When it is in tow haul mode it will shift at much higher then normal rpms that Depending on how heavy your trailer is , I would advise you to try towing it without using the tow haul mode and see how it does .
Some people have said they do fine without it , if your pulling on flat roads you should be fine with this feature off .
Here is a link to a thread about towing a 9500 lb trailer and his experience .
Towing Report: '07 Tundra + 35' 9000 lb trailer
Welcome to the forum , hope this helps you ?
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2008 Crewmax X-SP
carbon Fiber Dash kit
20" JTI Rims
BFG AT KO 285/55/20
AFE C.A.I w/ Dry Pro filter and the AFE Mod
Blacked out Headlight Mod.
Flo~Pro muffler #744
Toytec 3" front , 1" rear blocks and Diff. lowering kit
