HELP! SES transmission code - what caused it?
06-15-2004, 01:40 AM
#1
HELP! SES transmission code - what caused it? P1870 Internal Transmission Component Slipping
"This code is often set due to overheating inside the transmission. Extended periods of stop and go driving may also cause this code. Common symptoms associated with this code are harsh shifting from first to second gear and/or no overdrive or fourth gear. These symptoms are caused by an increase in transmission pressure in order to compensate for the internal slippage. Sometimes a complete transmission service including a fluid flush and refill can remedy this problem. In extreme cases, a transmission rebuild or replacement is required. "
I got this while in cruise control doing 65 mph for about 10 miles after installing a PT4400 converter. My trans is fresh and tight. I have a huge trans cooler. Nothing feels wrong and fluid looks new. Could the PCM be feeling the increased line pressure from my shift kit and while the converter was slipping while in cruise control?
Anybody have this before?
"This code is often set due to overheating inside the transmission. Extended periods of stop and go driving may also cause this code. Common symptoms associated with this code are harsh shifting from first to second gear and/or no overdrive or fourth gear. These symptoms are caused by an increase in transmission pressure in order to compensate for the internal slippage. Sometimes a complete transmission service including a fluid flush and refill can remedy this problem. In extreme cases, a transmission rebuild or replacement is required. "
I got this while in cruise control doing 65 mph for about 10 miles after installing a PT4400 converter. My trans is fresh and tight. I have a huge trans cooler. Nothing feels wrong and fluid looks new. Could the PCM be feeling the increased line pressure from my shift kit and while the converter was slipping while in cruise control?
Anybody have this before?
06-15-2004, 09:00 AM
#2
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Since this is right about a new converter install
I would reset it and wait for it to tell you twice.
It may just be that the new converter TCC needs
a lot more pressure to hold, than the old one (my
TCI 3000 slips way more than stock) and you just
went over some delta limit as the PCM trans
routines were learning new TCC PWM slip-vs-load
profile.
I would reset it and wait for it to tell you twice.
It may just be that the new converter TCC needs
a lot more pressure to hold, than the old one (my
TCI 3000 slips way more than stock) and you just
went over some delta limit as the PCM trans
routines were learning new TCC PWM slip-vs-load
profile.
