MDN_EF_5.0L

I have a 1988 Fairmount Ghia (Sedan) I have blow up my diff
I have a LSD Factory fitted diff do I have to put a LSD diff back in if I don’t have can I put a non LSD diff (from a 1988 Falcon )in if I do what will the different be in the way the car drives

dragonV8

It will fit no prob's. In the wet you will notice the difference as it will be easier to loose traction.
2nd hand diff's don't cost much,around $100. Just keep looking for a LSD.

3Toed

Not only in the wet! My next car will definitely have LSD (and ABS).

Get another LSD if you can.

Xyphoid

Hehehehehe !!!!
One thing to remember though,
when you do loose it (Wet moreso than dry) with LSD, YOU LOOSE IT BIG TIME !!!!!

At least without LSD, you only spin 1 tyre, and the car is somewhat stable. (I.E. no forward motion, no rear end trying to overtake the front).
With LSD, when you loose traction, the back wants to overtake the front and step out, which is very very fun when you have some control, but very scary when you are least expecting it.:oo1:

If you are going for a diff off a different model, (I.E. wreckers) then just be sure that the ratio is the same, otherwise your speedo will be out of calibration.

I think with EA Multi Point Injection 3.9 Auto (I am assuming this), the fitted ratio is 3.08, so you will need to get the same ratio as this in order to have the same speedo readings.
The Ratio should be on a metal tag on the diff.

Just a little note.
A higher Diff ratio (E.G. 3.23 or 3.45) will yeild better acceleration, in place of a higher top speed, (Auto gears will change earlier as well) A higher ratio tends to use more fuel on Highway cruises, as the engine is reving higher for a given speed.

A Lower Diff Ratio means that acceleration is poor, but the car is capable (If the engine is powerful enuf) of a higher top speed.
A lower ratio tends to be less thirsty on the fuel, due to lower Engine RPM needed for Highway cruising.

Hope this helps
Cheers
Matt

MDN_EF_5.0L

thank for your help matt I find a sec/hand Lsd diff for $200
so I just put in the same diff that was in it

Martin

If its a 3speed it will have 2.73 and if its a 4speed then it will have 3.23 diff ratio.

And if its one of the rare EA Ghias with the 5speed it will have 2.92.

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tickford2001

definately get another LSD.

As xyphoid said, it sure is easier to loose it in the wet with LSD, especially on off camber roundabouts! As long as you are used to driving with LSD you should be able to feel what the car wants to do and you will know when it wants to step out. Simply apply the right amount of opposite lock and enjoy the ride! Thats only on the track of course...!

Enjoy

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