Re: towing horse trailer with tundra
My Tundra's Owner's Manual, "Automatic Transmission (h) Good driving practice," pg. 100, says to tow with O/D off, "When towing a trailer, in order to maintain engine braking efficiency, do not use overdrive." It also says, "If the transmission repeatedly shifts up and down between third gear and overdrive when climbing a gentle slope, the overdrive should be turned off." So, I always tow with O/D off. In any case, driving in 3rd is no problem. The engine is just humming along around 3000 rpm at highway speed. The Owner's Manual only gives gear and speed limits for 2nd and "L," and the max allowable speed for 2nd is 75 mph! Some folks who've checked their gas mileage towing have said that they get better mileage with O/D off. Maybe the excessive shifting between 4th & 3rd, and the driving in 4th with the torque converted unlocked is the reason.
Ken
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S&S Long Tube Hi-Torque Headers
TRD/Eaton Limited Slip Differential
Gibson exhaust system
Hellwig Rear Antisway Bar
Sylvania Xenarc H.I.D. X1010 Auxiliary Low Beam Driving Lights
Schaeffer Engine Oil, ATF, Differential Oil
Racor LFS22825 full-flow transmission filter
Towing a 21' Bigfoot trailer using a Hensley Arrow hitch, Jordan brake controller, McKesh mirrors
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