Shop All Transmission Parts →
The RE5R05A is Nissan's rear-wheel-drive five-speed automatic, built by Jatco under the code JR507E. It lives behind the VQ and VK engines in the Nissan Titan, Armada, Frontier, Xterra, Pathfinder, and 350Z, and in the Infiniti G35, FX35, FX45, M35, and QX56. It is a stout unit that will take a lot of abuse — but it has a short list of well-known failure points, and one of them, the radiator cooler failure, can destroy an otherwise healthy transmission in a single road trip.
Two things kill RE5R05A units: heat and coolant. The heat comes from towing and off-road low-speed work with no auxiliary cooler. The coolant comes from the factory transmission cooler that lives inside the radiator end tank. When that internal cooler fails, engine coolant and ATF mix. If you own one of these trucks, understanding that single failure mode is worth more than anything else on this page.
Symptoms & What Causes Them
Harsh or banging 1-2 shift
A hard slam on the first-to-second upshift is the most common RE5R05A driveability complaint. It usually starts in the valve body: worn bores and a sticking pressure-control circuit let the shift land hard. Fresh fluid and a valve body repair or replacement fix most of these before they escalate. Left alone, the hammering wears the clutches.
Slipping, flaring, or delayed engagement
Engine revs climb without matching acceleration, or the truck hesitates before it grabs a gear. That is clutch slip from worn frictions, low line pressure, or a failing solenoid in the valve body. Ratio and solenoid codes in the P0730-P0760 and P0745 family point at the hydraulics and clutches.
Overheating under tow load
These transmissions run hot when worked. Tow near the truck's rating up a grade in summer with only the factory in-radiator cooler and the fluid temperature climbs fast. Overheated ATF oxidizes, loses its friction properties, and takes the clutches and converter with it. An auxiliary cooler is close to mandatory on any RE5R05A that tows or wheels.
Pink, milky fluid — the "strawberry milkshake"
This is the one that ends transmissions. The factory ATF cooler is built into the radiator's end tank. When the barrier inside it cracks, engine coolant pushes into the transmission and ATF pushes into the cooling system. The result is a pink, milky, contaminated fluid that shop guys call a strawberry milkshake. Coolant destroys the friction material and glue in the clutch packs. Once the fluid looks like this, a flush alone will not save it — the transmission needs to come apart, and the radiator or its cooler has to be replaced or bypassed at the same time or it will contaminate the rebuild too.
What It Costs to Fix
Costs on the RE5R05A split sharply depending on whether coolant got into it. A valve body or solenoid repair is moderate. A coolant-contaminated unit is a full rebuild plus cooling-system work. Ranges below are typical U.S. independent-shop pricing, parts and labor.
| Repair | What It Addresses | Typical Cost (Parts + Labor) |
|---|---|---|
| Fluid & filter service (Matic-S / Matic-J) | Harsh shifts, maintenance | $180 - $350 |
| Solenoid / valve body repair | Harsh 1-2, flared shifts, codes | $600 - $1,400 |
| Auxiliary transmission cooler install | Towing overheat prevention | $200 - $500 |
| Torque converter | Lockup shudder, converter wear | $800 - $1,500 |
| Full rebuild (parts + labor) | Slipping, burnt clutches | $2,400 - $4,200 |
| Rebuild + radiator/cooler (coolant contamination) | "Strawberry milkshake" failure | $3,200 - $5,500 |
If your fluid is pink and milky, do not let anyone talk you into just flushing it and driving away. Coolant has already attacked the clutch glue. The correct fix is a teardown plus replacing or bypassing the radiator cooler so you do not re-contaminate the fresh build.
Fluid Spec & Service Intervals
The RE5R05A calls for Nissan Matic-S in later applications; earlier trucks and some models specify Matic-J, and Matic-S is the current supersession that covers the range. Use genuine Nissan fluid or a name-brand ATF that explicitly states Matic-S / Matic-J compatibility. This is not a place for generic multi-vehicle fluid — the wrong friction modifier shows up as harsh shifts and shudder.
Nissan's severe-service schedule calls for a fluid change, and on a towing or off-road truck you want it more often than the normal-duty interval — every 30,000 miles is reasonable for a worked truck, 60,000 for a gentle daily driver. Every service is also your chance to inspect the fluid for the first hint of pink or milkiness, which is your early warning that the radiator cooler is starting to fail before it takes the whole transmission out.
What Goes Wrong — The Short List
- Radiator ATF cooler cross-contamination. The number-one killer. The internal cooler cracks, coolant and ATF mix into a pink milkshake, and the clutch material disintegrates. Replace or bypass the cooler with any rebuild.
- Valve body wear and sticking. Causes the harsh 1-2 shift and flared shifts. Repairable or replaceable without a full teardown if caught early.
- Solenoid failure. Sets pressure and ratio codes, causes slipping and hard shifts. Lives in the valve body.
- Overheating from towing without a cooler. Cooked fluid takes out clutches and the converter. Add an auxiliary cooler.
- Torque converter clutch wear. Lockup shudder and contamination on high-mileage or overheated units.
Parts You'll Likely Need
Whether you are doing a valve body repair, adding a cooler, or building the unit, these are the parts that come up on the RE5R05A.
- Valve body & solenoids (RE5R05A) →
- Master rebuild / clutch kit →
- Nissan Matic-S / Matic-J ATF →
- Auxiliary transmission cooler →
Need RE5R05A Parts? Ships Same-Day
Whether it's a valve body, a solenoid, or a full rebuild after coolant contamination, our companion shop gearboxinsider.com stocks the valve bodies, solenoids, rebuild kits, and seals for the RE5R05A / JR507E. Same-day ship before 2pm Eastern.
Shop Gearbox Insider →FAQ
My transmission fluid looks pink and milky — what happened?
Engine coolant has gotten into the transmission through the factory ATF cooler inside the radiator. It is called a strawberry milkshake, and it is serious: coolant destroys the friction material in the clutch packs. A flush will not save it. The unit needs to come apart and the radiator or its cooler must be replaced or bypassed so it does not re-contaminate the rebuild.
Do I really need an auxiliary cooler on my Titan or Armada?
If you tow or wheel it, yes. The RE5R05A runs hot under load, and overheated fluid is behind a large share of the rebuilds we see on these trucks. An auxiliary cooler is cheap insurance against a several-thousand-dollar failure.
Why does my truck slam into second gear?
A harsh 1-2 shift on the RE5R05A usually starts in the valve body — worn bores and a sticking pressure circuit. Caught early with a fluid service and a valve body repair, it is a moderate fix. Ignored, the hard shifts wear the clutches and push you toward a rebuild.