AVM Locking wheel hubs

Had a chance to check on my Jimny again. I would like to post pictures for clarity but for some reason I'm having problems doing so. Hopefully you can follow Kayjay.

I should first mention that I wouldn't post pictures of most of my AVM hub measurement since they are identical to yours. That said, I measured (as well as I could) the dimension from the hub head mounting surface (on the hub) to the outer surface on the vacuum seal. It appears to be about 7mm. The dimension on the hub head that you show for the pocket depth from the lip is 12mm. The measurement from the lip to the mounting surface on the hub head is 4mm. Therefore from the mounting surface on the hub head to the surface in the recess that is making contact with something should be about 8mm. Even without a gasket, that should be a 1mm clearance. It should be slightly more with the gasket. Seems a little closer than I would design but it should work.

It would only take the hub nut (and vacuum seal) sitting a little proud for it to make contact with the hub head in the location you indicate. If anyone would like to double check my measurements (it was a little awkward) I would welcome the sanity check.

did not get the time yesterday to check my SJ hubs as had to stay late at work and had guests coming around for dinner yesterday.
I'll try again tonight

I’m following this thread as manual locking hubs are on my shopping list. Is there any identifying marks/ part numbers on the actual avm hub? Avm 438 does the earlier Jimny model and the older SJ. Is it possible you have been supplied with the wrong Jimny locker?
Pic taken from avm’s web site.



Sent from my iPhone using Tapatalk

No there are no identifying marks/ part numbers on the actual avm hub, aside from the 'Made in Brazil' stamp. This is a great, great pity. AVM's website is little use either. Maybe I wouldn't be having all this trouble in working out the problem

Although it does confirm the correct model for my 2006 Jimny is th 457

After all the posts this week (thank you all) I decided to do some more accurate measurements. I think this shows exactly why the hub is binding solid when the bolts are tightened.

Here is the existing car side showing the inner dia (D) of 60mm and that it protrudes (C) 8.67mm from the flange.


The photos below show the AVM side that must fit onto the above. Dimension (A) 57.45mm is narrower than (D) by 2.55mm. Given that dimension (b) is 7.44mm and dimension (C) is 8.67mm, some 1.23mm longer, its obvious that the binding will occur in the area indicated.



As a test I used 1.25mm washers to space out the two parts and no binding occurs. If others agree that their Jimny hub dimensions (C and D) are as mine then my AVM hubs would not fit them either. If so then there must be errors in the manufacturing of my AVM457 hubs and I should return them.

Also I cannot see how the locking collars are ever going to work given that they break up when tightened.

kayjay wrote:
Also I cannot see how the locking collars are ever going to work given that they break up when tightened.

They can't work, as those hubs have straight holes.
The conical washers are to fill up the conical holes that you haven't got. The head of the bolt stops on the flange, and the cone washer compresses into the hole, closing up the split in the washer .

No! my AVM457 hubs have conical holes. At around 20ft/lb they start to break. See earlier photo. Other contributors have reported conical and others report straight holes and standard lock washers. It seems the design has changed at some point

Just for info that might help you if you’ve not already worked it out. I just fitted a set of avm 457hp hubs to my car, when the selector is off the free hub it looks like the model number is in the casting



Sent from my iPhone using Tapatalk

Strange I don't recall seeing that on my hubs. In any case I had to send them back for refund. Even if they fitted correctly the locking collets were a big issue. How did yours take 35ft/lb torque?. I got a set of TREX hubs, better made and cheaper but did have to get my own bolts as they seem to believe that I should use the original ones but they are way to long. Only fitted them yesterday and was going to update this thread

Yeah I had read 48nm for the bolts too. I didn’t have a torque wrench that goes low enough so I have done them tight and I’ll check them next time I’m over at my friends. 48 on those little cone washer things gives me the fear.

Anyway glad you got yours sorted, and I’m looking forward to hear how yours perform. Tyre x hubs were on my short list but I think I found a good deal on my reinforced avm hubs. Hopefully it works out for both of us


Sent from my iPhone using Tapatalk

Yes will do. I linked out the vacuum switch so that the green light stops flashing and the ABS knows that 4WD is selected.