So I'm about to try the GM part 24228787 but I'm a little confused about this casting id thing. No letter or A, B, or C. So what I'm gathering is that the casting letter or perhaps phrased as "Early" or "Late" doesn't really matter, AS long as the whole Valve Body is the same version. I.e. you cant interchange an A body parts with C body parts, BUT you can use a C casting in an early AW50/51 like my 2001 XC AWD? THE thing to note is that in the early AW valve bodies this "B5" spring should NOT be there and you should have the flat top S2 N.C. solenoid.
The ATSG guide puts it this way:
"INTERCHANGE: It is a recommended practice to use the “C” stamp valve bodies on earlier
vehicles that may have had a “B”, “A”, or “NO ID” stamp valve body installed. when using
the “C” stamp valve body it may be necessary to use the late internal wiring harness because
of the difference between the connector locations of the two linear solenoids. It may also be
necessary to have the vehicle re-flashed with the latest PCM software updates and also have
the adapts reset. The shift solenoid S2 may be interchanged as well as long as the correct
“open/closed” state solenoid is utilized. In other words a valve body from a Saturn vehicle
with the “dome” top “normally open” solenoid may be used on a Nissan or Volvo vehicle
providing the “flat” top “normally closed” solenoid is used in the solenoid S2 position, and
vice-versa.
WHAT WILL NOT INTERCHANGE: It is not recommended to interchange valve body
sections because of worm track differences in the front control valve body and middle
control valve body as well as differences in hole locations in the front control valve body
separator plate and gaskets."
So I guess my question is, the rest of the transmission must be the same? And differing early late valve bodies don't matter? Or perhaps I should be looking for a C type valve body as seems to be recommended by the ATSG manual? Is the GM part a C type valve body? I am not to worried about the wiring harness issue, just looking for the or perhaps a more reliable transmission fix considering this will be the 4th one!
Thanks if anyone has any updates or insight into this C valve body recommendation.
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