fozzi58
Full Access Member
There's a guy on TikTok I saw that put the same drivetrain in his GMT900 tahoe. I will have to look for it and post again here.
But yeah I've been considering it too. I'm super disappointed that the 4.10s I have are screaming on the highway with my 6L80. I didn't realize the final drive ratio between the T56/TR60 is much lower than the 6L80. I have 3.73's in my TA and at 80mph I am at 1800 rpm. My Burn is creeping up to 2250rpm at 80mph and thats with my 24's. When I put the 22's on with the low profile tires its over 2500rpm. That's NG for trips more than 30 mins which I do a lot of.
It would probably be easier to get a 10 speed in there but its also twice the price ($7k vs $14k)
But yeah I've been considering it too. I'm super disappointed that the 4.10s I have are screaming on the highway with my 6L80. I didn't realize the final drive ratio between the T56/TR60 is much lower than the 6L80. I have 3.73's in my TA and at 80mph I am at 1800 rpm. My Burn is creeping up to 2250rpm at 80mph and thats with my 24's. When I put the 22's on with the low profile tires its over 2500rpm. That's NG for trips more than 30 mins which I do a lot of.
It would probably be easier to get a 10 speed in there but its also twice the price ($7k vs $14k)
