Quick questions about the axle nuts

[WildHorse]

Are they 1 time use only ? I see various answers to this and the service manual doesn't mention it ? or I'm blind to the fact haha. Thanks.

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[luc]

1 time use

 

[Mikepol2]

I used two CCPZ-3B477-F Ford rear axle spindle nuts for $19 each on Ebay when I installed the 4.09's. The threads had a blue-green threadlocker coating. The Ford Performance rear differential cooler instructions say use new axle nuts if you have the stock half shafts.

 

[WildHorse]

I used two CCPZ-3B477-F Ford rear axle spindle nuts for $19 each on Ebay when I installed the 4.09's. The threads had a blue-green threadlocker coating. The Ford Performance rear differential cooler instructions say use new axle nuts if you have the stock half shafts.

Yeah the Ford dealership had 4 left in stock. So i bought em all. Better safe than sorry. Thanks guys !

 

[Elp_jc]

But if they just got loose, no need to change them, right? Just tighten them back up? I'll check mine soon, maybe setting the torque wrench to 100 ft/lbs, and if it 'clicks', leave it alone. My car only has 4K miles, but saw several reports of the axle nuts (especially the left one) being loose even on new cars. If torque wrench clicks, then will just mark them, in case they get looser in the future. Is my checking method okay? Or do you recommend any other ft/lb setting? Thank you.

 

[WildHorse]

But if they just got loose, no need to change them, right? Just tighten them back up? I'll check mine soon, maybe setting the torque wrench to 100 ft/lbs, and if it 'clicks', leave it alone. My car only has 4K miles, but saw several reports of the axle nuts (especially the left one) being loose even on new cars. If torque wrench clicks, then will just mark them, in case they get looser in the future. Is my checking method okay? Or do you recommend any other ft/lb setting? Thank you.

It's 90 lbs-ft plus a additional 45 degree which would bring it to over 200 lbs-ft. Marking the nut is always a good idea.

 

[Elp_jc]

Thank you, but that's to tighthen them. I don't want to loosen them, since they'd require new nuts. Plus they're probably fine. Just want to apply certain torque to make sure they're not loose. Would 100 ft/lbs be fine?

 

[WildHorse]

Would 100 ft/lbs be fine?

No. Cause as I said the final torque is over 200 ft bs. So if it clicks off at say 110 that could be only half. Set it to like 200. You should be fine.

 

[Mikepol2]

The shop manual says 98 ft-lbs, plus an additional 45 degrees of rotation. Keep in mind also that there are two types of torque - static (breakaway) and dynamic. When you torque something till the wrench clicks, then try to torque it again, it takes a higher torque to get the fastener turning than it does to keep it moving. So torque till it clicks at 98-100, then turn it another 45 degrees. I did this on both new rear axle nuts after the 4.09 installation and have had no problems with them loosening after 18 months of driving on them, with no addition of threadlocker to what was already on the new axle nuts.

 

[Dana Pants]

If you re-use them, and I have, make sure to give them some lock-tite.

 

[Plimmer]

If you re-use them, and I have, make sure to give them some lock-tite.

Agree with this. I’ve reused mine multiple times without issue. I’m guessing they list them as single use because of the blue thread locking material on the new nut.

 

[NightmareMoon]

Thank you, but that's to tighthen them. I don't want to loosen them, since they'd require new nuts. Plus they're probably fine. Just want to apply certain torque to make sure they're not loose. Would 100 ft/lbs be fine?

Testing them with only 100ft/lbs or torque won’t tell you anything. Won’t hurt them tho either, just kind of useless exercise.

Your wheels require 150ft/lbs. sounds like you need a bigger torque wrench!

 

[Dana Pants]

250 ft-lb won’t move a properly torqued axle nut.

 

[TopJimmyCooks]

For what it's worth, it is good to check the torque now and again. From what I can gather axle nuts coming loose on S550s is "a thing". I've had it twice now on mine. I didn't catch the first one in time and it ate the bearing up.

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