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  #1  
Old June 12th, 2012, 11:03 AM
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Ratio numbers

Looking for info from anybody running the following..

4.11's - 1.4 t-case and 34-37" tires, based on actual measurement

RPM/MPH - highway speeds

Thanks!
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  #2  
Old June 12th, 2012, 11:08 AM
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You may be able to use the Ashcroft online calculator

http://www.ashcroft-transmissions.co...atio_calc.html

or

http://www.rocky-road.com/calculator.html
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Old June 12th, 2012, 11:38 AM
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Thanks Josh I have used the Ashcroft calculator but was also hoping to get some real life numbers from somebody who has drove that set up on the highway. I just picked up a 1.4 I will be rebuilding and hold onto until my current t-case bites the dust. Wondering if the 1.4 is going to be too tall for anything under 36-37".
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Old June 12th, 2012, 04:13 PM
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4.11 + 1.4 on 35" is too tall ( I ran that for a weekend when I blew my TC and needed a replacement). On 37" it should be nicer. Jarek was technically running that in his Disco when it was a V8. He had 4.75 + 1.2 which is equivalent and he is on 37" tires. Ask him - http://njlr.org/forums/viewtopic.php?f=7&t=24

He has 4.75 = 1.4 running a Mercedes 300d engine in there now so its a bit different.
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Old June 12th, 2012, 06:05 PM
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Quote:
Originally Posted by ini88 View Post
4.11 + 1.4 on 35" is too tall ( I ran that for a weekend when I blew my TC and needed a replacement). On 37" it should be nicer. Jarek was technically running that in his Disco when it was a V8. He had 4.75 + 1.2 which is equivalent and he is on 37" tires. Ask him - http://njlr.org/forums/viewtopic.php?f=7&t=24

He has 4.75 = 1.4 running a Mercedes 300d engine in there now so its a bit different.
Thanks that was what I was looking for. I'd like a little bit more get up and go on the hilly 45MPH back roads but dont want to completely lose driveability/top speed on the highway. I will likely end up with 37's for my next set on this truck anyways so I'll slowly rebuild this case. Thanks!
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