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Old 06-01-2015, 01:29 AM
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As good as that document is... it is still vague about lockup operations. My guess would be it can happen in any gear.

It seems to indicate that a full lockup will happen at "high" speed with no definition of what that speed is. There is no mention of full lockup as it relates to gears. It does indicate throttle position is a major factor, so high speed + any throttle position = full lockup. low speed + low throttle position = full lockup.

Bottom line, you are only going to get full lockup while towing if you somehow maintain a good speed (nearly impossible with a t4r on steep grades)

The flex lockup is pretty well defined. It says it only works for decel in s4.

In D, or s5 it will work for accel in 3-5, and 4,5 for decel. The flex lockup seems to be an in between state (not what you really want to cool the trans).

Sure would be nice if they gave actual speeds and TP.
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2011 SR5 4x4, Magnuson Supercharger, ICON ET coil overs, MT ICON LT rear, MT offset lower links, URD Y-Pipe, TC UCAs, Baja Rack, MT Sliders, RCI Aluminum skids, 4.56 gearing with ARB lockers front and rear. 305/70 Goodyear MTRs (34") on Konig Countersteer 17x8. Addicted front bumper, Custom undercover tube protection rear. LT font or SAS going on next.
1989 Hilux - 22RE, SAS, hydro assist, Full Exo cage, dual ultimate cases, RCVs, 529s w Detroit locker rear + ARB front, Diamond Axle, bead locks, 40s.

Last edited by wfo9; 06-01-2015 at 01:40 AM.
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