Rear Axle IRS Nut Tq

[Railroad]

I have been making some good progress and have brakes, driveshaft, etc and need to put the final tq on the rear axle nuts on new style IRS.
I did a search and found a lot of 250 ft lbs specs.
Ford's pdf shows 98 ft lbs and then 45*.
Will I be OK doing the 98 and 45*s?
I also read, some of the axle nuts are backing off after some mileage. Is that on the old T-Bird IRS only?

[edwardb]

The Factory Five instructions on their website for the newer IRS show 98 ft lbs and then 45°. My pretty new Gen 3 Coupe manual says the same thing. Ford Performance instructions on their website for their aftermarket CV axles say "Install the new spindle nuts with Blue thread locking compound. Torque Stage 1: 98 lb.ft (133 Nm). Torque Stage 2: 45°."

I think it's unanimous. Pretty sure the 250 ft lbs was the older T-Bird style. Yes there were a number of reports of the previous design loosening up. Haven't seen a single report for the newer design. Several thousand miles on my Anniversary Roadster with the newer IRS and no issues. I did check them once last year. They were still tight. I plan on making that check a part of my annual maintenance cycle. The Ford Performance quote is the first I've seen of using Loctite. I didn't on mine. Wouldn't hurt anything I guess.

[Railroad]

Thanks edwardb. I did run the nuts down, but lack putting the tq and 45* on them. Rather than pull them off, I will forego the loctite also.

[JRL16]

I purchased new axle nuts from ford for my 2015 IRS. The new design already has blue loctite on them and the specs are identical to what you've been told.

[Railroad]

Thanks JRL16. Mine may have had loctite on them. Old mind and too much time to recall. The stuff Ford uses is good. I backed a bell housing bolt out for a ground lug and run into driveshaft flange bolts, loctited from Ford. They are not coming loose.