Rear Main Seal Replacement: labor quote guide
Typical labor time (approximate)
About 4 to 10 hours. Roughly 4 to 10+ hours, because the transmission (and often the transfer case or subframe) has to come out; the seal itself is quick.
Approximate only: a rough general range, not labor-guide data. Times vary widely by vehicle and condition. Check a labor guide for the exact vehicle. How we estimate
The quote buttons open the labor-quote calculator prefilled; "Start an estimate" adds a labor line to the estimate & invoice generator. Add your own rate, parts and tax.
What's involved
- Confirm the leak source with UV dye and rule out the oil pan, filter housing and other leaks
- Remove the transmission and flywheel or flexplate
- Replace the seal (or seal housing) with the correct tool, avoiding crankshaft damage
- Reassemble and check for leaks
General outline only. Follow the service information for the specific vehicle.
What changes the time
- AWD and FWD transverse layouts
- Manual vs automatic
- Two-piece seals on older engines
- Seal housings with sealant cure times
Related parts & common add-ons
- Clutch (manual transmissions)
- Torque converter seal
- Oil pan gasket
- Flexplate inspection
Price parts with the parts markup calculator, and note findings on the inspection checklist.
FAQ
Is it worth it?
It depends on the leak's severity and the vehicle's value. Some customers choose to monitor a minor seep.
Do the clutch at the same time?
On manual transmissions, if the clutch has any wear, quoting it together saves the labor overlap.
Can a PCV problem cause it?
Yes. Excess crankcase pressure can push oil past seals. Check the PCV system.