An2ny

Jeff,

You mentioned something about the Supra differential: do you know if the Mk3 Supra rear diff 373 clutch type will fit in a IS250 Manual RWD?
Also when swapping to the IS300, is this a bolt on process? You just took it apart to inspect it and replace a few things correct?

Thanks!

Jeff Lange

iTrader: (1)

The Supra's internals will fit the IS250 Manual RWD, yes, the exterior is quite different however.

I didn't really take it apart, I pulled the cover to verify that it was a 3.91:1 Torsen and to reseal it. I put the entire thing in without modifying anything.

Jeff

An2ny

Jeff,

So to do the Supra MK3 LSD swap is just a matter of opening both cases and swapping the internals? Or is there a lot more involved?

Thanks- I will post pics of the process, I may be getting a rebuild kit depending on the condition of the diff.

Jeff Lange

iTrader: (1)

That is all that is involved, you may want to use new bearings and seals though.

Jeff

An2ny

Jeff- Thanks for researching/ trying and posting all this info!!!

“06-08 IS250 AWD models have a 190mm rear differential (A Torsen from an IS200/RS200 Altezza might work well in this application)
06-11 IS250 RWD & 09-11 IS250 AWD models have a 205mm rear differential (The IS300 Torsen is a bolt-in upgrade for this application)
06-11 IS350 and IS F models have a 208mm rear differential”

Another question- the 06-11 IS250 RWD and AWD have the same rear diff casing size regardless if they are manual or automatic correct?

Jeff Lange

iTrader: (1)

The 06-13 IS250 RWD all have the same diff case as the 09-13 IS250 AWD. The 06-08 IS250 AWD is smaller.

AT or MT doesn't make a difference to the case.

Jeff

2012IS250

can anyone tell me if this is a limited slip or not? I want to put this in my '12 IS 250. http://www.ebay.com/itm/LEXUS-IS300-M96-CARRIER-DIFFERENTIAL-41110-30861-2001-2002-2003-2004-2005-OEM-5/360612609778?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D18239%26meid%3D3147611027790599249%26pid%3D100005%26prg%3D8344%26rk%3D4%26rkt%3D5%26sd%3D261344400026%26 Thanks

Jeff Lange

iTrader: (1)

No it isn't, at least from the information provided. I can't do a visual inspection because they have the axle holes covered.

Jeff

Gville350

iTrader: (10)

At that price, it is very doubtful to be an LSD.

flowrider

iTrader: (9)

Googled the PN - Looks like it is NOT LSD:

http://my.is/forums/f115/is300-differential-425239/

http://lexus.dealerdirectparts.com/L...111030861-.htm

Lou

2012IS250

thanks I actually found another location where they were selling carrier assemblies, now I just gotta figure out if a locked carrier assembly is a fully locked one just like a welded diff or if it's a true LSD, if anyone knows, please help out as I may be purchasing one tomorrow. thanks again

JETLEX

iTrader: (11)

Questions:
1) when buying used lsd out of an IS300 , is there any parts that could wear out inside the diff diminishing its locking performance, like clutches etc?
2) would it be better to just pay the extra & get a carrier out of an FRS or BRZ?
3) Lastly, how do you check if the differential is lsd if the tag is missing or unreadable?
Thank you in advance!

Jeff Lange

iTrader: (1)

No, there are no wear items in a Torsen like there are in a clutch-type LSD. It's performance does not diminish over time. An FR-S would have lower mileage, which is nice for the ring and pinion, but only if you are interested in the 4.10:1 gear ratio. If there are no labels/tags, you'll need to do a visual inspection.

Check my other post for identifying whether it is an LSD or not by doing a visual inspection through the axle hole.

Jeff

FSportIS

iTrader: (13)

Pardon my noob question, What is the benefit of this mod?? Will this increase HP? Increase MPG? Better Aerodynamics? Lower unspung weight? Better handling? What is it??

JETLEX

iTrader: (11)

Thanks Jeff! I must have missed that one in my searches on here, but that is exactly the info I needed!


Google Limited Slip Differential, or see Jeff's other thread he linked to - answers all your questions & more:

https://www.clublexus.com/forums/is-...nto-is250.html