Crawl ratio

Blackdog · Feb 29, 2008

My Ranger has an automatic, stock t case, 33" tires, 4:88 gears. How can I figure out the crawl ratio with this computer?

http://www.4lo.com/calc/gearratio.htm

I don't know the first gear ratio or t case ratio for this rig. Thanks.

JFA_Spyderman · Feb 29, 2008

Yo,
According to the tech library, your tranny should have a 1st gear of 2.47 and your t-case should have a lo-range of 2.48. All these with your 4.88 should put you right above a crawl ratio of 29:1.

projectnitemare · Feb 29, 2008

You are forgetting to factor in the torque converter. I'm not sure on what a stock one will do for you but a decent rule of thumb is that it will at a factor of 1.5, so your ratio is around 44:1

Evan · Feb 29, 2008

projectnitemare said:
You are forgetting to factor in the torque converter. I'm not sure on what a stock one will do for you but a decent rule of thumb is that it will at a factor of 1.5, so your ratio is around 44:1

Not disagreeing with you...but a clutch will also "convert to torque" as well. Is there a factor for that?

Blackdog · Feb 29, 2008

Evan said:
Not disagreeing with you...but a clutch will also "convert to torque" as well. Is there a factor for that?

I don't see how a clutch can multiply torque.

Loanranger · Mar 1, 2008

Clutches have nothing to do with your crawl ratio, because they are not multiplying revolutions, merely transmitting them. Apparently torque converters can add a hydraulic reduction which is generally considered 2:1.

Crawl ratio

Blackdog

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JFA_Spyderman

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projectnitemare

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Evan

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Blackdog

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Loanranger

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