BRX/FRS diff the same as IS300? - Page 7 - Lexus IS Forum
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post #91 of 186 (permalink) Old 11-21-2015, 11:14 PM
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nice write up with photos!!! hardest part for me was lining up the rear diff mounts to the subframe and getting those bolts torqued down to spec . used the washer technique i see hehhehe thats what i did because i just wanted to test and see if the shit even worked. when i am not lazy ill probably pull it back down and push out the lexus diff bushings and see if they fit winter is here so I will be in my garage alot more.
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post #92 of 186 (permalink) Old 11-23-2015, 07:04 AM
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having the lift and stand really helped. As well as having a couple extra hand to hold things in place. I was worried about breaking bolts the whole time as theyve all been on there for around 11 years. The only ones we broke were holding the farthest back plastic cover that goes under the car. I just decided to not even put it back on lol.

2004 IS300 Eshift
BRZ 4.1 LSD - 18x8.5 Evo X Enkei's - Koni
- Tein - Stoptech - EBC - Tanabe
Thread: http://my.is/forums/f219/tvl3rds-2004-is300-565586/
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post #93 of 186 (permalink) Old 11-24-2015, 02:53 PM
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Since I didn't have the time I had a shop do the install for me. He had a fun time getting the rusty stuck bolts removed, especially on the axles. But all is well and she's in! Feels and looks nice under there. I definitely recommend this swap.

01 IS300 - MSM - 185k mile high club

Currently in: snow mode

BRZ Differential w/ 4.1 -- K&N FIPK Intake -- CXRacing Coilovers -- IS350 Wheels -- Greddy Lip [RIP :(]

Hotchkis Sways -- Megan Racing Y-Pipe -- Spec-d Catback (for now)

"Gotta work on the nut behind the wheel before you start fixing bolts on the car"
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post #94 of 186 (permalink) Old 12-09-2015, 07:47 AM
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looks like half my pictures corrupted on imgur and disappeared. Just re-uploaded and tried to fix my post so hopefully they're all showing again.

2004 IS300 Eshift
BRZ 4.1 LSD - 18x8.5 Evo X Enkei's - Koni
- Tein - Stoptech - EBC - Tanabe
Thread: http://my.is/forums/f219/tvl3rds-2004-is300-565586/
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post #95 of 186 (permalink) Old 12-11-2015, 09:01 AM
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hello. this is my first post here. been looking since i purchased my is300 a few months ago. figured since i had something that might be useful i would chime in.

did this swap two days ago. bought the frs rear diff for $325 at a local yard. jacked the back end up and started the swap. as it's been stated several time, the bolts don't work. i found a simple fix that i haven't seen anywhere.... the problem i noticed was not that the bushings were different heights but that the inner hole diameters were different. the bolt from the is300 has a taper. it simply doesn't fit into the frs bushing. i took a 3/4 unibit and made the hole bigger. the bolt slid right in and tightened up. there was plenty of metal left on the sleeve. didn't cost me anything as i already had the unibit.
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post #96 of 186 (permalink) Old 12-11-2015, 09:44 AM
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nice work!

2004 IS300 Eshift
BRZ 4.1 LSD - 18x8.5 Evo X Enkei's - Koni
- Tein - Stoptech - EBC - Tanabe
Thread: http://my.is/forums/f219/tvl3rds-2004-is300-565586/
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post #97 of 186 (permalink) Old 12-11-2015, 09:58 AM
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I had access to a second IS300 diff so I stacked two of the rubber washers together and it worked perfectly.

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post #98 of 186 (permalink) Old 12-15-2015, 02:20 PM
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I may have missed it, but did anyone ever confirm whether or not the BRZ diff cover will bolt on to an IS300 diff? There are a number of very nice billet covers offered for the BRZ now, it would be nice if us IS300 diff guys could bolt those on. Thanks.
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post #99 of 186 (permalink) Old 12-16-2015, 12:08 PM Thread Starter
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post #100 of 186 (permalink) Old 12-16-2015, 05:15 PM
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I'm starting to get the itch to do this. I park the car half on gravel in my driveway. It slopes up hill and I back in and I almost always spin the wheel on the gravel.

Someone calm my fears about the allen bolt access.
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post #101 of 186 (permalink) Old 12-16-2015, 05:17 PM Thread Starter
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I just got one built into a socket. I drop the rear sway bar.

Honestly if I was going to change the diff out tomorrow, I'd drop the entire diff cradle with everything attached. I've gotten so I can to it in under 30 minutes.
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post #102 of 186 (permalink) Old 12-16-2015, 07:16 PM
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Quote:
Originally Posted by Land Ark View Post
I'm starting to get the itch to do this. I park the car half on gravel in my driveway. It slopes up hill and I back in and I almost always spin the wheel on the gravel.

Someone calm my fears about the allen bolt access.

Remove the sway bar and it's not that bad. A lift and a second person always helps.
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post #103 of 186 (permalink) Old 01-14-2016, 10:36 AM
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Garage
Quote:
Originally Posted by BADABING View Post
I may have missed it, but did anyone ever confirm whether or not the BRZ diff cover will bolt on to an IS300 diff? There are a number of very nice billet covers offered for the BRZ now, it would be nice if us IS300 diff guys could bolt those on. Thanks.
Id like to know this as well....
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post #104 of 186 (permalink) Old 01-14-2016, 03:53 PM
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Quote:
Originally Posted by hwnpeeps View Post
Id like to know this as well....

I say someone buy one and try it out. Return it if it doesn't, keep it if it does!

01 IS300 - MSM - 185k mile high club

Currently in: snow mode

BRZ Differential w/ 4.1 -- K&N FIPK Intake -- CXRacing Coilovers -- IS350 Wheels -- Greddy Lip [RIP :(]

Hotchkis Sways -- Megan Racing Y-Pipe -- Spec-d Catback (for now)

"Gotta work on the nut behind the wheel before you start fixing bolts on the car"
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post #105 of 186 (permalink) Old 02-13-2016, 10:01 PM
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Would the brz/frs lsd swap be a better swap than the mk3 lsd? Only because it seems like it's more of a plug and play.
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