Upgrading Eaton RTLO Trans

Truck came with a rtlo 16918b
About to pull the trans and do a clutch. While the trans is out, i will be upgrading Trans. For a Genuine Eaton remanufacture RTLO 18918b with core the price is 5300 bucks from peterbilt. Any reason not to jump up to a 20918b? IS there a big price difference or is there such thing as too much transmission? IS the shifting a little more notchier with stronger gears? All the rtlo 18's are a DIRECT SWAP. So just curious.
i plan on upgrading to a c15 in the next 2 years just fyi and my truck is a sever duty construction vehicle and always in soft material. What clutch do you recommend as well.
Thank you for your time and i truly appreciate any insight you good people have.

 

Thank you sir for the response! Yup, i asked a buddy of mine that has 2 trucks. One with a 14l detroit and the other with a 15l cummins. Both trucks have the 16. So im sure its a stout trans. My dilema is, i fear that something internal in the trans is bad. Shifts great and drives great but something in there is bad becuase there is obnoxious rattle noise in the main or countershafts. Sure it could be input shaft but not so sure. I bought the truck second hand and i think the driver was rough on it becuase it was a company truck. Ill know for sure when i get her out and check the components. But in the mean time im steering towards it has issues. Trans was already rebuilt a few years back and i dont like that route. People cut corners to save on cost. Was reading that eaton dynos all their rebuilds before they leave the manufacture. So if a new one is going in, its only a few bucks to upgrade

 

Also about the easy pedal eaton. SChool me on it. Im trying to figure how a easy pedal could stand up to severe duty. One would think you would need a heavy clutch that requires 2 legs to press her in

 

and i thank you again sir!

 

wow thanks for this! Wish they stayed that clean and nice looking. Does instructions come in box or do i download on eaton website? Whats that cost? about 1000 bucks?
I noticed my cross shafts are all loose in the bores. So ill probably need a bunch of things when i tackle this job.
So much to do when i drop the trans. I know the flywheel is warped so ill have to get a new one of those. Obviously do the main seal even though its not leaking,
rear motor mounts. anything else i can easily get to. This is why im doing myself. Shops do stuff half assed and milk the labor. I enjoy big jobs and take my time and dont cut corners. Quality work