P1870 Code ?
Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 813
Likes: 13
From: Hampton Va
P1870 Code ?
Help, I went from 3:15 gears to 3:73 gears, car is running great but on interstate when i stomp it while in 4th gear it downshifts to what i think is 1st gear. cause the rev limiter comes on real quick , then the check engine light comes on with this slipping code, I went back to my tuner and reset the wot shift points, but its still kicking down and throwing this code.So could my tranny or converter be bad within 100 miles already? or is this something that you just keep playing with untill you finally get the wot shift points right?I did all sorts of gear reading and serching on here for a year before i did the swap and never heard of gears killing a perfectly good tranny before, thanks for the long read im just puzzled and worried....
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 179
From: S.W. Ohio. . . . . . NRA Life Member
Help, I went from 3:15 gears to 3:73 gears, car is running great but on interstate when i stomp it while in 4th gear it downshifts to what i think is 1st gear. cause the rev limiter comes on real quick , then the check engine light comes on with this slipping code, I went back to my tuner and reset the wot shift points, but its still kicking down and throwing this code.So could my tranny or converter be bad within 100 miles already? or is this something that you just keep playing with untill you finally get the wot shift points right?I did all sorts of gear reading and serching on here for a year before i did the swap and never heard of gears killing a perfectly good tranny before, thanks for the long read im just puzzled and worried....
There's a missing program change on your tuners part. Has to do with a table that holds the values for the TCC slip numbers. Have him do it right !!!
