SYE yoke bolt torque

MountaineerTom · Mar 17, 2023

So what’s the torque on the bolts for mating the transfer case end of the driveshaft to a SYE yoke? I can’t seem to find it anywhere.

Andy-WhiteTJ · Mar 17, 2023

According to the FSM for a front drive shaft:

(6) Tighten the U-joint strap/clamp bolts at the axle yoke to 19 N·m (14 ft. lbs.) torque.

(7) Tighten the universal joint to transfer case bolts to 27 N·m (20 ft. lbs.) torque.

(8) Lower the vehicle.

I would assume the same for a SYE.

Edited: for clarity

MountaineerTom · Mar 17, 2023

I read in the FSM that the Rubicon flange bolts are 85 ft lbs. seems like a big difference.

The bolts for the driveshaft are 5/16-24

Maybe I just need to call Tom Wood’s Driveshaft and ask them.

machoheadgames · Mar 17, 2023

Snug with a ratchet wrench and red loctite has always been the go-to for me. Completely different type of bolts than the Rubicon flange, so you can't use that as a reference.

The front driveshaft might work decently as a reference but getting a torque wrench on there will be interesting.

mudmaster · Mar 17, 2023

See attached standard torque table

tworley · Mar 17, 2023

I've always snugged them up with blue loctite or a lockwasher.

MountaineerTom · Mar 17, 2023

Andy-WhiteTJ said:
According to the FSM for a front drive shaft:

(6) Tighten the U-joint strap/clamp bolts at the axle yoke to 19 N·m (14 ft. lbs.) torque.

(7) Tighten the universal joint to transfer case bolts to 27 N·m (20 ft. lbs.) torque.

(8) Lower the vehicle.

I would assume the same for a SYE.

Edited: for clarity

machoheadgames said:
Snug with a ratchet wrench and red loctite has always been the go-to for me. Completely different type of bolts than the Rubicon flange, so you can't use that as a reference.

I just spoke with Troy, at Tom Wood’s, and he agreed that the same torque for the front drive shaft (20 ft lbs) and some loctite should be used for the SYE end for the rear.

I thought 85 ft lbs (for the Rubicon rear flat flange) seemed high and he explained that it used a larger bolt, which I wasn’t aware of.

Thanks for the help.

MountaineerTom · Mar 17, 2023

mudmaster said:
See attached standard torque table

That’s great, I’ve been wanting something like that. I’m going to print it out to keep in my shop. Thank you.

MountaineerTom · Mar 17, 2023

tworley said:
I've always snugged them up with blue loctite or a lockwasher.

Yes, I have some blue loctite and just snugged them down. Thank you.

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SYE yoke bolt torque

MountaineerTom

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Andy-WhiteTJ

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MountaineerTom

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MountaineerTom

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MountaineerTom

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