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Driveline angles

 
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Old 02-15-2019, 11:32 PM
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Driveline angles

So I've been searching and searching but can't find the answer to my question...

I have an obs ford that's getting a new drive line.

My rear transmission output is 4 degrees up to the front.
Driveshaft is 15 degrees up to the front.
pinion is 5 degrees up to the front.

If I can get my rear yoke back in spec like 3 degrees up to the front to account for axle wrap... then by my math I'll have a operating angle of 11 degrees.

I've read that 3 degrees is optimal...

How bad is 11 degrees?

With 1410 joints am I going to have to replace them every week?

Any comments are appreciated
 
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Old 02-17-2019, 02:45 AM
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So is 11 degree ujoint angle to much for a daily driver ?

Somebody has to know lol...
 
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Old 02-17-2019, 01:13 PM
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That is a bit extreme for driveline angles. As a daily driver you would be replacing u joints often. I think the max is 6 degrees for that u joint.
 
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Old 02-19-2019, 08:17 PM
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Mmmm... that's not good news...

That u joint... y mean the 1410?

I was hoping the 1410 might b a little better seeing as it has a 35 degree max angle...

Sounds like I'm going to be one of those guys who carries a ujoint and wrench in his truck at all times lol...

If I wanted to go with a CV... how much can I tilt the 10.25 before it causes issues?
 
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Old 02-20-2019, 02:08 PM
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Ok so your saying that your output shaft on trans is pointing down toward the rear axle of vehicle if looking from the front of truck? What your going for is the rear axle should point up toward the trans on the same plane as the trans. So if the trans is down 4 degrees then the optimum setting for rear would be 4 degrees up. But the front would be the opposite. The trans would then be 4degrees up not down, and the front axle input would point down 4 degrees. Ive probably confused you now. Check out www.4xshaft.com > driveline 101. It will explain everything you are asking.
 
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Old 02-20-2019, 06:36 PM
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Yes you have confused me...

The angles are parallel...

I thought when referring to driveline angles they were all referenced by what they did at the front... so a pinion pointing down to the ground would be ** degrees down to the front and a pinion pointing up to the sky would be ** degrees up to the front... same with transmission. Transmission output pointing down to the ground is ** degrees up at the front...

Either way my my angles are parallel...

My bad if I'm not describing it properly lol
 
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Old 02-20-2019, 06:41 PM
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As it is doesn't look good for tilting my rear pinion up for a double cardan joint... the np241dhd has no ability to have a flange put in it...least that's what its looking like...

Edit the driveline shop said no dc for my np241 transfer case....
 
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Old 02-22-2019, 06:51 PM
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Just thought I'd update for anyone who might be wondering about their driveline angles. .

11 degrees is acceptable... confirmed from several people and two repeatable shops. But no two trucks are the same and there are other considerations like length of driveshaft and type of u joints... but ujoint life will be lower than expected... but vibration shouldn't be an issue... something I was worried about.

some good reading for those who need a better grasp of driveline angles:

Tom Wood's Custom Drive Shafts - Driveline 101

https://www.pirate4x4.com/tech/billa...aft/index.html
 
 


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