G56 transmission update?

[RussellSmith]

I have a 06 G56 6 sp. In a reg cab with 3. 73 gears

Recently in magazine #60 page 48 there is talk about a new overdrive ratio in an updated G56. My G56 has the . 79 to 1 overdrive and the new trans has a . 74 to 1 overdrive. does anyone know very much about this and could this overdrive gear be installed into my current early production G56? Thanks

 

[ENafziger]

Hey Russell!

Welcome to the board. This has been discussed before, and someone even came up with a parts break-down of what would be involved with doing the swap. As I remember, it proved very expensive... I hate to say the number because I don't recall, but I was thinking around $900 in parts, and some pretty extensive labor.

Try using the "Search" feature and you should come up with plenty of reading.

If you're for a higher gear ratio, some people have done the 3. 42 gear swap available for our AAM axles. Other options include overdrive units, such as U. S. Gear, Gear Vendors, Mitchell, etc.

--Eric