M1078 Transmission issue/question

[alwayskaos]

Hello all...
I have a 1998 M1078 that seems to be having a transmission issue. Can someone please let me know what transmission I have, either WTECII or WTECIII?
Its putting out a code 5517, and from what I can tell, its most likely a trans oil temp issue, too cold. I'll be changing the fluid to ATF this week, so that may help it to warm up better, but I do not know which model the trans is. Thank you!!

 

[Ronmar]

Well they started incorporating the wtec3 mid 98. Is the display on the control pad wide/rectangular with blue-green color display, or is it narrow/square with red characters? Wide green display = 2, narrow/square display = 3…

This is a C3 pressure sw fault. i see the note about possible issue below 50F. This could be the case, but ATF probably won’t help it warm up, it is simply thinner and will pump better at lower temps… am I to assume that this is only occurring when cold? You could help the trans warm up by using the cold weather warmup procedure. As soon as you start the truck, select D or R and elevate the idle slightly with the hand throttle… this will put fluid thru the torque converter which warms it, and apply load to the engine which also warms it up quicker. The A0 trucks basically send all their engine heat to the transmission untill it becomes a heat source, so the quicker you make it a heat source(put it in gear) the quicker both the engine and transmission warm to proper op temp…

 

[alwayskaos]

Thank you Ronmar for taking rhe time to ezplain. Looks like I have the WTECII. I havent had the time yet to run it, but this weekend, Ill follow the proceedure you mentioned.