Dodge Ram Transmission Problems (2003-2025)

What’s Wrong With My Ram’s Transmission? A Guide to Common Problems

Dodge Ram trucks are renowned for their power and capability, but for many owners, that reputation is tarnished by transmission-related issues. Complaints range from a sudden, harsh “bump” when coasting to a stop , to a persistent shudder during acceleration, or a frustrating delay when shifting into gear. These symptoms are often the first sign of a potentially serious and expensive problem.

However, “Dodge Ram transmission problems” is not a single, universal issue. The specific failures are highly dependent on the truck’s generation, model, and engine. A 2016 Ram 1500 with a Hemi engine has fundamentally different transmission issues than a 2018 Ram 3500 with a Cummins diesel.

This guide serves as a diagnostic funnel. It will help identify the likely transmission in a specific truck, detail the most urgent safety recalls, and then explore the specific technical failures, symptoms, and repair costs associated with each major transmission model.

Quick Diagnostic Symptoms Table

For a preliminary diagnosis, the following table matches common symptoms to their most likely underlying causes and affected models.

URGENT: NHTSA Investigates 1.2M Rams for Rollaway Risk (July 2025)

The most critical and time-sensitive issue affecting Ram owners is a major federal safety investigation. In July 2025, the National Highway Traffic Safety Administration (NHTSA) opened an investigation into nearly 1.2 million Ram pickup trucks for a potential rollaway risk.

• Models Affected: 2013-2018 Ram 1500, 2500, 3500, and 4500/5500 Chassis Cabs.
• The Problem: The investigation centers on the failure of the Brake Transmission Shift Interlock (BTSI). This is the safety mechanism that should prevent the column shifter from being moved out of the “Park” position unless the ignition is on and the brake pedal is depressed.
• The Symptom: A failure in the BTSI can allow the shifter to be moved out of “Park” inadvertently, even without the key in the ignition or the brake applied. This creates a significant risk of the vehicle rolling away unexpectedly.

This investigation is particularly alarming because it is reviewing the effectiveness of remedies from two previous, related recalls: 17V-821 (2017) and 18V-100 (2018).¹¹ NHTSA has received 14 owner complaints and, more critically, six reports of injuries that occurred after the original recall fix was performed.

This suggests the original remedy, which involved installing a bracket and replacing an attached solenoid, may be insufficient to permanently solve the problem. Owners of 2013-2018 models are strongly urged to check their Vehicle Identification Number (VIN) for updates on the official(https://www.nhtsa.gov/recalls).

Identify Your Transmission: A Guide by Ram Model, Year, and Engine

To diagnose a transmission problem, one must first identify the specific transmission in the truck. Ram has used dozens of different transmissions , but the unit can almost always be identified by the truck’s model year, engine, and in the case of heavy-duty models, its torque output.

The following table synthesizes data from multiple sources to help identify the most common automatic transmissions used in 3rd, 4th, and 5th Generation Ram trucks.

Ram Transmission Identification Table (Gen 3-5)

This data reveals a clear narrative. The 68RFE has been a source of failure for owners of 6.7L Cummins trucks since 2007.5. The fact that Ram is finally replacing this long-running 6-speed automatic in 2025 with a heavy-duty 8-speed from ZF—the same manufacturer that builds the successful 1500 transmission—is a strong indication of the 68RFE’s persistent, long-term failures when paired with the high-torque Cummins engine.

Ram 1500 8-Speed Problems (8HP70, 845RE, 850RE): Shudders and Software

The German-designed ZF 8-speed automatic transmission used in the Ram 1500 (and its Chrysler-built variants, the 845RE and 850RE) is a world-class gearbox. It is used by numerous luxury and performance brands, including BMW, Audi, and Rolls-Royce, and is generally considered highly reliable.

However, “reliable” does not mean flawless. Ram 1500 owners report a distinct set of problems, which can be broadly divided into two categories: software glitches that require an update, and mechanical hardware flaws that require a rebuild.

The Software Fix: TSBs for Harsh Shifting (“2-1 Bump”)

The single most common complaint for the 8-speed transmission is a “rough or harsh shifting during coastdown to a stop,” often described as a “2-1 bump”. This symptom feels like the truck is being lightly rear-ended as it comes to a stop.

In many cases, this is not a mechanical failure but a software calibration issue within the Transmission Control Module (TCM). Ram has issued multiple Technical Service Bulletins (TSBs) to address this:

• TSB 21-010-20: This bulletin, which supersedes a 2016 TSB, specifically addresses the “2-1 bump” in 2016 Ram 1500s equipped with the 3.0L diesel, 3.6L V6, and 5.7L V8 engines. The fix is not a new part, but simply reprogramming (or “flashing”) the TCM with updated software.
• TSB 21-015-25: This TSB for brand new 2025 Ram 1500s (with the 8HP75 transmission) shows the problem persists. It addresses a “bump or jerk felt during Engine Start/Stop (ESS) operation” and other “transmission shifting concerns”. The cause is listed as “TCM software,” and the fix is again, a reprogram.

Before authorizing any expensive mechanical repairs for harsh shifting, Ram 1500 owners should first request that a dealership check for and apply any available TCM software updates.

The Hardware Failures: Internal Component Flaws

When software is not the culprit, the 8-speed transmission has two well-documented mechanical weak points. These failures typically present as grinding noises, delayed gear engagement, or slipping in specific gears.

1. Failure Point 1: The A-Clutch Pressure PlateThe “A” clutch is used for slow takeoffs and 7th and 8th gears. Its backing plate is a thin, stamped-steel component. Under high line pressure, this “flimsy” plate can flex, which compromises the clutch’s load capacity. This flaw can cause “shaky or slow takeoffs” or “7th and 8th gear flutters.” Over time, this repeated stress can cause the plate to crack or break entirely.
2. Failure Point 2: The E-Clutch Hub SplineThis is considered the most popular failure point in the ZF 8-speed. The “E” clutch (used for gears 2, 3, 4, 6, and 8) is located far from the transmission’s pump and is susceptible to “oil deprivation”. The hub that its clutches spline onto is also described as “flimsy.” The splines on this hub can wear down and eventually strip out completely. When this happens, the hub spins freely and can no longer engage the ring gear, resulting in grinding noises and a total loss of power in those gears.

Both of these hardware failures point to a common theme: cost-saving measures on small, internal “flimsy” components, which create a specific, repeatable mechanical failure point under the stress of a heavy truck.

Ram 2500/3500 68RFE Problems: The “Cummins Transmission Curse”

For owners of 2007.5 to 2024 Ram 2500 and 3500 trucks with the 6.7L Cummins engine, the 68RFE 6-speed automatic transmission is a notorious source of failure. The core problem is that the transmission is widely considered to be under-built for the massive torque output of the Cummins diesel engine.

This weakness is dramatically exposed when the truck is tuned for more power or used for heavy towing, which often leads to premature failure, slipping, and overheating.

Common symptoms of a failing 68RFE include:

• Gear Slipping and Shuddering: This can feel like a hesitation or “flare” of the engine RPMs between shifts, especially into 4th or 5th gear. A low-speed shudder or vibration is a classic sign that the torque converter is failing and breaking down.
• Harsh or Delayed Shifts: Sudden “bangs” or hard jolts during shifting are not normal. They are often a sign of premature wear in the valve body, which is struggling to regulate fluid pressure.
• Overheating: This is a leading cause of 68RFE failure. Towing heavy loads generates immense heat, which breaks down the transmission fluid. Once the fluid degrades, it loses its lubricating properties, and the internal clutch packs begin to slip and “burn up,” leading to a cascading failure.

The immense torque from the 6.7L engine is often more than the stock 68RFE can handle, a common issue for those pushing their.

Technical Failure Deep Dive: What Breaks in the 68RFE

The 68RFE’s failures are not subtle; they are catastrophic mechanical breakdowns of core components.

1. The Torque Converter: This is a primary weak point. The stock converter cannot effectively handle the Cummins’ torque, leading to shudder, vibration, and the creation of excessive heat that contaminates the fluid and destroys the transmission.
2. The Valve Body: The 68RFE valve body is plagued with design and quality-control issues.
   • Accumulator Backing Plate: This plate holds pistons that absorb shock during shifts. It is infamously made of an “incredibly weak and soft metal” that a “child could bend by hand”. Under normal operation—and especially with the increased line pressure from a performance tune—this plate flexes and “blows off,” causing a massive fluid leak and immediate shift failures.
   • Solenoid Switch Valve (SSV): This valve is known for wearing out the bore it sits in, causing fluid to “crossleak”. This starves the overdrive clutches of pressure and commonly triggers a P0871 (Overdrive Pressure Switch Rationality) fault code.
3. Weak Clutch Packs: The stock clutch packs, particularly in the overdrive circuit, are known for having an insufficient clutch capacity. They degrade, slip, and burn out, especially under towing conditions.

Legacy Issues: 3rd Gen (2003-2007) 48RE Transmission Problems

Owners of the highly popular 3rd Generation Ram (2003-2007) with the 5.9L Cummins engine face a different set of issues with their 4-speed 48RE transmission. The 48RE, which replaced the 47RE in 2003, is a hydraulically controlled transmission with electronic controls for the governor and overdrive.

Its problems are more “traditional” automatic transmission failures, almost all of which are accelerated by heat.

• Overheating: This is the number one enemy of the 48RE. Towing, especially without an adequate auxiliary cooler, generates temperatures that destroy the fluid and internal seals.
• Busted Bands and Clutches: These are wear items. The overdrive brake clutch pack is a common failure point that is known to burn out.
• Shifting Slippage: As with any transmission, this is often a sign of low or burnt-out fluid, but can also point to worn-out clutches or bands that are no longer holding.
• Valve Body Woes: The 48RE’s valve body can become clogged with debris from a failing torque converter or clutches, leading to rough, erratic shifting or a failure to engage gears.

Cost to Fix: Ram Transmission Repair, Rebuild vs. Replacement

When a Ram transmission fails, the repair costs are substantial. A complete transmission replacement can average between $5,787 and $6,297, with labor costs alone often exceeding $1,000.

However, for 68RFE owners, the choice of repair is critical.

The 68RFE “Rebuild Trap”

A 68RFE owner faces a critical decision that can lead to a costly trap. A local shop may offer a “basic rebuild” for $4,500 to $6,500, or an “OEM replacement” transmission may be sourced for $6,000 to $8,500.

These options seem cheaper, but they are often a financial trap. A “rebuild” or “OEM replacement” typically uses the exact same stock-level parts that failed in the first place. Given that the root cause of 68RFE failure is that the OEM components are not strong enough for the Cummins engine, these “fixes” are temporary. They are destined to fail again, especially if the truck is used for towing or has a performance tune.

The only durable, long-term solution for a failed 68RFE is a “Built” Performance Transmission. While the upfront cost is higher—typically starting around $6,600 and climbing to $13,000 or more—this is the only option that solves the root problem. A “built” unit includes essential upgrades like a billet torque converter, a re-engineered valve body with a rigid accumulator plate, and upgraded clutch packs that can handle the Cummins’ torque.

2025 Cost Comparison: 68RFE Rebuild vs. Replacement vs. Built

Other Repair Costs

• Solenoid Pack Replacement: For some electronic shifting issues, a solenoid pack is the fix. The part alone can range from $115 to over $477, depending on the model.
• 48RE Rebuild Kits: For 3rd Gen owners who prefer a DIY approach, master rebuild kits for the 48RE vary widely in price and capability, from a basic kit at $595 to a high-performance “Stage 2” kit rated for 650 HP at $4,100.

How to Prevent Transmission Failure: A Maintenance Guide

For Ram owners whose transmissions are still healthy, preventative maintenance is the key to avoiding failure.

1. Prioritize Transmission Fluid: Fluid is the lifeblood of the transmission.
   • Use the Right Fluid: Only use the OEM-approved ATF+4 fluid for Chrysler-built transmissions (like the 48RE and 68RFE). Using the wrong fluid can cause shift problems.
   • Change it Regularly: The standard interval is every 30,000-50,000 miles.
   • Change it Sooner for Towing: If the truck is used for heavy towing or hauling, that interval should be shortened to every 20,000-30,000 miles.
2. Keep it Cool: Heat is the number one killer of automatic transmissions.
   • The single best investment for any Ram truck that tows is an aftermarket heavy-duty transmission cooler.
   • Ensure the engine’s cooling system (radiator, fans, coolant) is in perfect condition, as it works in tandem with the transmission cooler.
3. Stay Updated: Regularly ask a dealership to check for TCM and ECU software updates. As seen with the 8-speed TSBs, a simple software flash can fix significant drivability issues.
4. Drive Smart: Gentle driving habits reduce the wear and tear on clutches and bands. Avoid aggressive acceleration, especially when the transmission is cold.

Proper maintenance is critical for the 6.7L engine. Following a strict service schedule is key, as detailed in our.

Frequently Asked Questions (FAQs)

What are the first signs of a Ram transmission failing?

The earliest signs are often subtle. They include a new whining or buzzing noise 41, a slight hesitation or “slip” when the transmission shifts gears, or a shudder/vibration felt at low speeds. A burning smell is a serious sign that the transmission fluid is overheating.

What years did Dodge Ram have the worst transmission problems?

While this is debatable, two eras are particularly notorious. The 3rd Generation (2003-2007) trucks with the 5.9L Cummins are known for 48RE failures due to heat and high torque. More recently, the 4th and 5th Generation (2007.5-2024) 6.7L Cummins trucks are infamous for 68RFE failures, as the transmission is widely considered under-built for the engine’s power.

How much does it cost to replace a 68RFE transmission?

An OEM-style replacement typically costs $6,000 to $8,500. However, this unit has the same flaws as the original. A “built” performance transmission, which permanently fixes the 68RFE’s weak points, is the recommended long-term solution and costs between $6,600 and $13,000+.

Is the 8-speed ZF transmission in the Ram 1500 reliable?

Yes, the ZF 8-speed is generally considered very reliable.21 Most common complaints, like the “2-1 bump,” are software-related and can be fixed with a dealer TCM flash. It does have known (but less common) mechanical weak points, such as the A-clutch pressure plate and E-clutch hub splines.

Can a transmission tune fix my 68RFE problems?

No. A performance tune will make the problem worse and accelerate the failure. The 68RFE’s mechanical parts, like the accumulator backing plate, are already too weak for stock power. The increased line pressure and torque from a tune will cause them to fail much faster.

Conclusion: Your Path Forward

Transmission problems in Ram trucks are a well-documented and frustrating reality, but they are not a single, unsolvable issue. The path to a solution depends entirely on the specific truck and transmission.

• For 2013-2018 owners (all models): The first priority is safety. An owner should immediately check their VIN on the NHTSA website to monitor the rollaway investigation and any new recalls.
• For Ram 1500 (8-Speed) owners: If the issue is harsh shifting, the problem may be as simple as a TCM software update.¹ This should be the first diagnostic step before authorizing expensive mechanical work.
• For Ram 2500/3500 (68RFE) owners: The failure is almost certainly mechanical and stems from under-built components. An owner should be wary of the “rebuild trap” and avoid paying thousands for a stock-level repair that is likely to fail again. The only permanent solution is a “built” transmission with upgraded components.