Gentlemen, The 4-47 ring and pinion in my 51 F1 are well and truly past their use-by date. The axles themselves are ok though (as far as I know).
Question...Could I replace them with a Dana 3-50 set, parts #37258 and #37259 ?
Thanks for any answers.
Geoff.

 

I'm not sure what part numbers you are referring to, but these threads may answer your question:

https://www.ford-trucks.com/forums/7...hangeable.html

https://www.ford-trucks.com/forums/1...-rear-end.html

https://www.ford-trucks.com/forums/1...ange-help.html

https://www.ford-trucks.com/forums/1...dana-44-a.html

https://www.ford-trucks.com/forums/1...ar-change.html

https://www.ford-trucks.com/forums/1...-finished.html

https://www.ford-trucks.com/forums/1...nd-pinion.html

 

38 coupe. Thanks for your help, 'preciate it. I guess I'll have to look for an old f100 axle or similar. Local swap meet coming up soon.....we shall see!
Regards ..Geoff.