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Rustybronco 11-11-2007, 10:30 PM My brother is wanting to install an overdrive transmission into his '89 Dodge 250. It has a Cummins with a 727. I suggested installing a Allison but I can't find who makes a adapter to do this. I have heard several people talk about it on here but know one says who makes the adapter. Can anyone help? dmerre89 11-11-2007, 10:47 PM talk to "brayden" he's put one in a 24 valve with a stand alone tcm. KEVINL 11-12-2007, 09:14 AM the best bet would be a AT545 and get a 5.9 SAE #3 bellhousing Brayden 11-12-2007, 09:20 AM No way.. AT has no lockup and is NOT and overdrive trans. You would however be able to use the SAE #3 bellhousing if you wanted. Otherwise call Suncoast Converters and ask about their billet Allison conversion adapters. Brayden Rustybronco 11-12-2007, 06:14 PM Thanks everyone. KEVINL 11-12-2007, 07:08 PM No way.. AT has no lockup and is NOT and overdrive trans. You would however be able to use the SAE #3 bellhousing if you wanted. Otherwise call Suncoast Converters and ask about their billet Allison conversion adapters. Brayden What is 4th gear 1:1 DURAtotheMAX 11-12-2007, 09:04 PM What is 4th gear 1:1 Yes I beleive so... Brayden 11-12-2007, 10:32 PM :exactly: | ||