► I just need confirmation on some torque specs for the rear. - JeepForum.com

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post #1 of 20 Old 09-13-2011, 06:41 PM Thread Starter
klrstew
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► I just need confirmation on some torque specs for the rear.

Just want an "A ok" from someone to confirm my torque specs for my 8.8
install this weekend. I'm a bit of a novice and not 100% curtain about
names of everything is all. Der! I don't want to under torque so things fall
off, and don't want to torque down so hard I snap bolts. Can a couple
of you confirm for me please? I really appreciate it. Taking out the rear
and installing another is BY FAR the biggest mechanical wrenching I've ever
taken on. Just a little nervous is all.

this is how I understand it from the Torque Specs on the forum.

Driveshaft U-Join Strap Bolts - 14 ft-lbs

Where driveshaft connects to my 8.8 adapter flange.

Leaf Spring Eye-To-Shackle Bolt Nuts - 95 ft-lbs
Where I connect the leafs to the under carriage. rear

Leaf Spring Tie Plate U-Bolt Nuts (Rear) 0 44 ft-lbs
the nuts that tie the leafs to the dif. rear


This doesn't make any sense to me at all, but I'm not a mechanic. Both front top/bottom shock bolts are 45
and the rear top/bottom(I'm assuming because only "Rear" is stated not lower/upper like the front) 125??
That's a hell of a torque down, seems extreme.

Shock Absorber Upper Nut (Front) - 45 ft-lbs
Shock Absorber Lower Eye Bolt Nut (Front) - 45 ft-lbs
Shock Absorber Nuts (Rear) - 125 ft-lbs really, top and bottom?
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post #2 of 20 Old 09-13-2011, 08:11 PM
clarkjdg
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Quote:
Originally Posted by klrstew View Post
Just want an "A ok" from someone to confirm my torque specs for my 8.8
install this weekend. I'm a bit of a novice and not 100% curtain about
names of everything is all. Der! I don't want to under torque so things fall
off, and don't want to torque down so hard I snap bolts. Can a couple
of you confirm for me please? I really appreciate it. Taking out the rear
and installing another is BY FAR the biggest mechanical wrenching I've ever
taken on. Just a little nervous is all.

this is how I understand it from the Torque Specs on the forum.

Driveshaft U-Join Strap Bolts - 14 ft-lbs

Where driveshaft connects to my 8.8 adapter flange.

Leaf Spring Eye-To-Shackle Bolt Nuts - 95 ft-lbs
Where I connect the leafs to the under carriage. rear

Leaf Spring Tie Plate U-Bolt Nuts (Rear) 0 44 ft-lbs
the nuts that tie the leafs to the dif. rear


This doesn't make any sense to me at all, but I'm not a mechanic. Both front top/bottom shock bolts are 45
and the rear top/bottom(I'm assuming because only "Rear" is stated not lower/upper like the front) 125??
That's a hell of a torque down, seems extreme.

Shock Absorber Upper Nut (Front) - 45 ft-lbs
Shock Absorber Lower Eye Bolt Nut (Front) - 45 ft-lbs
Shock Absorber Nuts (Rear) - 125 ft-lbs really, top and bottom?
.
.
.
.
.
Here is from my "Chilton's" I've never used the Torque Specs from the Forum
Drive-shaft U-Joint Strap Bolts - 16 ft-lbs
Leaf Spring Eye-To-Shackle Bolt Nut - the front bolt to 95 ft-lbs, and the rear one to 105 ft-lbs
Leaf Spring Tie Plate U-Bolt Nuts - 90 ft-lbs
And I'm showing on the rear shock 45 ft-lbs on top, and 75 ft-lbs on the Bottom where it ties to the axle,
But this is from my "Chilton's" that's what I've always used!!!

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post #3 of 20 Old 09-13-2011, 09:03 PM
Anticanman
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You can tighten the spring eye bolts down to fewer ft lbs if you add nylock nuts to the ends of your bolts to negate the use of lock washers to ensure your bolts won't walk themselves out. Ubolts need to be pretty tight though. I got a little over enthusiastic on mine with the impact wrench and stripped the threads. No bueno!

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post #4 of 20 Old 09-14-2011, 11:09 AM Thread Starter
klrstew
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Quote:
Originally Posted by clarkjdg View Post
Here is from my "Chilton's" I've never used the Torque Specs from the Forum
Drive-shaft U-Joint Strap Bolts - 16 ft-lbs
Leaf Spring Eye-To-Shackle Bolt Nut - the front bolt to 95 ft-lbs, and the rear one to 105 ft-lbs
Leaf Spring Tie Plate U-Bolt Nuts - 90 ft-lbs
And I'm showing on the rear shock 45 ft-lbs on top, and 75 ft-lbs on the Bottom where it ties to the axle,
But this is from my "Chilton's" that's what I've always used!!!
thanks Clark, really appreciate it!
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post #5 of 20 Old 09-14-2011, 01:05 PM
JFranko
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Quote:
Originally Posted by klrstew View Post
Just want an "A ok" from someone to confirm my torque specs for my 8.8
install this weekend. I'm a bit of a novice and not 100% curtain about
names of everything is all. Der! I don't want to under torque so things fall
off, and don't want to torque down so hard I snap bolts. Can a couple
of you confirm for me please? I really appreciate it. Taking out the rear
and installing another is BY FAR the biggest mechanical wrenching I've ever
taken on. Just a little nervous is all.

this is how I understand it from the Torque Specs on the forum.

Driveshaft U-Join Strap Bolts - 14 ft-lbs

Where driveshaft connects to my 8.8 adapter flange.

Leaf Spring Eye-To-Shackle Bolt Nuts - 95 ft-lbs
Where I connect the leafs to the under carriage. rear

Leaf Spring Tie Plate U-Bolt Nuts (Rear) 0 44 ft-lbs
the nuts that tie the leafs to the dif. rear


This doesn't make any sense to me at all, but I'm not a mechanic. Both front top/bottom shock bolts are 45
and the rear top/bottom(I'm assuming because only "Rear" is stated not lower/upper like the front) 125??
That's a hell of a torque down, seems extreme.

Shock Absorber Upper Nut (Front) - 45 ft-lbs
Shock Absorber Lower Eye Bolt Nut (Front) - 45 ft-lbs
Shock Absorber Nuts (Rear) - 125 ft-lbs really, top and bottom?
.
.
.
.
.

I'm not sure about all of those, my service manual is 3 hours away, but the u-bolts look right, and the flange for the 8.8 look very low. Torque spec for the flange is somewhere around 90 ft/lbs, and make sure to use some blue loc-tite on the bolts also.

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post #6 of 20 Old 09-16-2011, 10:56 AM Thread Starter
klrstew
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Quote:
Originally Posted by JFranko View Post
I'm not sure about all of those, my service manual is 3 hours away, but the u-bolts look right, and the flange for the 8.8 look very low. Torque spec for the flange is somewhere around 90 ft/lbs, and make sure to use some blue loc-tite on the bolts also.
good point Franko, I actually don't have that spec.

Anyone know the torque spec on the 8.8 flange?
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post #7 of 20 Old 09-16-2011, 03:08 PM
clarkjdg
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Quote:
Originally Posted by clarkjdg View Post
Here is from my "Chilton's" I've never used the Torque Specs from the Forum
Drive-shaft U-Joint Strap Bolts - 16 ft-lbs
Leaf Spring Eye-To-Shackle Bolt Nut - the front bolt to 95 ft-lbs, and the rear one to 105 ft-lbs
Leaf Spring Tie Plate U-Bolt Nuts - 90 ft-lbs
And I'm showing on the rear shock 45 ft-lbs on top, and 75 ft-lbs on the Bottom where it ties to the axle,
But this is from my "Chilton's" that's what I've always used!!!
Well that's what my ^"Chilton's" ^ called for (Leaf Spring Tie Plate U-Bolts Nuts - 90 ft-lbs) on the 35, I guess it should be the same as on the 35 still being tied to the Jeep leafs.

LIVE EVERY DAY LIKE IS WAS YOUR LAST...
/_|__\___\
[n___n_[*lllll*]
(o) )-(o) )-*-) )
88 YJ, Smittybilt SRC Front, Side, and Rear Armor, Family Roll Bars, TJ Flares, and Half Doors
4"Leaf, 2"Body, and 1"Leaf Lift, 4.10 Geared Dana 30 Posi with Cable Engage, Ford 8.8 Posi, With 33s BFGs MT KM2
Everything "Black" Inner, Under, and outer "Black" on the Body is "Bed Linered" and I will be Thru the day that I Die!
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post #8 of 20 Old 09-16-2011, 05:56 PM Thread Starter
klrstew
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Quote:
Originally Posted by clarkjdg View Post
Well that's what my ^"Chilton's" ^ called for (Leaf Spring Tie Plate U-Bolts Nuts - 90 ft-lbs) on the 35, I guess it should be the same as on the 35 still being tied to the Jeep leafs.
Cool, thanks Clarkjdg that WAS useful information I appreciate it,

but, I thought the "leaf spring tie plate u-bolts nuts" were the nuts that
hold on the plate(on the bottom) for the u bolts that hold the dif to the springs, no?

I found another thread in regards to this subject. I'm getting anywhere between "snug, and an extra 1/4 turn with blue lock tight" and "90 ft lbs with blue loc tight." So, I'm going with 80 with loc tight, i think. lol
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post #9 of 20 Old 09-16-2011, 07:25 PM
leftlanetruckin
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Quote:
Originally Posted by klrstew View Post
this is how I understand it from the Torque Specs on the forum.

Driveshaft U-Join Strap Bolts - 14 ft-lbs

Where driveshaft connects to my 8.8 adapter flange.
Call me an animal, but I have yet to use a torque wrench on a driveshaft. With lock washers or nylok nuts, I just tighten them down and be done with it. Hell on a CV shaft they are 8mm any way, and not a lot of room to get anything but a wrench in there on some.

Leaf Spring Eye-To-Shackle Bolt Nuts - 95 ft-lbs
Where I connect the leafs to the under carriage. rear
Noce recipe for a rough riding POS...I do shackle bolts to 45ft lbs with blue thread locker and nylok nuts. This allows the shackle to do its job instead of being so tight it cannot move
Leaf Spring Tie Plate U-Bolt Nuts (Rear) 0 44 ft-lbs
the nuts that tie the leafs to the dif. rear
U bolts get the impact. I dont use cheap crap u bolts, so never had an issue stripping threads. I would go tighter than 44 ft lbs though myself, even with nyloks or locking washers.

This doesn't make any sense to me at all, but I'm not a mechanic. Both front top/bottom shock bolts are 45
and the rear top/bottom(I'm assuming because only "Rear" is stated not lower/upper like the front) 125??
That's a hell of a torque down, seems extreme.
Shocks also get done by feel. I snug them down good and thats it
Shock Absorber Upper Nut (Front) - 45 ft-lbs
Shock Absorber Lower Eye Bolt Nut (Front) - 45 ft-lbs
Shock Absorber Nuts (Rear) - 125 ft-lbs really, top and bottom?
.
.
.
.
.
Martin

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post #10 of 20 Old 09-17-2011, 04:36 PM Thread Starter
klrstew
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Thanks Martin. Was just going over this. Got the dif cinched up and ready to torque. Thanks for your input.

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post #11 of 20 Old 09-17-2011, 05:36 PM
Anticanman
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How does the pinion angle look?

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post #12 of 20 Old 09-18-2011, 09:46 AM Thread Starter
klrstew
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Quote:
Originally Posted by Anticanman View Post
How does the pinion angle look?
Like this. God I hope that angle is acceptable. The dif DOES look a little steep upwards. I got those wedges on the springs still.

Drum roll ................

.

I'm gonna have to lose the wedges, huh?
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post #13 of 20 Old 09-18-2011, 10:12 AM
Anticanman
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You're definitely going to have to play with it. As the tires kick down, the pinion is going to kick up and you'll have a little binding on takeoff. You need to lower the pinion angle or raise the jeep. Haha

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post #14 of 20 Old 09-18-2011, 10:57 AM Thread Starter
klrstew
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Quote:
Originally Posted by Anticanman View Post
You're definitely going to have to play with it. As the tires kick down, the pinion is going to kick up and you'll have a little binding on takeoff. You need to lower the pinion angle or raise the jeep. Haha
Alright, so I have to lose the wedges. DAMN!

I don't notice any binding at all, not to say I'm not going to fix the angle, just
sayin'. I only drove it like a half mile around the neighborhood. Do you think
it's a bad enough angle to not even drive it? Once I get this goof fixed, how
long after driving around would be good time to go back and check my torques
and what not?

No leaks (yet) No noises, besides little pings of the parts settling.
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post #15 of 20 Old 09-24-2011, 08:45 PM Thread Starter
klrstew
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ok, took out the wedges. Angle is much improved, don't you think?
I have to say, I'm getting good at this. Had the rear end off, wedges
off and put back on in about 2 hours. lol


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Oh, MAN that's true and I just started. lol

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