Transmission Output Shaft Seal Buying Guide — Cheap OEM Replacement Parts for Sale | REVXSC
Looking for cheap transmission output shaft seals that won't fail in 6 months? Whether you're chasing transmission tail shaft seal leak, ford 4r70w output shaft seal replacement, how to replace transmission output seal, rear transmission seal cost, transfer case output shaft seal, this guide covers what to buy, what to skip, and how to make sure the part you order actually fits your truck or car. Every transmission output shaft seal sold at REVXSC ships with a verified year/make/model/engine fitment table — no guessing.
What transmission output shaft seals actually do
In one sentence: the lip seal at the rear of the transmission that keeps fluid inside while the driveshaft yoke spins through it. When they wear out, you'll typically feel it before you see it — your car starts telling you something is wrong, and ignoring it gets expensive.
Signs you need new transmission output shaft seals
- transmission fluid leak at the rear of the trans
- wet driveshaft yoke
- red fluid drips on the ground after parking
- low transmission fluid level
- rough shifts from low fluid
If you tick more than one box, replace before it leaves you on the side of the road. The repair gets a lot cheaper when you catch it early.
Also known as
Depending on the shop manual, region, or supplier you're reading, transmission output shaft seals are also called: tail shaft seal, rear transmission seal, transmission tail seal, extension housing seal, output seal, yoke seal. They all refer to the same component — when you're cross-referencing OEM and aftermarket part numbers, watch for these naming variations so you don't double-order the same item.
How much should you pay?
Online direct-ship from REVXSC undercuts dealer parts counters significantly. We carry quality replacement transmission output shaft seals from SKF, National, Timken, ATP, Pioneer, Mahle, Sealed Power, Dorman — every listing shows the price, the fitment chart, and real product photos. No mystery part numbers.
Featured transmission output shaft seals in stock right now
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OEM vs aftermarket: which to choose
For transmission output shaft seals, the brand actually matters. SKF and National supply major automakers as OEM suppliers — when you buy their boxed retail product, you're getting the same engineering and tolerances. Choose between standard nitrile rubber lip seals for OE replacement or fluoroelastomer (Viton) seals for severe duty and higher operating temperatures..
Install: DIY or shop?
Difficulty: intermediate. Bay time runs about 30–90 minutes with the right tools. Lifespan you should expect: 80,000-150,000 miles.
How REVXSC keeps prices low
Every listing includes a year/make/model/engine table.
ACDelco, Bosch, Dorman, Dayco, FEL-PRO and more.
Ships from US warehouses with real tracking.
No knockoff boxes, no rebranded junk.
Transmission Output Shaft Seal shipping to every US state
REVXSC ships transmission output shaft seals same-day from US fulfillment to every state. Whether you're chasing salt-corroded transmission output shaft seals in the Midwest, heat-fatigued parts in the Southwest, or just need a fast OEM-grade replacement, every order ships from the US with tracking. We deliver to:
Common questions Americans ask about transmission output shaft seals
How much does it cost to replace a transmission output shaft seal?
The seal itself costs $10 to $30 from SKF, National, or Timken. Shop labor runs $150 to $400 because the driveshaft must be removed and the seal driven out and replaced with a proper installation tool.
What causes an output shaft seal to leak?
Common causes include normal age and heat hardening, a grooved or pitted driveshaft yoke surface, excessive transmission tail shaft bushing wear, overfilled transmission, and a blocked transmission vent that pressurizes the case.
Can I drive with a leaking transmission output seal?
Short distances are safe if the fluid level stays above minimum. Heavy leaks that drop fluid below the pump pickup can starve the transmission and cause catastrophic damage. Check fluid level daily and top up until repaired.
How long does it take to replace an output shaft seal?
A DIY output seal job takes 1 to 2 hours including driveshaft removal, seal extraction, new seal installation, and reinstallation. A shop typically books 1 to 1.5 hours of labor.
Do I need to replace the tail housing bushing with the seal?
Inspect the bushing whenever you replace the seal. If the bushing shows wear, the driveshaft yoke wobbles and quickly destroys the new seal. Always replace the bushing if it's loose, scored, or out of spec.
Where is the transmission output shaft seal located?
The output shaft seal sits inside the rear of the transmission tail housing (or transfer case on 4WD vehicles) where the driveshaft yoke slips in. It's accessible from underneath after removing the driveshaft.
Can I replace the output shaft seal without removing the transmission?
Yes. The seal replaces with the transmission in the vehicle. Simply remove the driveshaft, pull the old seal with a seal puller or pick, install the new seal with a driver of the correct diameter, and reinstall the driveshaft.
How long do transmission output shaft seals last?
Quality seals last 80,000 to 150,000 miles. Towing heat, severe-duty cycling, and poor driveshaft yoke surface finish reduce life. Always inspect the yoke and replace any scored or worn parts when the seal goes in.
Will replacing the seal stop the leak permanently?
Yes, if the underlying cause is just an aged seal. If the yoke is grooved or the tail bushing is worn, the new seal will leak again within a few thousand miles. Always inspect and address root causes during the repair.
Top US searches for transmission output shaft seals
Most-searched phrases from American shoppers comparing transmission output shaft seals this year — all of these are served by what REVXSC stocks:
This guide is updated as our transmission output shaft seal inventory and fitment data change. Last reviewed 2026-06-28.