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Diff studs>>> help needed

General Tech Talk

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Diff studs>>> help needed

Post by eliteforce32 »

how do u take out or do i just drill and retap tap a broken stud on the diff housing for the diff center? i can tap etc but is it best get someone to do it?
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Post by Ingenious-Eng »

Not much info to go on???
But if it's a stud (has a nut screw onto it) you use a drift punch to gently knock it back inside the housing (with the diff centre removed of course) then pull a new stud through with a new nut & some flat washers between used as spacers.
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Post by eliteforce32 »

would u have a drift punch? or where can i get one?
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Post by ausyota »

You might be able to get it out with an EZ out (screw extractor).
You have to be really carefull though because if you snap an ezyout off you will in all sorts of trouble because they are hardened they hard to get out :)
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Post by toughnut »

Yeah. Easy out would be the go. You drill the stud and the easy out screws the opposite direction and bites into the stud and unscrews it. They look like a tapping tool for tapping threads. If you stuff it up then just drill it out and use halicoils(spelling). You drill the hole just oversize, tap the hole and then just screw the halicoil into the hole. They look like a small coil spring and are way stronger than the original hole. Performance engine builders sometimes use these on engines to strengthen bearing caps on crank rods and stuff. ;)
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Post by eliteforce32 »

thanks guys, just hit something rather hard this arvo in the lux, leakin oil real bad, went to have a look and no nuts on the very bottom and one to the left of the diff :x thank christ it wasn't something else
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Post by Ingenious-Eng »

Some diff housings use studs similer to wheel studs that pull in from behind and others have tapped threads into the housing in which studs are screwed into???
Method of repair is totally different for either!!!!

Also helps heaps to look before asking? (good to hear problem solved)
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Post by 80UTE »

Being a hilux there screw in studs, pull the diff centre out and if there's some stud sticking belt a nut over it weld the nut to whats left of the stud and unscrew it. If is broken off flush i would say you will need to drill and retap as the studs are a tight fit in the housing (tread is oversize so as to lock into housing and seal) and you have a good chance of the ezyout breaking then you have that to deal with.

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