Dodge Sprinter 2006 Manual page 1855

VA AUTOMA TIC TRANSMISSION NAG1 - SERVICE INFORMA TION 21 - 117
Shift Valve Holding Pressure
Fig. 116 Shift Valve Holding Pressure
1 - HOLDING PRESSURE SHIFT VALVE
Th e h oldin g pr essu r e sh ift va lve (1) (F ig. 116) is
a ct u a t ed by t h e pr essu r es pr esen t a t t h e en d fa ce in
t h e a ct u a t or s a n d a spr in g. It a ssign s t h e wor kin g
pr essu r e (p-A) t o t h e a ct u a t or wit h t h e h igh er pr es-
su r e (t a kin g in t o a ccou n t t h e spr in g for ce a n d t h e
effect ive su r fa ce a r ea ). Th e ot h er elem en t of t h e sh ift
gr ou p is t h en u n pr essu r ized. Th e va lve swit ch es over
on ly du r in g t h e sh ift ph a se a n d on ly a t a cer t a in
pr essu r e r a t io bet ween t h e over la p pr essu r e (p-Ü)
a n d t h e sh ift pr essu r e (p-S).