This Ram 3500 Chewed Through A Rebuilt Transmission In 3,000 Miles

A Transmission Should Last Longer Than This

Sure, no automatic transmission is immortal. Hauling heavy loads, skipping maintenance, and racking up the miles will eventually wear down even the toughest gearboxes. But what absolutely shouldn't happen is a transmission waving the white flag after just 3,000 miles.

That's exactly what happened in a recent video from Dave's Auto Center. The star of the show? A 2013 Ram 3500 Cummins with about 78,000 miles under its belt. According to the owner, this truck has chewed through more transmissions than most people have oil changes, with the latest one barely making it 3,000 miles before the same old problems popped up.

Digging Into the Real Cause

Before the teardown, the techs noticed a torque converter shudder during a quick test drive, plus the transmission just wouldn't let go when it was time to park. Things got a lot uglier after removing the transmission pan. The fluid still looked red enough, but it reeked of burnt toast and was swimming with metallic shrapnel.

A trip to a transmission specialist for a full teardown turned up another nasty surprise. Several valve body bolts were barely hanging on, which meant that hydraulic pressure was leaking. This resulted in slipping and burnt clutch packs. Even though the transmission had some upgraded guts, the techs agreed that sloppy assembly was probably what doomed it.

What Owners Can Learn

While this case is a bit of an outlier, there are some takeaways for owners (and service shops) who are on the verge of a major transmission repair. Swapping just the transmission and ignoring contaminated coolers or other parts is a recipe for a repeat disaster. And even tiny assembly slip-ups, like loose bolts, can turn into a wallet-draining nightmare once you're back on the road.

The techs also stress the importance of following the break-in routine after a rebuilt transmission goes in. That means no drag racing or hauling the heaviest trailer you can find for the first few hundred miles – give the transmission control module a chance to relearn its shift patterns.

If you own a heavy-duty truck, especially one that spends its life towing, make sure to ask exactly what's getting replaced during a transmission job. Paying a bit more for a thorough repair now could save you from reliving this nightmare a few thousand miles down the road.

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