1948 Cub

[Jahenderson1]

Need some expertise. I have a 1948 Cub that has transmission (bearing and gear) issues...casting code 351530-R1. Is a transmission with a 351530-R6 a direct replacement?

[Barnyard]

Yes, The R number signifies there were changes made. R6 means it was revised 5 times since the R1 cane out.

[Jahenderson1]

Thanks. I am replacing the the seals/gaskets and going to install it. Got a good deal on it.... Bought the tractor from a place where it had been sitting a long time...R-1 gears rusted and pitted....rear counter shaft bearing shot.

[Glen]

Hi,
There were changes inside the transmissions between the R1, and R6 trans part numbers.
The rear clutch shaft bearing was changed, from a roller bearing to a needle bearing. The OD of the bearings is different, so the holes in the housings are different also.

The 2nd speed gears were changed also, they have different numbers of teeth.

Below are pages from the Cub parts manual showing the changes. It gives the tractor serial numbers when they were changed.
Maybe you aren't taking them apart, but some info so you will know there were changes.

http://www.farmallcub.info/manuals/cub_ ... 007-08.jpg

http://www.farmallcub.info/manuals/cub_ ... 007-09.jpg

[Jahenderson1]

Thanks, folks.....good information. The clutch shaft front bearing seems a little noisy to me on the R-6....think I'll change that out. Everything else seems as smooth as silk.

[Don B.]

Smooth as silk? Maybe that transmission is not for a Cub...

[Stanton]

Thanks, folks.....good information...

Yep, lots of good info on here. Welcome!

Take some time and read through a few threads to acquaint yourself with the Forum:

• Welcome Wagon
• How to Upload Pictures to a Post
• Forum Picture Posting And Other Interesting Things You Can Do
• Using the Forum

Now that you have 2 posts, you can access all the free PDF downloads in the Manuals section. They are located via "Quick Links" in the upper left corner of your screen. Hit that and a pull-down appears where you'll find "PDF Manuals". Through that link, you'll be able to download an Owner's Manual (very strongly recommended) and any service manuals that interest you. You'll be able to familiarize yourself with your Cub more quickly. Implement Manuals are also available.

Might also enjoy reading through this thread: What to do with a Cub you just brought home

Would encourage you to join in at the Shallow Creek CubFest this Friday and Saturday in Harrison, OH. Here's a link to it and articles on what a CubFest is all about:
http://www.farmallcub.com/phpBB2/viewforum.php?f=8

Take some pictures of your tractor and post them. We’d like to see it.

Glad you joined us.

[Jahenderson1]

Well....smooth as silk, relatively speaking.....lol.....