I got a package from DIYautotune.com on Friday that had the 16-pin 4L60e transmission plug and a generic wiring harness, which is the last computer part I needed to install a 4L60e in the Firebird. I have a MegaSquirt 2 I removed from the Thunderbird that can be re-purposed as a transmission controller.
The next question became, do I gamble and install the 4L60e, I bought a while a go, as is (or with a slight shift kit) and see how it does, or do I completely disassemble it like I did the 200-4r? The rebuild kit with stronger internals and new electronic's, etc is $625. The guy I bought the trans from was also selling the Chevy 350 with a rod knock it was attached too, so I have some faith it's in somewhat decent shape. It's got a rebuild sticker on it from a shop in Utah, which he said it was rebuilt in 2008. For about $120 I can do a shift kit and external servo. Which for a naturally aspirated six would likely last a long time. I also already have the adapter plate and shims needed to bolt it to the Pontiac block.
Looking around, a professionally rebuilt units run around $1100 plus shipping. Some require a core, some do not.
I put the trans on the bench and popped the pan off. There was some dirt piled up under the brush cover and it got into the pan when I popped it loose, but otherwise it looks pretty good over all. I think I'll get a Trans-Go HD2 shift kit and a "Corvette" 4th gear servo and call it good. Summit has the kit for $80 and the servo is $12 on Amazon.
Looks like it got a new TCC valve when it was rebuilt.
The pan easily wiped clean and minimal amount of material on the magnet.
And I've been driving the car to work for the last week.
