Average rpm at 70mph??
#31
11-20-2012, 05:20 PM
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Mine runs 72 mph @ 2000 RPM's, here's a link, to figure it out. The 46re trans is .69:1 ratio in OD and transfer is 1:1, everything else put in according to your truck, leave MPH blank or RPM blank. Mine is spot on with this. Remember a 33" tire is more like 32.6" not truly 33"
http://www.4lo.com/calc/gearratio.php
http://www.4lo.com/calc/gearratio.php
Last edited by Halojm; 11-20-2012 at 05:24 PM. Reason: Corrections
#32
11-20-2012, 07:46 PM
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#36
11-21-2012, 03:37 PM
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#37
11-22-2012, 02:16 AM
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So my curiosity brings up some things. One is the miles on both trucks is high.
In the 5.9 I was once able to get 315 mountain hiway miles on a tank.
With the new tranny im lucky to see 240 and it seems like the r s arr up.
Two- 2100 rpm at 70 is not unrealistic with a rack...the red one is 5.2.
Bad tranny or not. At 70 tcc engaged feels fine. At 5mph it crunches makes me wince.
I found the red one fir sale xtra cheap rear speed sensor wire was cut.
Except the crunching its super tight. And if At 70 mph I never see 1700 rpms so be it.
In the 5.9 I was once able to get 315 mountain hiway miles on a tank.
With the new tranny im lucky to see 240 and it seems like the r s arr up.
Two- 2100 rpm at 70 is not unrealistic with a rack...the red one is 5.2.
Bad tranny or not. At 70 tcc engaged feels fine. At 5mph it crunches makes me wince.
I found the red one fir sale xtra cheap rear speed sensor wire was cut.
Except the crunching its super tight. And if At 70 mph I never see 1700 rpms so be it.
#38
11-22-2012, 02:30 AM
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But according to the ratio calculator its dead on. Down to its actually 2111 rpm and the road test reads just above 2100.
So I change one variable. Tire diameter.
I had a pickup with real tall tires and didnt like two things.
Changing out rear end parts and loading stuff. How ever the difference with 285' s on paper brings the rpms at 70 Down 300. You guys confirmed it . In road tests. So the way to get good mileage is to buy new, taller tires , dear....
So I change one variable. Tire diameter.
I had a pickup with real tall tires and didnt like two things.
Changing out rear end parts and loading stuff. How ever the difference with 285' s on paper brings the rpms at 70 Down 300. You guys confirmed it . In road tests. So the way to get good mileage is to buy new, taller tires , dear....
#39
11-23-2012, 04:14 AM
