94Discovery Posted January 6, 2013 Share Posted January 6, 2013 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 . Quote Link to comment Share on other sites More sharing options...
94Discovery Posted January 6, 2013 Author Share Posted January 6, 2013 Please delete for some reason it posted twice Quote Link to comment Share on other sites More sharing options...
dirtydiesel Posted January 6, 2013 Share Posted January 6, 2013 High ratio diffs from HoFS? Quote Link to comment Share on other sites More sharing options...
94Discovery Posted January 6, 2013 Author Share Posted January 6, 2013 Yep i thaught about that but still my rpm wont go as much i would like. Quote Link to comment Share on other sites More sharing options...
94Discovery Posted January 6, 2013 Author Share Posted January 6, 2013 You know i did the math again and it make sense with 5.99 diffs rpm at 100 km/h is 2470 And it is a less expensive solution but i still like to know if there is a possibility of an overdrive. Quote Link to comment Share on other sites More sharing options...
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