Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I am sorry your having this problem
when taking off from a stop is this going into neutral so to say when its supposed to be in 3rd gear or while in 3rd gear ? or 4th gear for sure ?
the P1870 code is a code stating there is internal slippage inside the transmission when the TCC is locked up
ok the 1870 is saying there is something slipping inside the transmission which is what you are feeling when it acts like its going into neutral
the problem is going to be something like the 3-4 clutches inside the transmission or possibly the torque converter causing this issue
either way i am sorry to say this transmission needs to come out and apart to be inspected as to what exaclty is failing causing this but it is 100 % something inside the transmission failing
how are you making out ?