C70 Tranny issue, help appreciated

Jonc123 · Post by **Jonc123** » 18 May 2018, 02:05

Just bought a clean 2004 C70 with 110k miles. The tranny slips and downshifts hard when hot. CEL is on and reading codes p0740 and p0785. OD arrow is also flashing. Anyone know what could cause this. Im hoping to not have to replace the transmission. Any help would be appreciated. Thanks!

Post by **MadeInJapan** » 20 May 2018, 10:34

Another tranny post- same advice here as the other- to do a drain and fill of the fluid. Only about 2 quarts will come out of the pan but put that much back in...over the next few weeks do a few more of these. Make sure and use the correct fluid! Not sure what the codes mean. P0740 is really a valve body code...I know others have rebuilt those on other Volvo's but not sure on ours. Might not be that bad though so would be worth searching. I believe the other is a "shift circuit" code which could show up from the first one- at least these are my thoughts.