fmx auto into 351 f250 4x4 ?

Joined: 21 Aug 2005 Location: capalaba qld

hi just wondering if anyone knows what changes i will need to make to convert my v8 f250 4x4 fron C4 auto to FMX AUTO ??? would it just be a matter of bolting str8 up ? as i have a fully recon fmx sitting gathering dust

Joined: 09 Apr 2003 Location: Carrum Downs V Posts: 3330

Won't it be a C6 in your truck? Removable bellhousing, alloy case is C4, fixed bellhousing alloy case is C6, and removable bellhousing, iron case is FMX. Unless it does not much work, or you really can't afford to rebuild the C6, and it is completely stuffed, I would steer clear of the FMX.

Is it 4x4? It is not divorced transfer? You will find it hard to get an adaptor for the transfer, and the spline count may be wrong.

Joined: 03 Feb 2006 Location: medowie

Pretty sure there's no C4's in 4x4's, only C6's
And C4 is heaps tougher than FMX anyway

Joined: 21 Aug 2005 Location: capalaba qld

my f250 is remote (divorced transfer) so how hard is it to change to C6 ?

Joined: 28 Dec 2006 Location: brisbane

some f trucks did have a c4 with a np but are rare as rocking horse crap

Joined: 09 Apr 2003 Location: Carrum Downs V Posts: 3330

nottie wrote:

some f trucks did have a c4 with a np but are rare as rocking horse crap

I thought it was only EB's, not F trucks. Not in the 70's anyway.

Joined: 19 Feb 2007 Location: lockridge

the fmx is old, and quite weaker than your other options.
if you are going to be using a secondhand one it probably wont last that long anyway and aftermarket parts are getting a bit thin