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diff not locking up 

 

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 Post subject: diff not locking up
Posted: Sun Jan 03, 2010 12:09 am 
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hey i have a ef xr6 manual diff is not locking up out of corners but will lock up in a straight line
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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 12:27 am 
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Get the diff hot, then change the oil. Make sure you put LSD oil in it.

 

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 10:52 am 
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LSD's are not designed to Lock up. They limit slip on one wheel, by allowing the other to spin aswell. What you have is a classic case of a dying LSD.

 

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 2:36 pm 
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crosby611 wrote:
hey i have a ef xr6 manual diff is not locking up out of corners but will lock up in a straight line


you'll have alot of ppl telling you it's dead but i thought that when i bought a second hand ED XR diff from the wreckers. but i fixed it.

all i did was drain the diff oil and then just put some LS90 in it for about 2 weeks of normal driving, then changed it again and put Castrol XFA something something (can't remember the rest) proper Ford factory V8 LSD oil in it when i did axle seals and wheel bearing. works a treat. beware it is $35 a litre!

 

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 5:05 pm 
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You don't need to use the Castrol SF-XA......Castrol LSX90 will do just fine.

 

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 8:13 pm 
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cjh wrote:
You don't need to use the Castrol SF-XA......Castrol LSX90 will do just fine.


tried it. kept spinning leggers

 

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Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 8:41 pm 
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WILDEB wrote:
cjh wrote:
You don't need to use the Castrol SF-XA......Castrol LSX90 will do just fine.


tried it. kept spinning leggers


Then it needs a rebuild.....there's a mob called "Street & Strip Gears" that sell new 28 spline, 4 pinion LSD centre for about $600, including freight.
I have one in my ED right now.....I changed to a higher grade of fasteners to hold the centre together though.

 

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 8:43 pm 
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cjh wrote:
WILDEB wrote:
cjh wrote:
You don't need to use the Castrol SF-XA......Castrol LSX90 will do just fine.


tried it. kept spinning leggers


Then it needs a rebuild.....there's a mob called "Street & Strip Gears" that sell new 28 spline, 4 pinion LSD centre for about $600, including freight.
I have one in my ED right now.....I changed to a higher grade of fasteners to hold the centre together though.


no i don't. oil choice can change everything. like i said. that castrol XFA stuff works awesome

 

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Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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 Post subject: Re: diff not locking up
Posted: Sun Jan 03, 2010 8:50 pm 
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WILDEB wrote:

no i don't. oil choice can change everything. like i said. that castrol XFA stuff works awesome


I changed the oil in a mates AU XR8, to that Castrol SF-XA, and the diff started making noises 3 weeks later.....and he doesn't drive hard...he's a grandma at driving.
I rebuilt the diff, and used LSX90 in it, and had no more probs with it after that.
The SF-XA seems thinner straight out of the bottle than LSX90, I noticed.
I use Penrite Limslip 140.

 

 

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 Post subject: Re: diff not locking up
Posted: Mon Jan 04, 2010 1:23 am 
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cjh wrote:
WILDEB wrote:

no i don't. oil choice can change everything. like i said. that castrol XFA stuff works awesome


I changed the oil in a mates AU XR8, to that Castrol SF-XA, and the diff started making noises 3 weeks later.....and he doesn't drive hard...he's a grandma at driving.
I rebuilt the diff, and used LSX90 in it, and had no more probs with it after that.
The SF-XA seems thinner straight out of the bottle than LSX90, I noticed.
I use Penrite Limslip 140.


Ford use Castrol factory. and it's 80w140

 

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Daily driver: AU2. 5 speed. 19" FG luxos. Full exhaust. Lowered. AU3 XR leather interior, converted to full power windows. 3.45 LSD. IN THE FUTURE: Tickford 6
Weekend driver: EA SVO AU motor. Built BTR. TCE 2800 stall. T76 turbo. Locked diff. On E85. approx 320rwkw. 11.5 @121mph

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 Post subject: Re: diff not locking up
Posted: Mon Jan 04, 2010 8:29 am 
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as 67rce said its a lsd (limited slip) not a lock diff, so there will be the odd occasions where it may not spin both wheels..
the thing is some oils are better than others, i use penrite 10 tenths hd gear oil and it works a treat..
but even with castrol lsx the lsd should work as its meant to..
so if the diff is showing signs of loose/lazy lsd? its tired and ready for a reco..
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 Post subject: Re: diff not locking up
Posted: Mon Jan 04, 2010 4:36 pm 
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Ford recommend 90 weight for the 3.23 and 85/140 for the 3.45.
Unless you do burnouts you wont need 85/140, too heavy for everyday driving and will increase fuel consumption slightly.
I use lsx90 in my 3.45 lsd and it is fine, of course the diff was already in good nick.
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