Has anyone ever put a bigger input shaft into a NP435 or a Borg and Warner T-18. Right now both are the stock 1 1/6 10 spline input and I am looking to go a 1 3/8 10 spline if that is possible. any input is much appreciated

Thanks
Dave

TA knows more about this than I do and will comment, but I'm thinking a NP435 from a medium duty truck has a bigger input shaft.

im pritty sure alen is right one of my buddys pit a big input in his truck but not sure what he used

The input shaft in the F-500, F-600 NP435 is 1-3/8" 10 and they will interchange from 435 to 435 not sure about T-18, the bigger shaft is what I have in the Stressed Out truck and it came out of an F-500. Walt

If you get the input shaft from a med. duty truck, make sure you get the candle stick to go with it.

Alan

what about the length of the input shaft? did you have to cut it down or anything

I don't recommend cutting the shaft, what I did when I built the truck was I made a 3/4" thick block saver plate and made a pilot bearing to fit my crank and shaft this put everything back to the right dimensions, you also have to use a different throw out bearing assembly or at least change the throw out center hub, take some measurements and if by chance the difference is minute then I don't see a problem with trimming the shaft. Walt