403 in a uts

[mmkid]

hi i was just wondering what flywheel use when putting a 403 motor in a u, i have been told that you just use the u flywheel and starter, but when i tried this the starter and flywheel werent right on. any help?
 

[molineubspecial]

What do you mean not right on? The u and g bolt hole pattern and crankcase should match rite up in your u tractor assuming you are using a u flywheel and starter if you want to use the 403 starter and flywheel you will have to grind out the housing on the tractor to exceptthe large starter and flywheel
 

[MMUBMM]

If you are using the 403 crankcase, you have to use the 403 starter and the 403 ring gear. You can use the 403 flywheel but the U flywheel will work better. Getting the 403 ring gear to fit the U flywheel will take a little work. You will have to do some grinding to get the starter and ring gear to fit in the transmission.
 

[Mopower]

If you are using a complete 403 engine in a U, you use:
U flywheel
403 ring gear
403 starter

The tranny bell may require a little clearance touch up to let the larger ring gear fit inside. You should be able to heat up the U ring gear, tap it off the flywheel, heat up the 403 ring gear, tap it on in its place. The reason for the larger ring gear is that the G starter sits a little farther out than the U.