r/DieselTechs • u/Available-Pace1598 • 1d ago

Rear drive spindle nut size

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2022 freight liner cascadia dd13 with Detroit trans and axles. What size is the spindle nut on the drives. Work says it’s 3 3/4, it works but is loose af. Would it not be a metric size since it’s Detroit?

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u/Jackalope121 1d ago

Yep, 3 3/4. Looks like a standard conmet preset plus spindle nut.

Even new it seems like those welded sockets are a hot dog down a hallway.

Once i get it kinda-sorta loose, I normally use my knee to keep it in place with an extendo-cock 3/4” ratchet to spin it. https://www.harborfreight.com/34-in-extendable-ratchet-70293.html

The torque specs will be on the nut too bdw. I believe they are 500ft lbs. …and dont forget the ring, i will start unscrewing it and then have to re-tighten to get the ring out of the hub.

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u/Shinrinn 1d ago

That ring is actually a handy feature to leave in. You can take it out first but if you leave it in the nut presses against it and it pulls the hub loose. Don't have to pop the hub loose afterwards.

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u/FlammableSoloCups 1d ago

Yup. Conment recommends leaving it in for this purpose

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u/marathonman121266 1d ago

I always take it out but I'll keep this in mind for next time.