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  #1  
Old January 17th, 2013, 12:55 PM
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John Crouse
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School me on LT230s

How do you tell if an LT230 is a 1.2, 1.4, 1.6 etc.

Assume the 1.4 is the best fit for 110 3.9 V8 with an R380.....
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  #2  
Old January 17th, 2013, 01:05 PM
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Chris Baldewin
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Look up the serial number on Ashcrofts site. Very bottom of link.

http://www.ashcroft-transmissions.co...d&productId=45
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Old January 18th, 2013, 08:14 AM
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Jamie Austin
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Quote:
Originally Posted by 61rover View Post
Assume the 1.4 is the best fit for 110 3.9 V8 with an R380.....

Depends on tyre size.

I have a 1.2 in my 110 (Td5, ECU & turbo upgrade to 190bhp) and it pulls it very nicely with 235/85s. If it put my 255's on (BFG MT) then it's like pulling away in 2nd instead of 1st and Steep hillstarts it pays to slip into low range.

But for highway driving, with the 235's and 1.2, its great. makes things a bit quieter.

Generally (but not always) the boxes were fitted thus:

2.5 NA diesels, 2.5 petrol 1.6:1

2.5 TD 1.4:1

200Tdi, 300Tdi, Td5, 3.5 V8 carb (110) 1.4:1

3.9 EFI "50th anniversary" and NAS 3.9/4.0 1.2:1

UK/euro V8 90 (3.5 carb) 1.2:1 (118 or 127bhp on a 1.2.... )

all 2.4/2.2 "puma" 90,110 and 130 1.2:1 (although they have the 6 speed 'box, with lower 1st and slightly higher 6th)
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Old January 18th, 2013, 10:28 AM
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Buck
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Go here:

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

Play around with the numbers and find what works best for you. If you want to be really accurate, don't measure tire hight, measure the tire under the wheel, double that, and add the wheel. That will give you your true rolling radius.

If you are under powered, find out what your torque curve looks like and take that into consideration. It's an awesome tool that Ashcroft put together.
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