LexBrett

Hi All-
Another member pointed out that there is a 3.76 differential on ebay for $250 shipped.
Isn't the 3.76 gear ratio optimal for low end torque?
Is it correct that this later model sc had the 3.76 gear ratio, and earlier models did not?
I'm not even going to entertain the idea of DIY.

Just curious about your thoughts on this?

http://www.ebay.com/itm/06-09-lexus-sc430-rear-drive-axle-differential-carrier-only-21k-miles-/201144727384?fits=Make%3ALexus%7CModel%3ASC430&hash=item2ed528f758&vxp=mtr

bacardi11

iTrader: (1)

all 6 speeds come with the 3.76 rear.

LexBrett

That is the same gear ratio for the supra Mk4? Would my 2002 be compatible? Don't tempt me. Fiance would lose it

bacardi11

iTrader: (1)

that right that's why I told you. same gear but not the Supra rear.

LexBrett

I guess Greg did the supra mk4 because he wanted the LSD?

bacardi11

iTrader: (1)

yes he did.

SlvBullet

iTrader: (8)

Brett - a LSD is vital for better performance around curves - of course more important at speeds much higher than legal ... The science and different designs are actually very interesting if you want to read about it. Of course to go with the LSD, I am changing to summer max performance tires so the tire traction will match the rotational speed advantage from the LSD.

LexBrett

What do you think about this one for my purposes? Do you know if it is a direct fit for sure? Is the DIY really doable?

bacardi11

iTrader: (1)

lex
if its the one I talk to you about its a direct bolt in change nothing not a bad deal for a rear end for the money 250 shipped. 3.76 gears.

LexBrett

Very very tempted. Maybe I could hide it on my basement for when I have some free time. Then study Greg's DIY. I think the biggest problem with our cars is the conservative gearing..

bacardi11

iTrader: (1)

lex
I told you why I didn't get it. I am just to old for this stuff. put it in the basement till you do the install.. 250 shipped to you.

Ghump

I have a 2002 Sc430 and have been considering a swap to a 3.769 differential, but it looks like the axels attach differently to the 3.769 differential (from looking at pics and parts diagrams). Would a 2006 + differential work on a 2002?

LexBrett

The consensus on CL is that the 2006 will fit 2002. I sure hope so. Here are the schematics from the 2002 (top) and 2006 (bottom). Hopefully Greg and Gene will chime in:

Ghump

Thanks for the reply. I looked at the same diagrams while researching. Notice the 8 bolts on parts # 41105 for the 02. The 06 doesn't have that same attachment. The 41105 is called a retainer on the diagram, but the 06 doesn't have it??

LexBrett

Yeah that is really strange. On the '06 diagram nothing attaches.