.
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Unread 04-21-2010, 06:53 AM   #5
DaveinHouston
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I've got that set-up but K4KAS is right. If you're trying to set the pinion angle put jack stands under the springs (so they are loaded with the weight of the Jeep) with the axle sitting in the perch on the springs. Adjust the angle of the pinion until the pinion and the driveshaft (obviously need the driveshaft installed) are straight and at the same angle. Some people say to have the pinion 1 degree lower than shaft to allow for axle wrap under acceleration but I didn't do that. Then tack weld the perches to the axle tubes. You can either weld it out under the Jeep or take the axle out to do it. I welded mine under the Jeep. I'll go take the measurement you've asked for a little later and send it to you.
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Unread 04-21-2010, 07:12 AM   #6
DaveinHouston
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The dimension on mine is 14 3/4" to the bottom of the flange. Photo attached. You can't really tell in the photo but he axle pinion and driveshaft are parallel (at the same angle).
hpim1259.jpg  
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Unread 04-21-2010, 07:12 AM   #7
Area.3.Fiftyone
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^^^ What he said ^^^

Use an angle finder and point it 1 degree down from what you need.
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Unread 04-21-2010, 08:05 AM   #8
Unii
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does anyone have a write up on how to set pinion angle.
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Unread 04-21-2010, 08:13 AM   #9
Jeeper_YJ
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It's already done. Just wanting to see if it was done right.

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Unread 04-21-2010, 08:53 AM   #10
everydayXJ
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I see a $1k 8.8 swap there and you didn't buy a $10 angle finder? Cool!

For what it's worth I recall my pinion being at 18 degrees and the shaft at 19.
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Unread 04-21-2010, 09:05 AM   #11
Jeeper_YJ
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Quote:
Originally Posted by everydayXJ View Post
I see a $1k 8.8 swap there and you didn't buy a $10 angle finder? Cool!

For what it's worth I recall my pinion being at 18 degrees and the shaft at 19.
$1k? someone got screwed? I didn't pay close to that. Axle at JY was $177 (4:10 w/LSD) + misc parts to install and labor $150

17 3/4" is what I got on the DS with a 4" lift and 33x12.5x15. I was told 17 1/4" to 17 3/4" was a common measurement for a 4" YJ lift. You got 19"?

I will measure from ground to flange in a few and post.

Live and learn!
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Unread 04-21-2010, 09:16 AM   #12
Unii
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Quote:
Originally Posted by Jeeper_YJ View Post
$1k? someone got screwed? I didn't pay close to that. Axle at JY was $177 (4:10 w/LSD) + misc parts to install and labor $150

17 3/4" is what I got on the DS with a 4" lift and 33x12.5x15. I was told 17 1/4" to 17 3/4" was a common measurement for a 4" YJ lift. You got 19"?

I will measure from ground to flange in a few and post.

Live and learn!
19 degrees not inches....
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Unread 04-21-2010, 09:20 AM   #13
K4KAS
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Man that's a clean Jeep belly!
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Unread 04-21-2010, 09:27 AM   #14
Jeeper_YJ
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Quote:
Originally Posted by K4KAS View Post
Man that's a clean Jeep belly!
Mine? Good or bad?
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Unread 04-21-2010, 09:28 AM   #15
Jeeper_YJ
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Quote:
Originally Posted by uni View Post
19 degrees not inches....
Gotcha. I'll have to check. What is the tool called so I can pick one up at Lowes?

Thanks
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