IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

IS350 transmission failure post supercharger install

Thread Tools
 
Search this Thread
 
Old 07-03-22, 05:46 PM
  #1  
swaangin
Racer
Thread Starter
 
swaangin's Avatar
 
Join Date: Sep 2017
Location: nj
Posts: 1,664
Received 377 Likes on 286 Posts
Default IS350 transmission failure post supercharger install

Just watched a few of his vids, very interesting stuff since the 350 motor is carried onto the 3IS (I understand his is the 2IS but same drivetrain). This guy spent thousands on the supercharger, then he had his transmission altered (with some springs upgrade and transmission fluid change?), and even after that it failed. This guy's IS only had around 70k on the dash when he got this done and claimed the old transmission 'wasn't taken care of that well'.. that's only 70k miles and some people on this forum haven't changed their transmission fluid within that time.

He, then, bought a used transmission from a GS350 and says it shifts better.

I had 2 questions:

1) Is the IS350 and GS350 engine the same, if so is the transmission the same?

2) Wouldn't it have been a better idea to just purchase a faster car, such as an ISF instead of going through this trouble money wise?
($7000 supercharger, RR racing install (generous because it definitely takes a long time to install $750?), preventative maintenance + parts (generous @ $500 as well?), $1000 GS350 used transmission ($500?) comes out to $9750 but let's say ~$10,000.

Old 07-04-22, 03:53 PM
  #2  
Sasnuke
Lexus Test Driver
 
Sasnuke's Avatar
 
Join Date: Feb 2017
Location: Richmond Hill, Ontario, Canada
Posts: 6,260
Received 1,737 Likes on 1,370 Posts
Default

Answers:
1. Yes and Yes
2. Yes (but you have to account for the 'can you build it' vs 'can you just buy it' argument)

The one member on here with the twin turbo 3IS making stupid power still runs the stock tranny...so I'm thinking the guy in the vid just had a bum tranny to start with...and modding it didn't help...or the mods fudged it.
The following users liked this post:
swaangin (07-05-22)
Old 05-12-24, 02:14 PM
  #3  
FennyMike
Pit Crew
 
FennyMike's Avatar
 
Join Date: Nov 2021
Location: FL
Posts: 112
Received 12 Likes on 11 Posts
Default

Originally Posted by Sasnuke
Answers:
1. Yes and Yes
2. Yes (but you have to account for the 'can you build it' vs 'can you just buy it' argument)

The one member on here with the twin turbo 3IS making stupid power still runs the stock tranny...so I'm thinking the guy in the vid just had a bum tranny to start with...and modding it didn't help...or the mods fudged it.
9mesh (turbo 3is) has the 8 speed. The strength of the 8 speed vs the 6 speed is unmatched
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
dboo06is
IS - 2nd Gen (2006-2013)
7
09-28-23 02:12 AM
edgar23cb
GS - 3rd Gen (2006-2011)
2
04-20-22 05:18 AM
jasonguo
GS - 4th Gen (2013-2020)
5
08-16-19 08:46 PM
Kenny88880
IS - 2nd Gen (2006-2013)
21
08-28-15 01:08 PM
Atl
LS - 1st and 2nd Gen (1990-2000)
7
11-08-07 08:35 PM



Quick Reply: IS350 transmission failure post supercharger install



All times are GMT -7. The time now is 09:14 AM.