Code P0740 and the 42LE in an LH Body
#1339268
11/21/12 11:57 PM
11/21/12 11:57 PM
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Joined: Apr 2004
Posts: 2,415 Connecticut
Ron_M
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Got the pretty check engine light to come on today in my 2000 LHS. After the key dance and getting P0700 and P1684 for codes I had my friend hook up his Snap On scanner to read the TCM and got code P0740. During a road test, the torque converter locked at @55 MPH and all gears were available. Fluid is good ~2 years old and is ATF+4 and level ok. Speedo works. So I'm ruling out the speed sensors and solenoid. Trans was not in limp mode. Googling P0740 and reading DodgeIntrepid.net didn't yield much but one really good post alluded to (1)Faulty torque converter clutch solenoid valve (2) Torque converter clutch solenoid valve harness or connectors (3) Torque converter clutch solenoid valve circuit is open or shorted. One possible cause is debris in the valve body and that a flush and refill (with ATF+4) might work or that the debris will work itself out if that's the case. I'm thinking the car is telling me to start saving and that a failure is in the cards. The trans has 124K so I realize that.
Can anyone offer some additional info? Is it early enough I buy time with this? The flush is probably the cheapest trick, but if the bands and clutches are going, will I be wasting $$? Anyone install a Mopar Reman lately? Any good? Thank you in advance.
Common sense is a flower that does not grow in everybody's garden
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Re: Code P0740 and the 42LE in an LH Body
[Re: Dakota_Don]
#1339271
11/23/12 08:26 PM
11/23/12 08:26 PM
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Joined: Jan 2003
Posts: 6,816 Alton, IL
Dakota_Don
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master
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Alton, IL
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Quote:
p0740
1. While driving 55 MPH on a flat road, slightly depress the brake pedal enough to kick the Torque Converter Clutch (TCC) out. The RPM should rise about 200 RPM.
2. Release the brake pedal and the RPM should slowly drop about 200 RPM.
3. If it shudders or slips, change the fluid and filter. Install ATF+4.
also add a TQ converter shudder additive..
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posible causes 2000 Chrysler LHS 3.5L Test Details... Confirmed Fix Details...
Incorrect Fluid Torque Converter Transmission 8 - Torque Converter 5 - Automatic Transmission Fluid 4 - Automatic Transmission 4 - Automatic Transmission Service 3 - Automatic Transmission, Torque Converter 1 - Spool Valve, Torque Converter 1 - Automatic Transmission Filter, Automatic Transmission Fluid, Automatic Transmission Service 1 - Automatic Transmission Filter, Automatic Transmission Fluid 1 - Fluid
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Re: Code P0740 and the 42LE in an LH Body
[Re: Dakota_Don]
#1339273
11/23/12 08:29 PM
11/23/12 08:29 PM
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Joined: Jan 2003
Posts: 6,816 Alton, IL
Dakota_Don
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master
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Alton, IL
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Reported Fix Details Confirmed Fix Jim Tupper January 06, 2011 2002 Dodge Intrepid, SE 3.5L, Vin V * Torque Converter - a new torque converter repaired vehicle Torque Converter Ed Beaulieu June 16, 2009 2002 Chrysler Concorde, Limited 3.5L * Torque Converter 89,000 miles Torque Converter 8812PROFAST October 17, 2011 2002 Chrysler 300M, Special 3.5L, Vin K, USA/Canada * Automatic Transmission Automatic Transmission Filter Automatic Transmission Fluid - Customer stated that the car shifted hard and made a clunking noise. She also stated that the check engine light was on. Had P0700 and P0740 stored. Verified that the torque converter was locking up using scan tool. Performed a transmission fluid flush and it DID correct the problem. Automatic Transmission, Automatic Transmission Filter, Automatic Transmission Fluid Rod Posner June 26, 2009 2002 Chrysler Concorde, LXI 3.5L, Vin M, USA/Canada * Automatic Transmission Torque Converter 55,513 miles Automatic Transmission, Torque Converter
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Re: Code P0740 and the 42LE in an LH Body
[Re: Ron_M]
#1339275
11/23/12 11:53 PM
11/23/12 11:53 PM
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Joined: Apr 2004
Posts: 2,415 Connecticut
Ron_M
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If 20 miles on the flush is insufficient, can the TCM codes be cleared using an Actron CP9180 scanner? I know the Snap On and DRB3 can clear them, but I was unable to do with the Actron.
Common sense is a flower that does not grow in everybody's garden
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Re: Code P0740 and the 42LE in an LH Body
[Re: Ron_M]
#1339276
11/24/12 05:56 PM
11/24/12 05:56 PM
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Joined: Jan 2003
Posts: 6,816 Alton, IL
Dakota_Don
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Alton, IL
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the scanner should clear the codes, if not unhook both batt cables, touch them together for a few seconds and that will erase the codes.. also try Dr, Tranny.. its in a red tube, it may help, you can get it AZ or other part stores http://www.lubegard.com/~/C-230/Dr.+Tranny+Instant+Shudder+Fixxi wanna say the last time i had this code, i pulled the VB and sol pack.. and replaced them with re-man units.. but its been a while..
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Re: Code P0740 and the 42LE in an LH Body
[Re: Dakota_Don]
#1339278
11/24/12 11:10 PM
11/24/12 11:10 PM
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Joined: Apr 2004
Posts: 2,415 Connecticut
Ron_M
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OP
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Connecticut
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How likely is it that it's the TC? - Did not drive the car today.
Common sense is a flower that does not grow in everybody's garden
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