Clunky gear change on 463 auto

the quality of gear change on your g/box is controled by a vacuume modulator valve this is located on the lower left hand side of g/box but first check vac to unit if no vac determine vac supply fault, but if ok take off rubber cap prize out T pin (gently and only enough to clear key way to roughen change wind in, to smoothen change turn out only adj 1/2 a turn at a time) allways refit rubber cap this is important. this adjustment is set at the dealers using a g/box oil pres guage but can be done this way road testing each adjustment and checking g/change quality. If you are still having difficulties you are welcome to message me
Regards Terry