05 48re torque converter locking up - Dodge Cummins Diesel Forum
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post #1 of 10 (permalink) Old 01-17-2020, 12:40 PM Thread Starter
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05 48re torque converter locking up

This has happened twice now and I have absolutely no idea what could cause this.

When I first leave my house in the morning to head to work, Iíll get about 200 yards or so down the driveway (about 15mph) and for lack of better way to put it. My truck acts like I have a manual and I shifted it into way too tall of a gear and then wonít release until I put it in neutral for a second. If I press on the brake to try and come to a stop it will nearly kill the engine before I give up and shift it to neutral. This makes me think the torque converter is locking up and not letting go. I have a modified valve body and upgraded electronics in the trans. But other than that, itís stock.

Any ideas?


2005 QCSB, cold air intake, guages, a trans built by me and HPTuners tunes by me
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post #2 of 10 (permalink) Old 01-18-2020, 12:25 AM
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TQ converter is failing, sprag clutch is not releasing.

05 QC LWB 4x4 Auto 3.73 LSD, IssproEV2's, Performance 48RE Opie TransGo , Smarty Tuned BBI Injected
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post #3 of 10 (permalink) Old 01-18-2020, 02:08 AM Thread Starter
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F$&@, truck just started showing signs of needing injectors too. This is starting to get expensive.

2005 QCSB, cold air intake, guages, a trans built by me and HPTuners tunes by me
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post #4 of 10 (permalink) Old 01-18-2020, 05:27 AM
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Luck of the draw buying a used truck.
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post #5 of 10 (permalink) Old 01-18-2020, 12:53 PM
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How many miles and what signs are you seeing on your injectors?
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post #6 of 10 (permalink) Old 01-18-2020, 10:50 PM Thread Starter
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125k miles and slightly harder start in the mornings with a little bit of white hazing.

2005 QCSB, cold air intake, guages, a trans built by me and HPTuners tunes by me
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post #7 of 10 (permalink) Old 01-19-2020, 12:21 AM
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I feel your pain. I bought mine used. Injectors went to shyte the first month. Trans the next month. Replaced all sensors and cpu chasing other issues a couple months later. Power steering pump and hose shortly after on a long trip. Head gasket about 8 months later. Transfer case input shaft went to hell about a couple months after that.



All said and done, at least i have done the work myself and know what's been done. I can fix most thing roadside if needed now. It is now the most reliable vehicle in the barn and everything else we have is significantly newer.

These truck can be really good if you throw decent parts at them and do the work correctly.
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post #8 of 10 (permalink) Old 01-19-2020, 10:27 AM Thread Starter
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Iím a heavy diesel mechanic and do all of my own work myself. I bought this truck a little over a year ago and have put just over 20k miles on it. I havenít had to do anything to the truck up until this point. Itís just a bummer that these expensive parts had to go at the same time and of course, right after Christmas. At least tax time is here. Guess I know what Iím buying with my tax return.

Anyone have recommendations for triple disc converters?

2005 QCSB, cold air intake, guages, a trans built by me and HPTuners tunes by me
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post #9 of 10 (permalink) Old 01-19-2020, 11:18 AM
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You'll need to determine if it's the converter clutch that's failing, or if it's being commanded on; ie. valve body issue or electrical problem. A 48RE valve body is capable of locking the converter in any forward gear, including first.

DPC for a good triple disc converter, that is if you've got the valve body to support it on a stock shaft. Otherwise, I'd highly recommend a billet input shaft if going to a triple.
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post #10 of 10 (permalink) Old 01-19-2020, 05:26 PM Thread Starter
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I plan to do a billet input and flex plate

2005 QCSB, cold air intake, guages, a trans built by me and HPTuners tunes by me
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