Originally Posted by Audifirst
my point and disappointment is that a whimpy RAV 4 does it just fine w/o 4 low as did my previous 2002 WJ which by the way had a taller final drive than the 2014.
The final drive ratio has little to do with anything. Its the net ratio in reverse that is too tall in reverse on the GC. A 4 cylinder WWII Willis Jeep with proper gearing can back your boat up that hill. My little 40hp garden tractor can do it. Its the gearing, not the engine.
why won't it REV higher than 2000 RPM. Is it load or software limited? It feels like software to me.
I'm sure they are using power management to prevent you from doing what you are unintentionally trying to do....damage the tranny. If the vehicle is supposed to go 20 mph at 2000 rpm in reverse (because hi range reverse is too tall IMHO) and yet it is barely moving due to a heavy load, where is the energy going? Heat. If you could rev to 4000 rpm and your going 3mph, what is slipping? Answer: the torque converter or God forbid, the tranny. That is very abusive.
The torque converter is a very inefficient hydraulic gearbox. It can multiply the torque up to 2 times or more. Depending on the difference between engine speed and tranny speed. 2000 rpm at 0 speed is a lot of slip, 4000 rpm might damage the tranny.
I would be frustrated too. The GC reverse is too tall for heavy loads. Forcing it to the limits is a recipe for premature failure unfortunately.
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