GM's new 6 speed RWD caddy automatic
06-10-2006, 10:17 PM
#21
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Originally Posted by BlackHawk T/A
You might be surprised to hear this then, but my mileage didn't drop with the install of my converter...
Still averaged 17 through the last tank, same as ever.
Still averaged 17 through the last tank, same as ever.
Wow...I get 17mpg with a TH350, 4000stall (loose as hell too) and 9" with 3.50 gears...on an island so its always a half *** highway/city mix! I wouldn't continue referencing the TM issue, as stated, either use a converter box if you need to, or go RMVB and you'd keep the power in the range through the shifts. I agree, need to hit the Cad boards to check on this trans.
06-11-2006, 10:03 AM
#22
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Originally Posted by B T
BlackHawk,
What rear gear are you running?
Also, what's your ET and MPH in the 1/4?
17 mpg, is that an average or is that light driving with your mods?
What percent hwy and city?
Thanks.
BT
What rear gear are you running?
Also, what's your ET and MPH in the 1/4?
17 mpg, is that an average or is that light driving with your mods?
What percent hwy and city?
Thanks.
BT
No track numbers, sorry
Highway/City mix, I try to drive locked up most of the time in either 3rd or 4th 30-55mph
Just wanted to say my mileage didn't drop with the converter like most people talk about. Was in response to the efficienty/mileage comment.
07-25-2006, 09:44 AM
#24
Looking at the GM specs on the 6l80 trans it is rated at a lower torque # than the TUFF 4l60-e the rating on the 4l60-e at the gear box after the converter is 670 ft lbs and the 6l80 is rated at 664 ft lbs and the 4l80-e is rated at the same point to 885 ft lbs 
and as the 6l80 is built off of the 4l60e that would sound correct.
and as the 6l80 is built off of the 4l60e that would sound correct.
07-26-2006, 09:19 AM
#25
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Originally Posted by Yank
Looking at the GM specs on the 6l80 trans it is rated at a lower torque # than the TUFF 4l60-e the rating on the 4l60-e at the gear box after the converter is 670 ft lbs and the 6l80 is rated at 664 ft lbs and the 4l80-e is rated at the same point to 885 ft lbs
and as the 6l80 is built off of the 4l60e that would sound correct.
and as the 6l80 is built off of the 4l60e that would sound correct.
