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3L80 Engine RPM

jwaller

Active member
3,724
19
38
Location
Columbia, SC
my tach shows about 3300. I feel comfortable doing 60(3500) with mine but I have the bias tires. I suspect with your radials you can do 62-65.

I'll soon have my radials so I can give you another reading.
 

gizip

New member
16
0
0
Location
Tappahannock, Va.
I have a tach in my Humvee. With radial tires, it is running about 3000 at 60mph. I installed a 700R overdrive and the rpm drops to 2200 at 60mph in overdrive. Wayne Walker
 

usmc81301

Member
156
1
18
Location
Bayfield CO
Thanks for all the info. Is the 700r4 a better deal than a 4l80e? I don't mean in terms of labor, but is it basically an equivilant?. I spent the money to put a 6.5LTD in and I want to treat it nice. Second I would be interested in getting a tach, thanks for the heads up.
 
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