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48RE Transmission Problems


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Having what I believe to be Transmission problems. I have a 2005 QC with 48RE Transmission. No major mods just ...



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Old 08-30-2017, 01:43 PM
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48RE Transmission Problems

Having what I believe to be Transmission problems. I have a 2005 QC with 48RE Transmission. No major mods just a CAI and Borla Catback. Noticed an issue driving it a day after washing it. Not sure if washing it has anything to do with the cause just thought I would mention it. I did use a pressure washer to spray off the hood scoop screen. I was driving it and the transmission would randomly down shift and shift back. Got it home, didn't think anything of it then went on vacation. Came back drove it again and with light throttle application it would down shift seek the next gear and not shift out of gear until I let off the gas. I had to baby it all the way home. Under 2500 RPMs. I did a little research and think I might have it narrowed down to the transmission pressure governor and pressure sensor transducer. I did a little research and it seems that this is a common problem. There's even a TSB for the 48RE to replace the transmission pressure governor. I plan on replacing those parts but I figured I'd throw a line out and see what comes back before I spend money.


Last edited by CantEven; 08-30-2017 at 01:58 PM.
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Old 08-30-2017, 02:44 PM
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Governor sensor.
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Old 08-30-2017, 04:18 PM
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Pressure governor always goes out on the 48-46re's !
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Old 08-30-2017, 04:22 PM
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Could that be an issue with mine under wot won't shift into 4th until i let off will hit rev limiter at 120mph
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Old 08-30-2017, 07:29 PM
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Yes sir, or usually on every gear, when you mash the pedal it will bounce off the rev limiter till you let off , than it will allow it to shift
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Old 08-30-2017, 09:08 PM
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Replace all sensors in valve body and our upgraded GM Solenoid conversion
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Old 08-30-2017, 09:38 PM
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Could that also be the issue with mine? A couple months ago I was stuck behind a semi going about 55 mph. When I went to pass I put the pedal down hard, maybe to the floor, and instead of accelerating the truck fell flat on its face. It's hard to describe but I imagine the truck tried to go down to 2nd from fourth, missed (or something) and the rpms bounced off the redline until I let up off the gas. Only after that did it grab a gear and I could accelerate. By that time a car was in the distance so I decided to fall back behind the semi. What was spent fixing the engine knock was supposed to go into this issue.
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Old 08-31-2017, 12:10 AM
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I don't know if you guys know Martin Saine (MSAINE.com)out of California, but he builds our trans for the 5.9s, look him up ! Best guy for the 46 & 48re's hands down, he can probably even sell you a built valve body
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Old 08-31-2017, 10:13 AM
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Just purchased the Dodge 48RE Upgrade Governor Pressure Solenoid Kit and
DODGE 48RE PRESSURE SENSOR TRANSDUCER from JTS Venom. Going to install the weekend it comes in. Keeping my fingers crossed that it solves the issue.
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Old 08-31-2017, 03:45 PM
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Good luck man. Hope it fixes the problem
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