6TXX Tranny Swap

[carsdgsames]

Hi! My transmission has been whiny and the TCM seems to have no power going to it anymore, which all point to new transmission time. I've been looking all over for suitable replacements (6T30 from the 1.8s, 6T40 from the RS, etc etc.) and I came across the Cruze's 9-speed. I've done lots of looking but haven't found anything regarding a successful (or even attempted) swap. Seeing as the primary issues I'm going to have is electronic communication, am I stuck with our 6-speed?

'14 Sonic LTZ Turbo
~130k miles
Trifecta Tuned

 

[SuperS13]

Hey man, came across your post, got a '13 sonic 1.8L with a 6t30 transmission...mine is slipping in 1-2 and sometimes 3-4. Got 96,500 on the odometer I've been doing research and the 1.4L/1.8L platforms can accept up to a 6T45 trans before the bell house bolt pattern severe changes, the 6t50 bolt pattern diameter become bigger on the bellhousing. you can use the 6t30 tcm and bolt that onto a 6t40, the 6t45 is a bit bigger and can be massaged into the sonic engine bay. Would definitely recommend a 6t45 since its rated for 300ftlb torque.