Chevrolet Colorado & GMC Canyon Forum banner

1 - 20 of 65 Posts

·
Registered
Joined
·
245 Posts
Discussion Starter #1
Starting this thread because my turbo is about to blow up my junkass 4L60e lol!

I'm lookink primarily at a T56 Magnum swap right now, but the 6L80/6L90 is an interesting option also. Gonna post links to some websites after work today.
 

·
Registered
Joined
·
245 Posts
Discussion Starter #2 (Edited)

·
maniac mechanic
Joined
·
5,779 Posts
Only downfall to the 6Lxx's is the weight of them. I hear very good things though from people who have them.

The T56 would be a lot more fun though.
 

·
Super Moderator
Joined
·
1,880 Posts
It's only approx. 75lbs more. :)

I weigh 140 lbs. Soaking wet. Add 75lbs. That is the average 215lb. Red neck ( no offense to any red necks) that may be running me with a 4l60e. I can live with that. Lol

now search for 6l90e paddle shift. Oh, the possibilities! Of course it would be very customized to make it work properly.
 

·
Registered
Joined
·
868 Posts
One of the best things about my T56 is the super tall(.50)sixth gear,with the LS3 I have enough power to cruise at eighty mph at 1850rpms ,get 24mpg and still pass and climb hills easily.(3.73rear gear)
There are times in rush hour when a auto.would be just fine though!
I ordered the truck with an auto because my S10 with the LS1 had a T56 and I thought an auto.would be fun for a change but I soon converted to a T56 because the mileage difference on my cabin commute was a whole bunch! 80mph with the auto was like 2500rpm which was about 7-8mpg less.
 

·
Premium Member
Joined
·
670 Posts
I would like to have a 6L80E six speed auto myself but not sure if the bell housing bolt pattern is the same for the 3.7L I5 engine.

There's not much of a difference in size & weight.

...4L60E Right Side 6L80E Left Side
 

Attachments

·
Premium Member
Joined
·
2,499 Posts

·
Super Moderator
Joined
·
1,880 Posts
One of the best things about my T56 is the super tall(.50)sixth gear,with the LS3 I have enough power to cruise at eighty mph at 1850rpms ,get 24mpg and still pass and climb hills easily.(3.73rear gear)
There are times in rush hour when a auto.would be just fine though!
I ordered the truck with an auto because my S10 with the LS1 had a T56 and I thought an auto.would be fun for a change but I soon converted to a T56 because the mileage difference on my cabin commute was a whole bunch! 80mph with the auto was like 2500rpm which was about 7-8mpg less.
With 3.73 r&p, 27.25 tall tire (235/50/18), 80mph, and .7 4th gear ratio on a 4l60e. I got just over 2500rpm.

With 3.42 r&p, 27.25 tall tire (235/50/18), 80 mph, and .63 6th gear ratio 6l90e. I got just over 2100rpm

with 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio (wide ratio t56). I got just over 1800rpm.

with 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio ( wide ratio t56 ). I got just over 1675rpm.

all of this is internet data and is subject to be wrong. Just did some quick searching and number crunching. Food for thought on anyone wanting to make the decision one way or the other. I know there is a close ratio t56 which would be :

With 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2450rpm

With 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2250rpm

For me my driving is almost all hwy. Wouldn't matter to me much on mpg. I respect everyones decision to go manual vs auto for their own reasons. :D
 

·
Registered
Joined
·
245 Posts
Discussion Starter #9
With 3.73 r&p, 27.25 tall tire (235/50/18), 80mph, and .7 4th gear ratio on a 4l60e. I got just over 2500rpm.

With 3.42 r&p, 27.25 tall tire (235/50/18), 80 mph, and .63 6th gear ratio 6l90e. I got just over 2100rpm

with 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio (wide ratio t56). I got just over 1800rpm.

with 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio ( wide ratio t56 ). I got just over 1675rpm.

all of this is internet data and is subject to be wrong. Just did some quick searching and number crunching. Food for thought on anyone wanting to make the decision one way or the other. I know there is a close ratio t56 which would be :

With 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2450rpm

With 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2250rpm

For me my driving is almost all hwy. Wouldn't matter to me much on mpg. I respect everyones decision to go manual vs auto for their own reasons. :D
Thanks for doing the math FrEaK!
My truck isn't really a DD but that .50 OD in the wide ratio T56 would definitely make me drive it more on trips if I got 24 mpg!
Right now I'm thrilled if I get 19 :th_woot:
 

·
Registered
Joined
·
868 Posts
With 3.73 r&p, 27.25 tall tire (235/50/18), 80mph, and .7 4th gear ratio on a 4l60e. I got just over 2500rpm.

With 3.42 r&p, 27.25 tall tire (235/50/18), 80 mph, and .63 6th gear ratio 6l90e. I got just over 2100rpm

with 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio (wide ratio t56). I got just over 1800rpm.

with 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .5 6th gear ratio ( wide ratio t56 ). I got just over 1675rpm.

all of this is internet data and is subject to be wrong. Just did some quick searching and number crunching. Food for thought on anyone wanting to make the decision one way or the other. I know there is a close ratio t56 which would be :

With 3.73 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2450rpm

With 3.42 r&p, 27.25 tall tire ( 235 / 50 / 18 ), 80mph, and .67 6th gear ratio. I got just over 2250rpm

For me my driving is almost all hwy. Wouldn't matter to me much on mpg. I respect everyones decision to go manual vs auto for their own reasons. :D
That is all pretty close I would say,I am running a 28" tire.
 

·
How d'ya like them apples
Joined
·
941 Posts

·
Registered
Joined
·
245 Posts
Discussion Starter #16
Why do you need a Magnum t56?
Shifter mounting options, 700 ftlbs torque capacity, comes in kit form, customer support from Hurst Drivelines...and because I have a big penis lol!
 

·
Registered
Joined
·
245 Posts
Discussion Starter #17
Because they think its in a truck of the same weight ( even though same internals) it will last longer. Oh and its harder to find and costs more. @Karlen
They're easy to find. Hurst told me it would ship same day purchased. Traditional T56 is rated at 450 ftlbs torque capacity. I'll pay an extra $500 for the additional torque capacity any day. You wouldn't? Put a turbo on your truck and let's see if your opinion changes lol!
 

·
Registered
Joined
·
1,394 Posts
They're easy to find. Hurst told me it would ship same day purchased. Traditional T56 is rated at 450 ftlbs torque capacity. I'll pay an extra $500 for the additional torque capacity any day. You wouldn't? Put a turbo on your truck and let's see if your opinion changes lol!
Funny you mention that, I am turboed, lmfao!
 

·
Registered
Joined
·
245 Posts
Discussion Starter #19
1 - 20 of 65 Posts
Top