Excessive Diff Slipping

[Goobz]

Since the heaven's opened up and blessed us with a few hundred extra horepower(rain) tonight, a few friends and I went out to do some spirited driving on our private road.

One thing that kept annoying the out of me was that I reckon about 75% percent of the time when I booted it, it would just bag up one wheel.

Is this normal or is there something wrong with my diff?

If so do you reckon it would be warranty? Would a unichip and transmod compromise this?

How much does it cost to rebuild a diff otherwise?

Oh and its a ute...

Thanks

Chris

[BRI BRI's XR]

It's normal for one wheel to spin if your driving on uneven surfaces, you will find if one wheel is on the tar and the other in the dirt that one will always spin. Remember it's a limited slip not a lock up diff.

You will find that if you put the ute on level tar with an even surface both wheels will spin. If your diff isn't making any noises it's probably ok.

[Lawsy]

Actually, I'd get it checked out anyway... Last I heard these diffs were meant to limit the torque to either wheel to above a 30/70 ratio. So either wheel must have at least 30% of the torque (or something like that). So if one is spinning in the wet and not the other, this means only like 10% of the torque has actually made it to one of the wheels... that's just not enough.

If I can get both wheels to spin in a 182kw Ghia with an open diff in the wet, then with even just 10/90 split should get both to light up in a turbo.

My point is, if just 30% torque to one of the wheels is enough to get them to both light up in the dry, then a crap load less torque should get them both to light up in the wet. So no, I don't think everything is right here.

Get it checked by someone other than ford, obviously.... Then change diff oils to whatever mal wood recommend. Apparently they have changed oils in quite a few diffs and this solved many different, seemingly unrelated problems....

[69ADY]

Hi goobz, the fact that your limo isn't bagging both wheels indicates that something more than likely is amiss. It sounds like the clutches in the diff hemisphere are worn out and need to be replaced, and it could be from the power of your mods. Either way, I would get it to ford as soon as convenient, and not put the foot down to often till the guys check it out thoroughly.

Adrian

[God666]

I have exactly the opposite problem (well, not really a problem). My diff seems very difficult to unlock in that when you go around a sharp corner, you can hear the tyres scuffing and the diff protesting. Even very mild driving in the wet, if one tyre loses traction, the whole arse end of the car goes around as it forces the other wheel to lose traction. It is a shocker to drive in the wet constantly losing the rear around even mild corners.

However, I am not going to get it looked at as I am now used to it and it is more fun...

[YOOT]

My diff is the same as yours Goobz - its rooted, I can spin one wheel in the dry going around a corner, but in the straight its a bit of both, sometimes it locks up and sometimes it doesn't. Probably doesn't help having 400HP going through it.

I think it costs around $1200 to have a diff fully rebuilt, that includes lapping out the clunk and repacking the clutches so the diff is much closer to 60/40 power split. Very tight!

[Trough Lolly]

goobz try an oil change see if that helps, the T's need frequent diff oil changes.

[Goobz]

  Trough Lolly said:

goobz try an oil change see if that helps, the T's need frequent diff oil changes.

<{POST_SNAPBACK}>

Yeah I might give the oil change a try.

What oil am I supposed to use? Isn't there some additive aswell?

I don't think the unichip would be a problem as I only have 200rwkw. There are stock manuals with more than that at the treads. Not to mention the tornado's...

Think I'll just remove the transmod before it goes back. Doesn't take long...

Thanks

Chris

[Aeron]

That wasn't you that just about lost it behing Greystanes Shops was it. I looked out the window at work and there was a Blueprint BA XR coming sideways round the corner, hit 2nd gear and it flicked back theother way and almost took off up the gutter. Was fun to watch.

[Goobz]

  Aeron said:

That wasn't you that just about lost it behing Greystanes Shops was it. I looked out the window at work and there was a Blueprint BA XR coming sideways round the corner, hit 2nd gear and it flicked back theother way and almost took off up the gutter. Was fun to watch.

<{POST_SNAPBACK}>

Nah wasn't me. We head out around the shire mostly if its just for a drift. Unless we have a few cars then we go for a nice long cruise somewhere. Anyone from sydney( or anywhere for that matter) who hasn't been for a late night spirited run through Minamurra rainforest and Maquarie Pass hasn't been for a real cruise yet! That road rocks!!!

Would have been good to watch though!!!

Chris