now when i have a not moving 37 at the start , i write the timetable on a paper ( number and time and make the tiny 31 as new loco ( replace 37 )

( before i make a copy of the timetable originaly )

yes is a lower engine , 8 waggons .... i will see a perform on a mod route .. 4-8 cars

thx both

Yes, the class 31 is slightly slower than the 40 or 37, but it can quite easily keep to time on the 8 car North Landon express services if you want to drive it there. These are the services I tested it on, alongside some of my own services on private routes.

ok

I'm sure it can substitute a Class 37 or 40 without a problem

replace ist ok, but i have a better feeling and morefun with a new train in a timetable in a route.

replace the loco with this loco in a timetable are other Parameters , the new loco can faster or slower to the timetable entry .

thx for answer , but i wait for new trains ^^

You can just edit an existing timetable and replace a loco in any of the trains with this one (that's what I did). It's quite easy.

oh a new Diesel ... nice...
is a timetable or / and route for this or with this Diesel ?

Aw yeah! This has always been one of my fav british diesels! Thank you, it's amazing!