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The front pump is the oil pump of an automatic transmission. It bolts to the front of the case, behind the bell housing, and the torque converter drives it. Every bit of line pressure your transmission makes starts here. When it fails, you get a whine that rises with engine RPM, low or erratic line pressure, delayed engagement, and eventually no drive at all.
Here is the part that catches people off guard: the front pump is the very first thing bolted into the case and the very last thing you can reach. To replace it, the transmission comes out of the vehicle and the front half of the unit comes apart. There is no "quick pump swap." That single fact is why quotes range from $900 to well over $3,000.
Total Cost Range — 2026
| Approach | Parts | Labor | Total Installed |
|---|---|---|---|
| Pump reseal only (bushing + seals) | $40–$120 | 6–9 hrs | $900–$1,600 |
| Replace pump assembly | $180–$650 | 7–10 hrs | $1,400–$2,600 |
| Pump failure that fed debris everywhere | full rebuild kit | 12–18 hrs | $2,400–$4,000+ |
The wide spread is real. If a shop pulls the pan, sees clean fluid, and the whine is clearly a pump bushing or gears, they can reseal or swap the pump and button it back up. But if the pump gears were self-destructing, they sent aluminum through the whole valve body and clutch packs, and now you are into a rebuild whether you wanted one or not.
Why Labor Is the Whole Cost
Book time to remove and reinstall a transmission runs 5 to 8 hours on most rear-wheel-drive vehicles and can hit 9 to 12 on tightly-packed transverse front-wheel-drive layouts. On top of that, splitting the front of the case to access the pump, inspecting the gears and stator, and reassembling with the correct endplay adds a few more. At a $130–$180/hr independent shop labor rate, you are looking at $1,000–$2,200 in labor before a single part goes in.
This is why an honest shop will often push you toward a reman or full rebuild once the trans is already out. The transmission is out, it is on the bench, the case is open. Doing the pump and walking away leaves worn clutches and a tired valve body inside the same unit that will be back in six months.
Part Cost by Common Transmission
The pump itself varies wildly. A rebuildable pump body plus a seal-and-bushing kit is cheap. A new or remanufactured complete pump assembly, or a billet upgraded pump for a performance build, is where the money is.
| Transmission | Reseal Kit (bushing + seals) | Complete Pump Assembly |
|---|---|---|
| GM 4L60E / 4L65E | $25–$70 | $150–$400 |
| GM 4L80E | $30–$80 | $200–$500 |
| GM 6L80 / 6L90 | $40–$110 | $300–$650 |
| Ford 4R70W / 4R75W | $30–$90 | $180–$450 |
| Dodge 68RFE | $45–$120 | $350–$700 |
These are DIY and shop-direct part numbers. Dealer counter pricing on a factory pump assembly is typically 40–90% higher for the identical casting.
Signs It's the Pump and Not Something Cheaper
Do not let anyone sell you a pump job on a hunch. A worn pump has a distinct signature. Rule out the cheap stuff first.
- Whine that tracks engine RPM, not road speed. Rev in park or neutral and the whine climbs with the tach. Pump. If the noise only shows up while moving, look at bearings and the tailshaft instead.
- Low line pressure at a gauge. A $40 pressure gauge on the test port tells you in five minutes whether pressure is in spec. Low across all ranges points at the pump or its bushing.
- Delayed engagement that worsens when hot. A worn pump bushing lets the stator support bleed pressure, and it gets worse as fluid thins. Classic pump wear pattern.
- Aluminum glitter in the pan. Drop the pan. Fine aluminum in the fluid or on the magnet means pump gears or the stator are grinding. That changes the whole conversation, because that debris is now everywhere.
A slipping condition with no whine and normal pressure is almost never the pump. That is clutches or a valve body, and swapping a pump will not fix it.
Pump Bushings, Seals & Rebuild Kits — Ship Same-Day
If the trans is coming out, do it once. Our companion shop gearboxinsider.com stocks pump bushings, front seals, complete pump assemblies, and full rebuild kits for the common GM, Ford, and Dodge units. Same-day ship before 2pm Eastern, free shipping on every order.
Shop Gearbox Insider →Reseal vs Replace vs Rebuild — How to Decide
Reseal makes sense when the whine is a bushing, line pressure is only slightly soft, and the pan is clean. Cheapest path, but you are gambling the pump gears are still good.
Replace the pump assembly when the gears show wear, the stator bushing is scored, or the vehicle is otherwise low miles and you want the noise gone for good.
Full rebuild is the honest answer any time there is debris in the pan or the vehicle is over 120,000 miles. The trans is out and open; the marginal cost of new frictions, steels, and a valve body kit is a fraction of the labor you have already paid for. Walking away with just a pump on a high-mileage unit is how people pay for the trans to come out twice.
FAQ
Can I replace a transmission front pump without pulling the trans?
No. The pump is the frontmost component in the case, sealed behind the torque converter. The transmission must come out of the vehicle and the front of the case must be opened. Anyone telling you otherwise is talking about a different part.
Is a whining transmission always the front pump?
No. A whine that rises with engine RPM in park points at the pump. A whine tied to road speed is more likely a bearing or tailshaft. A pressure gauge on the test port settles it fast.
Should I just get a reman transmission instead?
Often yes, especially on a high-mileage vehicle. Once you add up pump parts plus 8 to 12 hours of labor, a remanufactured unit with a warranty can cost only a little more and resets the whole transmission, not just the pump.