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I have a 4BT and would like to adapt to M37 NP420
Posted: Mon Apr 12, 2021 12:02 pm
by graystonlicht
I am looking for some experienced advice on how to adapt a 4BT diesel to the NP420 transmission on an 1954 M37. I have looked around the internet and have not found much information. Most people change out the transmission to something like a NV4500. I rather not, and looking for an adapter or direction to who can do this. The engine has already and NV4500 flywheel housing.... first post so greatly appreciate all comments.
Re: I have a 4BT and would like to adapt to M37 NP420
Posted: Mon Apr 12, 2021 10:15 pm
by Cal_Gary
Welcome to the G741!
Send a PM over to Charles at MSeriesRebuild here on the forum. His life's work is on these military vehicles to include diesel swaps. He should be able to help.
Gary
Re: I have a 4BT and would like to adapt to M37 NP420
Posted: Fri Apr 23, 2021 8:07 am
by Juan
Don't waste time adapting a 4 speed tranny to a 4BT engine that tops at 2800rpm. Get yourself an OD tranny that bolts up to the 4BT and be happy.
I would go with a ZF 5S42 from a ford diesel or a Spicer 3053A from the deuce
Re: I have a 4BT and would like to adapt to M37 NP420
Posted: Fri Apr 23, 2021 8:38 pm
by PoW
I used the Spicer 3053 trans with the 16% OD behind a Detroit 3-53. Cruise @ 68 with that combo, and the winch PTO is on the correct side.
PoW