75 Series front drive engagement problem.

Post by **Drift Technician** » Tue Jun 30, 2009 9:41 pm

Hey guys.

My 75 has developed a weird issue whereas the fronts don't appear to lock into 4wd by locking the hubs and selecting 4WD. Seems if you sometimes turn the wheel to the side it starts to engage drive to the front though. It has put me into two situations in the last week which I don't wish to repeat.

Any ideas on what it might be?

Post by **Z()LTAN** » Tue Jun 30, 2009 11:53 pm

the Aisin manual locking hubs are at fault here.
They get sticky and sometimes only 1/2 engage, the angle of the wheel and the thrust loads produced are enough to make it engage temporarily when on that angle.

Pull them off, clean and regrease them. Re thread the hub gear back on the spring if it has come off.

Good luck

Post by **pinkfloyddsotm** » Wed Jul 01, 2009 9:27 am

yer mine do that aswell, they always have since i owned the truck, sometimes you might need to driveforward a little engage the 4wd stick or like you said turn the wheels

Post by **Drift Technician** » Wed Jul 01, 2009 9:43 am

Thanks guys.

Do they have a habit of springing out as well?

Post by **Z()LTAN** » Wed Jul 01, 2009 6:42 pm

what do you mean by springing out mate?

Post by **pinkfloyddsotm** » Wed Jul 01, 2009 9:00 pm

Drift Technician wrote:Thanks guys.

Do they have a habit of springing out as well?

my 4wd stick can pop out sometimes when i hit bumps at speed .

Post by **Drift Technician** » Thu Jul 02, 2009 9:25 am

Im positive they were locked in with my first mishap when I realised I had no drive to the front wheels. Was wondering if because they don't engage properly, if they are actually engaged like I'm sure they were, can they disengage as well?

Post by **trev1** » Thu Jul 02, 2009 12:08 pm

I've seen them rust up too, and also had them not engage after a repack due to there being too much grease in the hub not letting the gear engage and the spring not being strong enough to push the grease out of the way.

Post by **crazy60** » Thu Jul 02, 2009 1:47 pm

DO NOT FILL UP WITH GREASE - I have had this happen a few times - too much grease will cause this ?????

Post by **Drift Technician** » Mon Jul 06, 2009 5:43 pm

Righto so we pulled apart the hubs and it appeared that the passenger side one, the spring had fallen out of the hub gear.

A question I do have is I purchased a Longfield super set with hub gears and the hub gears I have received are totally different, they are smaller and have no cutout for the spring to fit into.

Seeing as its a 40 series set, does this mean that I need to change the hubs from the 40 over to the 75?????

Post by **trev1** » Mon Jul 06, 2009 7:47 pm

I didn't think there was any difference in the locking hub between the 40 and the 75. Make sure the gear isn't for the shonky AVM locking hubs.

Post by **Drift Technician** » Tue Jul 07, 2009 8:52 am

trev1 wrote:I didn't think there was any difference in the locking hub between the 40 and the 75. Make sure the gear isn't for the shonky AVM locking hubs.

How would I be able to tell this?

Apart from the fact it looks nothing like the hub gear in there and is smaller.......

Post by **MR SHIMANO** » Tue Jul 07, 2009 6:10 pm

just burn it dude and i'll give ya 50 for the longfeilds

Post by **Drift Technician** » Tue Jul 07, 2009 6:56 pm

MR SHIMANO wrote:just burn it dude and i'll give ya 50 for the longfeilds

Sold!

Actually, hang on, that would mean you would actually have to take your truck out and maybe get some scratches on it.

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75 Series front drive engagement problem.

75 Series front drive engagement problem.

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