Hi Master Tech Tim,
I took the Suburban to the Auto Zone and they pulled the code - P1870-
Transmission is in 4th gear with TCC engaged and the ECM has detected excessive slippage whn comparing the input shaft speed with the output shaft speed.
I checked the fluid level last night and I'm wondering if I've got it full enough. It's really hard to see the hash marks on the dipstick. It appears that the "Hot engine Level" is almost 2-3 inches up from the bent part of the dipstick. Does that sound correct? Maybe I've kept the level WAY too low.
If it is the solenoid you mentioned, is this something my husband can do?
Thanks so much for the help!
Thursday, March 6th, 2008 AT 12:13 PM