Fury diff

[mazie]

While starting to remove the rear end in order to change the diff from a 3.9 to a 3.6 I found it isn't possible to lower it out. Any advice to what method is easiest as it seems almost impossible in the fury with the body fitted.

[petercoll]

Live axle or IRS ?

Pete

[matt_gsxr]

If its IRS. I remember being told to rotate it around the axis of the axle, and then take it out the bottom.
I haven't yet tried it myself.

Wear scruffy clothes as diff oil stinks.

Matt

[mazie]

Hi all and cheers for the replys. It's a IRS fury. Just does not look like enough room to turn it on it's axis either, maybe imbed to get underneath it again, but it would seem like madness if u couldn't easily change the diff .

[adithorp]

I've had mine out a couple of times through the bottom with only striping out the shafts. Turned it rear end down and rotated 90' so the outputs were front/rear then lowered it out. It's a freelander diff though so smaller than the Sierra one.

adrian

[mazie]

great , thanks for the help. Ill give it a try on the weekend, it must be possible surely , otherwise its a design flaw! ha
. ive got all 16 wheel studs to change too before brandshatch!

[mazie]

Anyone gone from a 3.9 to a 3.62 and noticed much change?

[matt_gsxr]

"
Anyone gone from a 3.9 to a 3.62 and noticed much change?
"

Don't try to get out of it now! These sound like my kind of avoidance tactics.

I don't know what engine, gearbox and wheel size.
I seriously doubt you have a gsxr1100 on 14inch wheel with a 3.14 diff, so I won't know the answer, but someone might.

Matt

[mazie]

Avoidance tactics , yeah does sound a bit like not wanting to lay over the drive in the ice!
I have a 2.0 silvertop , 2.0 sierra type 9 on 15" road wheel and 13" track wheels so if anyone has an idea please let me know as I would rather not change it for he trackday ! Well not this year anyway.

[MattD]

Sounds very similar to my old spec, although mine is 3.89 live axle.

My standard spec 2ltr silvertop/type9 was really good on 3.89 with ATB LSD, if anything though more track use was sending me towards 4.1 or 4.44 diff ratio - ie faster acceleration, lower top end.
Never got anywhere near the 5th gear rev limit at places like Snetterton.

For my money a 3.62 turns it into a long geared motorway cruiser, higher top end, slower getting there, but also less revs at 70 in 5th.

Choices Choices for your intended main use - road or track ??

Either way, you're still way quicker than most normal cars

Matt