New owner -- got a P1774 code for trans

[Gearheadvr4]

Had my first major issue. What I thought was a relatively trouble free car does have a trans issue. Got a P1774 code for the trans. LOW COAST BRAKE SOLENOID VALVE FUNCTION. When coasting at around 55 to 60 mph the trans slipped and seemed to downshift suddenly and the RPM spiked very high. Thankfully I was pretty quick and shifted into neutral. The engine never shut off during this and ran fine. It would run fine and drive fine for a while then bam downshift and high RPM. This happened two more times before I could make it home. Also got a pending P0420 for powertrain which may or may not be related.

The G35 has a lot of miles with 180K. The car overall is still in good shape minus a couple of cosmetic things and of course the transmission. The engine checked out and runs great. I got an amazing deal on it, hard to pass up.

Some other things that do need worked on is the drivers seat and the front bumper. The front bumper is barely hanging on. It seems the only thing holding it on are the screws on the top behind the radiator. Everything underneath is missing. No engine splash guard attached to the bumper, no fender liner, ect. Does anyone have part numbers for everything that holds the bumper on?

The drivers seat is worn and has some tears. I got a quote to get it repaired and it was a sticker shock. Not sure what my options will be there. Coming from a 3000t VR4 those guys can get complete replacement leather and just recover them. I haven't found that option for the G35. I'm guessing maybe because of the perforated leather for the heater?

Surprisingly everything else works. Windows, stereo, cd, cruise, AC, ect. Haven't found anything at all that needs attention. It doesn't seem like a 180k car other than the wear on the trans.

Any help you guys can give would be great!

[audtatious]

Congrats on your purchase. Go through the FSM for the P1774. Was there any maintenance records with the car? Wonder when the last time it had normal flushing.