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Overdrive for lt230 and an auto transmission


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Hello All

I am doing a volvo portal conversion on my 94 discovery and i need an overdrive

After using Ashcroft calculator i ended with 3500 rpm at 100 km ,i have the 7.14 c303 axles.37inch tires.

If i use the 1/1 tcase conversion i will drop to 2950rpm .

I contacted roamer drive and and they said that there kit is not compatible with Ashcroft 1/1 and it is not compatible with auto transmission.

Any idea how to resolve the problem without changing to R380 ?

Thank you

Naji M .

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