Was wondering what all is required to do an 06 trans into an 04.5 LLY truck? My buddy can get a great deal on an 06 trans, and wanted to know what all needs to be done to make it work in his 04.5? Any help would be great!! Thanks!!
06 Trans in an 04.5 LLY
- Thread starter millerman04
- Start date
Swap in the LLY valve body, internal wiring harness, shift shaft, and NSBU and go.
Thats all? Figured it woulda been alot more
You will loose 6th gear. To keep that, it is a lot more work. But if you don't care, it should be straightforward enough.
Im thinkin he wanted the 6th gear kept. Now the fun begins right? 
Im thinkin he wanted the 6th gear kept. Now the fun begins right?
Tell him to call SUNCOAST then as the ONLY way to get 6th gear in an 01-05 truck is with the SUNCOAST TCM calibration(or somebody out there who has it as I know a few other tuners have it as well). Even then, you still need a modified 04-05 valve body as I don't know of any TCM calibration that will allow a 5 speed TCM to work with the 6 speeds lockup solonoid.
suncoasts website says it uses a 6 speed valve body mot a modified 5 speed
I don't see this on there site. http://www.suncoastconverters.com/shop/gm-allison-5-6-speed-conversion/#product-details And you can tell by looking at the pictured valve body it is a modified 5 speed 04-05 5 speed unit with the holes and 6th gear tube added. I have set a 04-05 5 speed and a 6 speed on the bench next to each other, and they are VERY simliar, but to make the 5 speed compatible lockup solonoid fuction requires using a modified 5 speed unit as the 6 speeds lockup solonoid bore is quite a bit different from a 5 speeds.
Thanks for the info guys!! :thumb: