1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,303 Posts
Welcome to Allpar. Using ATF+4 only, right? Other ATF products that don't meet Chrysler MS-9602 can damage these transaxles. It is very important to know what is put in the transaxle during service. Dexron and Mercon are bad news.
I have found that P0740 is a slipping torque converter 'lock-up' clutch (TCC) and that the front pump can be worn as well, causing this code.
P0700 is just the PCM saying that there is a code (P0740) present in the TCM.
Too many technicians got burned by replacing only the torque converter. By replacing the front pump as well, it covers all the bases. The bronze bushings wear on the pump and cause an internal 'TCC apply' pressure leak. Visually you may see some wear.
At 121K, the shop may want to replace the clutches and seals (rebuild) and go through the transaxle, even if everything is still OK. Otherwise they may not warranty the job. Call around and explain your situation. Some shops may want to drop in a reman which saves labor, but may be more expensive and unnecessary. As long as everything is clean and in good shape, a pump/converter replacement should fix this.
Rarely is this an electrical problem and is almost always an internal mechanical wear/hydraulic leak problem.
I have found that P0740 is a slipping torque converter 'lock-up' clutch (TCC) and that the front pump can be worn as well, causing this code.
P0700 is just the PCM saying that there is a code (P0740) present in the TCM.
Too many technicians got burned by replacing only the torque converter. By replacing the front pump as well, it covers all the bases. The bronze bushings wear on the pump and cause an internal 'TCC apply' pressure leak. Visually you may see some wear.
At 121K, the shop may want to replace the clutches and seals (rebuild) and go through the transaxle, even if everything is still OK. Otherwise they may not warranty the job. Call around and explain your situation. Some shops may want to drop in a reman which saves labor, but may be more expensive and unnecessary. As long as everything is clean and in good shape, a pump/converter replacement should fix this.
Rarely is this an electrical problem and is almost always an internal mechanical wear/hydraulic leak problem.