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When To Shift?


Fascinating spreadsheet ! Kind of hard to read the sheet and graphs on my phone , when I get to real computer , I'll print them out .

Not surprisingly , as illustrated in this thread, the biggest factor is personal preference . Really flat torque curve w/ 220-225 ftlb from 2200-3500 is very forgiving . Unless you are towing @ max GCVW or drag racing where you need max HP , it's uncritical .

Just to put into context , even @ 1000rpm , the 4.0 ohv is putting out 20% more torque than the 3.0L . With my '91 Explorer ( 4x4, 3.73 ) I've just left it in Drive and never felt shortchanged . Now with my Ranger ( '94 2wd, 3.0L , 3.42 ) I suspect will be a different experience .
 
when chunks of metal start coming out the tail pipe, it's time to shifto_O
 
if want just go to the store let the transmission do is thing, it shifts at 2500rpm. in town and keeping up 3k, wanting to hosre about 5500rpm and tearing out of stop lights.
 
9 grand..... If you have to shift before that you didnt build the motor good enough.
 
I see that I'm about 13 years late for this but I have a 1991 4.0 and when I'm daily driving and trying to save fuel I usually shift around 2k rpm but when I'm trying to pull away I'll ride it to redline which is about 5k
 
I also have a shift question. 2009 Ranger 4x4 automatic. When Im hauling my scrap trailer, do I need to shift down to 2 or 1 when taking off. There won't be any hills.
 
I also have a shift question. 2009 Ranger 4x4 automatic. When Im hauling my scrap trailer, do I need to shift down to 2 or 1 when taking off. There won't be any hills.
I would leave it drive with the "tow/haul" button activated.
 

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