I forgot to ask but I assume you are talking about a Deere 1010 with the Twin Disc reverser. When rebuilding - you can check your work with compressed air. With the assembled reverser on the floor and the control valve not yet installed - you can blow air into the one of the three oil-
delivery tubes to check -while you turn the input shaft. Center tube is for "lube" and "release."
What PSI are you reading in the lube-release port with the engine running?