Fitting Hubs

**d2dave** · 1st May 2023, 08:29 PM

Putting new rear axles in the D2.

I was going to grease the splines to stop them seizing, but decided to check RAVE to see what is suggested.

It says to put a 3mm bead of 640 Locktite around the start of the spline which will then push the Locktite along the spline when fitting hub.

Anyone know the reason for this? I can only see 2 reasons. 1/ to prevent oil leaking down the spline. 2/ To prevent spline wear from a minute bit of back lash on the spline,
due to it being a push fit, not a press fit.

Anyone not used Locktite doing this, or used something else?

**Bohica** · 2nd May 2023, 10:50 AM

There is better stuff than Loctite to prevent oil leaking. With 490Nm of torque on the drive shaft nut I can't see any slippage. Still I bought the Loctite to do my rear hub.

**d2dave** · 2nd May 2023, 05:44 PM

Originally Posted by Bohica

There is better stuff than Loctite to prevent oil leaking. With 490Nm of torque on the drive shaft nut I can't see any slippage. Still I bought the Loctite to do my rear hub.

So you reckon that RAVE's reason is purely for stopping oil leaking down spline?

**shack** · 2nd May 2023, 06:30 PM

Originally Posted by d2dave

So you reckon that RAVE's reason is purely for stopping oil leaking down spline?

No it's not, allegedly it's to stop drive-line clicking.

It will also stop the splines fretting.

**rick130** · 2nd May 2023, 08:01 PM

Originally Posted by shack

No it's not, allegedly it's to stop drive-line clicking.

It will also stop the splines fretting.

It'll be this ^ to stop fretting corrosion.
The same reason you either grease the splines every 10-20,000km on the Tdi through Tdci Deefers or run oil lubed hubs.

**d2dave** · 2nd May 2023, 08:16 PM

So what do you suggest I use on my D2?

I shopped around this morning and the only Locktite 640 I could get was a 250 Ml bottle for a bit over $400.

I have a 50 mm bottle coming from OS but this will not arrive until mid June.

Would it be ok to just use grease and then when I get the Locktite I remove clean and apply?

**shack** · 2nd May 2023, 08:21 PM

Originally Posted by d2dave

So what do you suggest I use on my D2?

I shopped around this morning and the only Locktite 640 I could get was a 250 Ml bottle for a bit over $400.

I have a 50 mm bottle coming from OS but this will not arrive until mid June.

Would it be ok to just use grease and then when I get the Locktite I remove clean and apply?

I think you actually need 648.

It's available in Victoria, $22 for 50ml.

Should have it in a week

**Bohica** · 2nd May 2023, 08:28 PM

Originally Posted by d2dave

So you reckon that RAVE's reason is purely for stopping oil leaking down spline?

Looking at the shape of the drive shaft where it meets the hub, nice flat surfaces with all that torque holding it together, it will be oil proof.

**d2dave** · 2nd May 2023, 09:52 PM

Originally Posted by shack

I think you actually need 648.

It's available in Victoria, $22 for 50ml.

Should have it in a week

RAVE says 640. Had a look at 648 specs. It is very similar to 640 with one problem. It cures in 3 minutes, where as 640 has hours.

Rave says that the hub nut has to be tensioned before it cures.

Locktite.jpg

**simonmelb** · 3rd May 2023, 03:11 AM

I followed this advice and did not use any Loctite. Just a slight slight smear of anti sieze or grease.

Hub nut - why is it so tight?

Im pretty sure JC follows this practice as well. Will update if I can find the post.

I have replaced both rear hubs, tightened the hub it to spec and staked it. No problems in thousand of km.

Originally Posted by d2dave

RAVE says 640. Had a look at 648 specs. It is very similar to 640 with one problem. It cures in 3 minutes, where as 640 has hours.

Originally Posted by d2dave

Rave says that the hub nut has to be tensioned before it cures.

Locktite.jpg

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