No, NP-540 series are truck transmissions, look just like a 435, but with one more gear. Al top cover, 4 shift rails, came in GM, Ford, Dodge, IHC, forklift trucks. Long and short input shafts for 11" and 14" clutches. Rarely come with OD, but, if so, at the expense of larger gap in ratios, OD came from 3rd gear location, hard to go from second to fourth with a load.

Google 'New Process 540 transmission.'

A T-5 probably would not be a good choice for a hard working truck.

Ed

Last edited by EdPruss; 05/13/2016 1:02 PM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.