#TransmissionSwap

Welcome back for another installment of “Ask Jack”, the place for you, the man on the street, to ask me, the man on the Internet, any question you like on any topic that makes its way into your mind.

Today’s question seems like a simple one: do you stay in the Matrix or not? In this case, the Matrix is a Toyota Matrix, with the all-too-common manual-transmission failure. But to properly answer the question, we’ll need to consider everything from solo ocean journeys to bad seeds in a magic bus.

The 1941 Plymouth Special Deluxe sedan Junkyard Find that I bought from the Brain-Melting Colorado Junkyard last fall now has the body off the frame and is awaiting a Lexus SC400 suspension subframe swap. After much debate about what engine/transmission combo to use in this Hell Project (the plan is to build it to Pikes Peak International Hill Climb specs, while retaining a grimy-looking rat-roddish character), I decided to go with the GM Vortec 4200 aka LL8 L6 engine, with turbocharging added, and that meant that I’d need to find a manual transmission that can withstand at least 400 ft-lbs of torque. Since the Vortec 4200 never came with a manual transmission, and the pseudo-bolt-on Aisin-based 5-speed out of the Solstice and Colorado can’t take the sort of power I’m hoping to get (thus forcing me to go the machine-shop bellhousing-adapter/custome-flywheel route), I was looking for a Borg-Warner T-56 out of a fourth-gen GM F-body, or maybe a Tremec TKO out of a fourth-gen Mustang. Then, an ad for a ZF S6-40 6-speed showed up on Denver Craigslist, with a very reasonable asking price.

Frank writes:

Good morning,

I am planning a transmission swap in my 2006 five hundred from a 2WD CVT to the offered 6speed of the same vintage. So far as I have discerned, I will need the trans, flywheel, axleshafts, computer and harness. A few compatibility questions though, trans mounts? speedo cable? Shifter and/or linkage? How about the PCM that controls the trans. They offer a few different ones, specifically: