pipefitter22

Is there a way to swap 6 speed manual in a 08ss impala and what would i need?

eng1nerd

iTrader: (2)

There is a guy around here that made a 6 spd out of a G6 work but he had to machine a custom flywheel. Anything can be done with time and money but I don't know of an off the shelf combo to make it happen.

tonypaul

iTrader: (2)

Check with fieroguru here and he has his entire project here; (but its in a Fiero)
http://www.fiero.nl/forum/Forum3/HTML/000123.html

fieroguru

iTrader: (1)

There are 3 running LS4/Manual transmission setups in Fieros to date. Two used the G6 F40 6 speed manual, the other used the acura NSX 5 speed with an adapter plate. Mine kept the E67 ECM, the other two used microsquirt.

To mate the engine/transmission, you will need a starter solution and a flywheel/clutch solution. I have shared how I solved these issues in my build thread, either the one linked to here on LS1 Tech, or this one:
http://www.fiero.nl/forum/Forum3/HTML/000123.html

The other F40 used a LS1 tilton button flywheel and a 7 1/4" clutch setup with a custom HTOB setup and welded the starter mount to the transmission case. You can see the details here:
http://www.fiero.nl/forum/Forum2/HTML/123953.html

Beyond the starter/flywheel/clutch, you will need mounts, axles, shifter, shifter cables, and clutch pedal with associated hydraulics. None of these items have been sorted for the OEM LS4 applications.

Since I am running the E67 ecm with a modified LS4 calibration and kept the TCM wired up, the ecm side is quite simple, just need someone who can turn off all the TCM DTCs (HP Tuners can't, but TunerCat can)