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Diff shaving question.
Posted: Sat Nov 27, 2004 11:25 pm
by ausyota
Soon I will be doing my SAS and will be shaving the diffs to get a little more clearance and a smooth bottom to slide over stuff.
Like this -
Well my question is - At the same time as doing this I will be installing a new crownwheel and pinion and air locker. I know that when fitting new diff gears they should be runn in and then the oil drained and replaced to get rid of metal filings and the like.
With a shaved diff and no drain plug I will be draining oil from the lower 2 stud holes and 1 I wont be able to drain ALL of the oil out and 2 I wont have a magnetic drain plug to suck the metal on to.
So should I run the diff in and then pull the diff and shave it or should I just hoe into it now while its out and not worry?
I have heard of people glueing a magnet into the diff to catch metal bits but Im not sure that is a good idea, if the magnet broke loose and went into the gears it could get painfull.
Paul.
Posted: Sun Nov 28, 2004 12:50 am
by duncan
Why not weld a drain plug in the bottom with the magnet on then grind the top of smooth how much do you realy save .Do no were there is a zuk only 1 liter unlicenced but guy only wants $850 for it .Tipical i bought mine last week and this week there was a long wheel base for sale in Rockingham real cheap
Posted: Sun Nov 28, 2004 5:21 am
by BundyRumandCoke
See if you can get a recessed plug. That is, you need a square key, like a 1/2 inch rachet, to remove the plug. This would sit flush with the diff surface.
Posted: Sun Nov 28, 2004 9:03 am
by ausyota
duncan wrote:how much do you realy save .
Around 1 inch (equivelent of 2 inch tyre diameter increase) and you get a smooth bottom that slides over stuff and a bash plate over the crownwheel part of the diff.
Paul.
Posted: Sun Nov 28, 2004 9:49 am
by Begbie
Tap and die set and use almost any counter sunk/flat toped bolt or screw - it wont matter if the drain hole is only 7/16 or somthing...just take ages to drain.
Posted: Sun Nov 28, 2004 5:14 pm
by GearMan
shave it bolt diff in and go skip the magnet
Posted: Sun Nov 28, 2004 5:20 pm
by -Richo-
what about the diffs you see on army trucks and the like, that are raised up (you cant even see it its just flat) nothing like that available for the general public? i havent see any on any fourbies...
Posted: Sun Nov 28, 2004 7:31 pm
by Shadow
Drop Bear wrote:what about the diffs you see on army trucks and the like, that are raised up (you cant even see it its just flat) nothing like that available for the general public? i havent see any on any fourbies...
do you mean indipendant or solid axle
if solid axle you could just get a highpinion diff with alot of protection/strengthening of the housing and it could be as flat on the bottom as you want it to be, it would be almost impossible to have the axle shafts coming out much lower than in a high pinion diff.
Posted: Sun Nov 28, 2004 8:30 pm
by big red
weld a steel tube inside that reaches the bottom of the diff housing and goes to a plug at the top of the housing.
then just pressureise the housing to a couple of psi and it should force all the oil out
if the seals leak then create a vaccuum on the steel tube to suck the oil out but leave the oil filler plug out while you do it.
Posted: Sun Nov 28, 2004 9:10 pm
by ausyota
Shadow wrote: solid axle you could just get a highpinion diff with alot of protection/strengthening of the housing and it could be as flat on the bottom as you want it to be,
I dont exactly follow you
I allready have a High pinion centre to go into the Hilux front diff but that doesnt mean that I can shave more off the bottom of the diff. The crownwheel is still in the the same spot just the pinion is higher.
And big red your a thinker
Paul.
Posted: Sun Nov 28, 2004 9:54 pm
by Shadow
ausyota wrote:Shadow wrote: solid axle you could just get a highpinion diff with alot of protection/strengthening of the housing and it could be as flat on the bottom as you want it to be,
I dont exactly follow you
I allready have a High pinion centre to go into the Hilux front diff but that doesnt mean that I can shave more off the bottom of the diff. The crownwheel is still in the the same spot just the pinion is higher.
And big red your a thinker
Paul.
sorry i was trying to explain drop bears comment about army trucks
Posted: Sun Nov 28, 2004 10:03 pm
by daddylonglegs
[quote="Drop Bear"]what about the diffs you see on army trucks and the like, that are raised up (you cant even see it its just flat) nothing like that available for the general public? i havent see any on any fourbies...[/quote]
I assume the army trucks you are refering to are Mercedes Unimogs which have Portal step down reduction hubs thet raise the diff centre about 6 inches higher. and yes portal hubs are available to the general public if you have a Land/RangeRover .
Bill.
Posted: Mon Nov 29, 2004 7:21 am
by -Richo-
yeah i have seen out on the road now and then the army trucks, it looks as if where the axle meets the hub its angled down to give more clearance and there is no sign of the diff sticking down in the middle, gives a heap of clearance, i have always thought that would be lovely on a fourby (probably expensive too). Dunno if you get what i mean from that explanation but next time you see and army truck have a look.
Posted: Mon Nov 29, 2004 3:50 pm
by spazbot
yeah they is called portal axles , very common on the big army trucks (unimogs) yes they have been fitted to fourbys, look at say the mog rover or ballsacks or glen dobbins trucks, they all have portal axles of some sort on them
Posted: Mon Nov 29, 2004 5:25 pm
by 4sum4
"ausyota" Put it in the rear till its run in Heaps easier and quicker to fit and you don`t have to drive around in 4wd
Posted: Mon Nov 29, 2004 7:57 pm
by J Top
"I already have a high pinion front "
No good putting that in the back to run it in , it will be driving on the wrong side.
J Top
Posted: Mon Nov 29, 2004 8:14 pm
by +dj_hansen+
ausyota wrote:I allready have a High pinion centre to go into the Hilux front diff
Posted: Mon Nov 29, 2004 9:59 pm
by hypo
duncan wrote:Why not weld a drain plug in the bottom with the magnet on then grind the top of smooth how much do you realy save .Do no were there is a zuk only 1 liter unlicenced but guy only wants $850 for it .Tipical i bought mine last week and this week there was a long wheel base for sale in Rockingham real cheap
i got 30mm out of the GQ front under my luxy last friday..
P.S thnax Sam @ OVERKILL 4 the help........