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I just bought a 2000 Acura 3.2TL with 123K miles on it. Before I took it to get it smoged (emissions test in cali) I scanned it to make sure all the Emissions monitors where ready and they were. Than even though the CEL was not on I scanned it for codes and it gave me P1740 4th gear pressure switch fluid flow or something to that effect, I dont remember the exact description.

Searching around on this forum I know it seems to be a common fault code on these cars and it usually means a dying transmission, my question is, to me the transmission shifts pretty much flawlessly I cant get any thumping or jolting in any gear no matter how I drive it...I have checked the ATF and its pinkish to light brown and doesnt smell burnt at all... So what are my chances of or I guess how long can I prolong the life of this transmission if I replace the 4th gear pressure switch and do a 3x3 D/F on it!

Should I not waste any money on this? I can probably get close to my money back if I resell it even with this cel since I got the car cheap.

All advice appreciated,
thanks

one last thing I erased the code to see how soon it comes back and have driven it for about 80 miles and it still hasnt come back.
 

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Given that the fluid looks good, I probably wouldn't do the 3x drain and fill just yet, especially since it looks good and doesn't smell burnt. I mean, you can....it's certainly not going to hurt anything, but since the CEL hasn't resurfaced and no other diagnostics have been done, start simple and cheap with a little testing.

Here's a relatively easy test. Measure the resistance between the 4th clutch pressure switch connector terminal and body ground. If the resistance is 10 M or more, check for loose terminal fit in the PCM connectors (or the problem may be intermittent at this time). If not, replace the 4th clutch pressure switch.

By the way. if the transmission feels like it's hunting for a gear at speeds under 50 MPH, drive in D4 around town, and shift to D5 on the highway. Many owners do this.
 
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