Auto hubs locking in when in 2 wheel drive

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Originally Posted by YNOT

Just a quick forum tip for you Nobby, when you're replying to multiple posts as you did above, click on "reply with quote" (like I did here) so people can see which post you are replying to, your replies will make more sense that way.

Tony

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Thanks for that.

Ignore this one, info applies to some transfer cases, not diffs. Silver

The manuals say that certain models need Dexron II (or is it III) in the front diff. There is a view that is because the thinner oil stops the auto hubs engaging by themselves. The Dexron is the Jap Dexron. However it is difficult to see how this would occur

I have been asking around town about my problem with the hubs locking up in 2 wheel drive.
could uneven tyres cause this?
I needed two new tyres for rego and put them on the rear of car. (usually put them on the front)
tyres on the same axle are same wear.
could this have an effect??

Nah... shouldn't be the tyres esp if they have the same wear.

If tyre dia caused it then the hubs would lock evry time any vehicle went round a corner

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Originally Posted by the evil twin

Nah... shouldn't be the tyres esp if they have the same wear.

If tyre dia caused it then the hubs would lock evry time any vehicle went round a corner

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ta!! that makes sense.

Quote:

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Originally Posted by YNOT

Just a quick forum tip for you Nobby, when you're replying to multiple posts as you did above, click on "reply with quote" (like I did here) so people can see which post you are replying to, your replies will make more sense that way.

Tony

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Hey Tony

Could it be a similar problem to the ones I swapped out with you?? Assembled incorrectly after the repack of the bearings? Of the spring in one of the auto hubs (either side) has clapped out??

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Originally Posted by Bigrig

Hey Tony

Could it be a similar problem to the ones I swapped out with you?? Assembled incorrectly after the repack of the bearings? Of the spring in one of the auto hubs (either side) has clapped out??

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Yes it could be.

Tony

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Originally Posted by Silver

The manuals say that certain models need Dexron II (or is it III) in the front diff - and that is because the thinner oil stops the auto hubs engaging by themselves. The Dexron is the Jap Dexron.

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The hubs and CV's are lubricated by grease, the diff oil is kept out of the hubs by a seal in the ends of the axle tubes. If there is diff oil in the hubs then the seal is leaking and needs to be replaced.

Tony

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Originally Posted by YNOT

The hubs and CV's are lubricated by grease, the diff oil is kept out of the hubs by a seal in the ends of the axle tubes. If there is diff oil in the hubs then the seal is leaking and needs to be replaced.

Tony

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Agree 100% but is was an explanation I came across for why some models of GQ diff need dexron - which being auto fluid is 'thinner'. I don't understand it either :-(

The explanation was that the thicker diff oil got things turning in the diff - but I agree it doesn't make sense. If the transfer case isn't sending grunt to the front, the diff just does its own happy thing......

Happily mine is not that kind of diff so once I worked that out I didn't take it any further.

I'll go back and edit my post :-)

aha!!! found the source of my inaccuracy. The dexron is recommended for some transfer cases - and I can see the explanation making sense there. Got my wires crossed, apologies all.