Not all Roadrangers with push type clutches will have a countershaft brake, although they should.

Look in this manual:
http://www.roadranger.com/ecm/idcpl...n=Primary&&dDocName=RR_TRSM-0515
Page number 13 upper right picture shows the countershaft brake installed on the small PTO opening, but no air lines or button.

Do you have a picture of your transmission from the bottom side?

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-