Building an IS350 6MT
Intermediate
Joined: Oct 2015
Posts: 354
Likes: 26
From: California
hows the RPM’s at like 80mph? Acceleration night and day difference? Would it be similar to a 6AT is250 with the stock final drive ratio, but the rpm’s similar to how it is when driving in 5th gear in the 6 speed automatic is250?
Rookie
Joined: May 2019
Posts: 43
Likes: 2
From: Sachsony
mfactory
4.6 final drive ratio? What LSD did you put in? y38?
hows the RPM’s at like 80mph? Acceleration night and day difference? Would it be similar to a 6AT is250 with the stock final drive ratio, but the rpm’s similar to how it is when driving in 5th gear in the 6 speed automatic is250?
hows the RPM’s at like 80mph? Acceleration night and day difference? Would it be similar to a 6AT is250 with the stock final drive ratio, but the rpm’s similar to how it is when driving in 5th gear in the 6 speed automatic is250?
Its pulling hard but.nonexisstent 1st gear cuz its super short. So far its for city driving. 60mph almost 3k rpm on 6th gear which means max 120mph if not less topspeed. But with a shortshifter its running through gears like nothing you can change gears all the time and its engaging. I might go back to 4.1 or smthing but atm i am doing supporting mods like joeyz shaft bracket maybe different disc connection between diff and drive.shaft etc...
Rookie
Joined: Sep 2023
Posts: 33
Likes: 15
From: Kildare - Ireland
Right, I am transferring this engine swap thread to the new thread as promised. Because I already got the motor delivered.
Thread name: " 2GR-FSE Tom's Supercharged is250 with 8HP-ZF70 with DCT and Clutch "
Post moved to >>>> HERE <<<<
Thread name: " 2GR-FSE Tom's Supercharged is250 with 8HP-ZF70 with DCT and Clutch "
Post moved to >>>> HERE <<<<
Last edited by is250sage2007; Jan 24, 2026 at 10:25 PM.
9th Gear
Joined: Jan 2026
Posts: 9
Likes: 3
From: AZ
Nobody I know can program it. I had a software programmer on that trying to simulate the AT modules and the car ran with limited power. Took 6 months of bench testing and was waste of time. Buy the unit from All4swap cuz he dealt already with the intrusive part of AT codes and lot of other things work out of the box and you can concentrate on things like AC, alternator, cruise control etc. Car will limit power if detects too much torque and clutch pedal signal. The mechanical part is pretty much bolton.
What flywheel did you use for your build, and does the stock 4GR flywheel work? What did you do for the clutch? Does the upgraded ECU read it? I've read the whole thread so far, but again, I just want to verify these things. Also, did any of you guys swap over the cluster, and should I swap over the diff from the 350?
Also, do you know if the 2GR's transmission would work with the 4GR? I was thinking of possibly swapping everything I needed and selling the donor as a runner.
Sorry for continuing the older thread, but I'll start a new thread if I go through with the project.
Would love to hear from any of you who've finished the swap.
Thanks
Joe
Last edited by Joe313000; Feb 5, 2026 at 06:20 AM.
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