u=joint u-bolt torque

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Aug 30, 2007 | 08:26 PM

tastyklair

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From: Eastern Pa

u=joint u-bolt torque

What should my u-bolts for the rear driveshaft be torqued to? Haynes says 90-100ft lbs. That seems awfully high to me.

Aug 30, 2007 | 08:33 PM

JBradley500

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From: America

until the lock washer flattens out plus 1/8th of a turn

Aug 30, 2007 | 09:26 PM

Mil1ion

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I doint know where you got that info but it goes by bolt size.

5/16" = 15 ft lbs

3/8" = 17-26 ft lbs

7/16" = 30-40 ft lbs

Aug 30, 2007 | 11:43 PM

fasthauler

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From: Hesperia, CA

I think we have the u-joint and the differential mixed up. The spring to axle housing U-Bolts are 110-160 ft-lbs. the U-Joint bolts are 8-15 ft-lbs for the 5/16, 17-26 for the 3/8, and 30-40 ft-lbs for the 7/16.

Aug 31, 2007 | 12:51 AM

Mil1ion

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I didn't .....as you can see

Aug 31, 2007 | 01:12 PM

scottie2hottie

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From: Honkytonkville

tightened until they snap then go buy new ones and don't make em quite as tight as before LOL

Aug 31, 2007 | 08:47 PM

JBradley500

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From: America

well most people dont use a torque wrench on u-joint bolts....

i got the information from mustang monthly from a few years ago...

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Aug 31, 2007 | 11:35 PM

fasthauler

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From: Hesperia, CA

Quote:

Originally Posted by JBradley500

well most people dont use a torque wrench on u-joint bolts....

i got the information from mustang monthly from a few years ago...

You would have to have a special kind of a torque wrench. I can barely get a box end wrench on my U-Joints. In 1977 I found one made by Utica and it was about $160.00. $126.00 for the torque wrench and $37.00 for the box end head that fits in it. You would have to buy another head at $37.00 each for each size of box end you needed. I decided that I would just continue using a box end wrench and tighten them up until they were snug. I have been doing this for over 50 years and have never had a U-Joint come loose.