IS300 M85/M98 rear diff - does it fit? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

PantsDants · 08-13-2013, 08:10 PM

Just got off the phone with Ishii Motor Industries. They're building a stockpile of IS300 differentials just for the purpose of swapping final gears out for our cars.

GTB/ZR-1 · 08-13-2013, 10:20 PM

Quote:

Originally Posted by Jeff Lange

Not all IS300's have LSD, so you'll want to make sure before buying one unless all you want is the ring and pinion.

Good point...

I wonder if there's a way to tell gear & LSD. Some are for sale on the 'ol eBay--but some of theses sellers are clueless as to what's inside the pumpkin lol.

PantsDants · 08-14-2013, 01:22 AM

Quote:

Originally Posted by GTB/ZR-1

Good point...

I wonder if there's a way to tell gear & LSD. Some are for sale on the 'ol eBay--but some of theses sellers are clueless as to what's inside the pumpkin lol.

You're taking a gamble, but if the carrier still has the sticker on it, you want it to have one of the codes from the title of this thread. Those are the LSD versions.

shif7i7down · 11-24-2014, 03:28 PM

Will i just bought a is300 m85 lsd differential for 350usd and will be swapping out the oem+ 4.67 mfactory differential.
I'll let you guys know if it fits or not.
Couldn't wait for someone to prove it out so i guess I'll prove it to myself if it's a direct bolt on or not.

If theres enough interest i can document the install and if it works, might be of some use to other turbo guys out there

Dipstik-sportech · 11-24-2014, 05:51 PM

Quote:

Originally Posted by shif7i7down

Will i just bought a is300 m85 lsd differential for 350usd and will be swapping out the oem+ 4.67 mfactory differential.
I'll let you guys know if it fits or not.
Couldn't wait for someone to prove it out so i guess I'll prove it to myself if it's a direct bolt on or not.

If theres enough interest i can document the install and if it works, might be of some use to other turbo guys out there

Lil late to the party bud I've been running with the m85 3.73 diff for 7 months now. 100% direct bolt in they're the exact same third member in both cars, the only differences are that the lexus uses stub axles which u just pop out and the Lexus uses Allen headed bolts for the rear mounts where as our cars have 17mm hex head

spitfire481 · 11-24-2014, 10:30 PM

I have one as well. Great mod for turbo cars

OmarGC · 11-24-2014, 10:56 PM

I need one

kodyo · 11-24-2014, 11:31 PM

Also did the swap with a standard 7.8" V6 toyota gearing (4.56 ratio), documented my build on the tail end of this DIY:
http://www.ft86club.com/forums/showthread.php?t=54054

shif7i7down · 11-25-2014, 07:22 AM

Quote:

Originally Posted by Dipstik-sportech

Lil late to the party bud I've been running with the m85 3.73 diff for 7 months now. 100% direct bolt in they're the exact same third member in both cars, the only differences are that the lexus uses stub axles which u just pop out and the Lexus uses Allen headed bolts for the rear mounts where as our cars have 17mm hex head

Do you have a diy thread i can look at.
And...

Dipstik-sportech · 11-25-2014, 07:37 AM

No diy thread as I'm the kind of person that just likes to get shit installed lol. It's really not difficult, just got to remember to take the lower control arm and toe arm off the hub side so u can remove the axles from the diff.

I cant remember if I put it in this thread or not

http://www.ft86club.com/forums/showthread.php?t=40169

shif7i7down · 11-25-2014, 08:28 AM

Quote:

Originally Posted by Dipstik-sportech

No diy thread as I'm the kind of person that just likes to get shit installed lol. It's really not difficult, just got to remember to take the lower control arm and toe arm off the hub side so u can remove the axles from the diff.
I cant remember if I put it in this thread or not

http://www.ft86club.com/forums/showthread.php?t=40169

Nice car, i can only wish to be as beasty as you.

kodyo · 11-25-2014, 07:30 PM

Quote:

Originally Posted by shif7i7down

Do you have a diy thread i can look at.
And...

Check my last post, that's a DIY thread on how to do the swap. The original guy who did it was really concise, but my stuff is kind of a cluster f@ck, so hopefully it makes sense and is helpful. Assuming that is what you are asking for.

mrk1 · 08-14-2015, 12:17 PM

Update an old thread, I just purchased a $99 Lexus diff off eBay. I thought it was going to be a 3.91 open and I was just going to pull the ring and pinion but upon arrival I found its a 3.91 Torsen LSD! The part number sticker is no longer there so I know this may not be a huge help but I'm pumped!

3.91 LSD should be M98, I was just under the impression it was clutch type

fika84 · 08-14-2015, 01:55 PM

Quote:

Originally Posted by mrk1

Update an old thread, I just purchased a $99 Lexus diff off eBay. I thought it was going to be a 3.91 open and I was just going to pull the ring and pinion but upon arrival I found its a 3.91 Torsen LSD! The part number sticker is no longer there so I know this may not be a huge help but I'm pumped!

3.91 LSD should be M98, I was just under the impression it was clutch type

That's a nice surprise! My understanding is that none of the lexus rear ends are clutch type. Where did you read/see that they were?

You're boosted though right? So are you just going to bolt up this rear and for the longer gears?

11-24-2014, 03:28 PM	#18
shif7i7down Erected Member Join Date: Mar 2014 Drives: frs Location: Wisconsin Posts: 391 Thanks: 69 Thanked 185 Times in 100 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	Will i just bought a is300 m85 lsd differential for 350usd and will be swapping out the oem+ 4.67 mfactory differential. I'll let you guys know if it fits or not. Couldn't wait for someone to prove it out so i guess I'll prove it to myself if it's a direct bolt on or not. If theres enough interest i can document the install and if it works, might be of some use to other turbo guys out there __________________ https://www.facebook.com/profile.php?=87912848 Last edited by shif7i7down; 11-24-2014 at 03:42 PM.

11-24-2014, 10:30 PM	#20
spitfire481 Senior Member Join Date: Mar 2013 Drives: 2JZ FRS Location: Pure Automotive Performance Posts: 1,378 Thanks: 97 Thanked 1,354 Times in 621 Posts Mentioned: 27 Post(s) Tagged: 2 Thread(s)	I have one as well. Great mod for turbo cars __________________ Pure Automotive Performance MoTeC Build Thread @spitfire481

11-24-2014, 10:56 PM	#21
OmarGC My FR-S has 5 gears Join Date: Aug 2012 Drives: FRS/280z/Tundra Location: St. Louis Posts: 1,994 Thanks: 626 Thanked 1,065 Times in 572 Posts Mentioned: 49 Post(s) Tagged: 3 Thread(s)	I need one __________________ Omar GC 2JZ - 6870 - stock block - 1000whp? Instagram: 2jzus

11-25-2014, 07:37 AM	#24
Dipstik-sportech Senior Member Join Date: Oct 2012 Drives: 2013 BRZ satin white pearl sportech Location: Thunder Bay Ontario Canada Posts: 1,813 Thanks: 842 Thanked 911 Times in 576 Posts Mentioned: 43 Post(s) Tagged: 0 Thread(s)	No diy thread as I'm the kind of person that just likes to get shit installed lol. It's really not difficult, just got to remember to take the lower control arm and toe arm off the hub side so u can remove the axles from the diff. I cant remember if I put it in this thread or not http://www.ft86club.com/forums/showthread.php?t=40169 __________________ 2013 SWP BRZ sportech. 11.11sec@129.01mph, 511whp on e70. FullBlown base kit, FullBlown built 9.5:1 engine, GTX3076R GEN2 turbo, 1700cc Bosch injectors, FullBlown flex fuel kit, FullBlown radiator and oil cooler, FullBlown custom 3" dual exit exhaust, act xtreme clutch, whiteline diff and subframe inserts, BC Racing coilovers, hotchkiss 18mm rear sway, is300 3.73 differential ... Never finished

08-14-2015, 12:17 PM	#27
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 21 Post(s) Tagged: 2 Thread(s)	Update an old thread, I just purchased a $99 Lexus diff off eBay. I thought it was going to be a 3.91 open and I was just going to pull the ring and pinion but upon arrival I found its a 3.91 Torsen LSD! The part number sticker is no longer there so I know this may not be a huge help but I'm pumped! 3.91 LSD should be M98, I was just under the impression it was clutch type __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD Last edited by mrk1; 08-14-2015 at 12:41 PM.

08-13-2013, 08:10 PM	#15
PantsDants Senior Member Join Date: Jul 2013 Drives: Scion FR-S A/T, Whiteout Location: Seattle Posts: 334 Thanks: 57 Thanked 221 Times in 90 Posts Mentioned: 16 Post(s) Tagged: 2 Thread(s)	Just got off the phone with Ishii Motor Industries. They're building a stockpile of IS300 differentials just for the purpose of swapping final gears out for our cars.

11-24-2014, 11:31 PM	#22
kodyo Senior Member Join Date: Jan 2013 Drives: Scion FR-S Location: Los Angeles Posts: 686 Thanks: 597 Thanked 257 Times in 174 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Also did the swap with a standard 7.8" V6 toyota gearing (4.56 ratio), documented my build on the tail end of this DIY: http://www.ft86club.com/forums/showthread.php?t=54054

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