Best Automotive Replacement Manual Main Shaft Extension Seals in 2026

Daisy
Last Updated: Jul 19, 2026

At a Glance: Our Top Picks for Automotive Replacement Manual Main Shaft Extension Seals

ATP HO-9 Automatic Transmission Extension Housing Seal
#TOP1
Atp Ho-9 Automatic Transmission Extension Housing Seal
9.5
PM SCORE
Timken 4333N Seal
#TOP2
Timken 4333N Seal
9.2
PM SCORE
GM Genuine Parts 8657163 Automatic Transmission Manual Shift Shaft Seal
#TOP3
Gm Genuine Parts 8657163 Automatic Transmission Manual Shift
8.4
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Automotive Replacement Manual Main Shaft Extension Seals of 2026

Atp Ho-9 Automatic Transmission Extension Housing Seal

ATP
HO-9
4.63 X 4.63 X 2.69 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Manufactured to meet or exceed original equipment specs

Package Dimensions: 2.794 H x 9.144 L x 9.144 W (centimetres)

Package Weight: 0.1 pounds

Country of Origin : China

Timken 4333N Seal

TIMKEN
4333N
3.46 X 3.46 X 1.08 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Prevents seal leakage

Excellent sealing ability

Resists abrasives, corrosive moisture and other harmful contaminants from entering the machines

Offers superior service life

World-class manufacturing standards

Gm Genuine Parts 8657163 Automatic Transmission Manual Shift Shaft Seal

GM
8657163
1.20 X 1.20 X 0.30 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Recommended Replacement Part For Your Gm Vehicle's Original Factory Component

Offering The Quality, Reliability, And Durability

Manufactured To Gm One Specification For Fit, Form, And Function

Country Of Origin : United States

Mazda M507-17-335A Manual Trans Extension Housing Seal

MAZDA
M507-17-335A
0.00 X 0.00 X 0.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Genuine Kia Parts 7.97

Features

genuine oem factory part

exact fit

durable

best in quality

this is not an aftermarket part

OEM

Fit Type: Vehicle Specific

Toyota Genuine Oil Seal For Automatic Transmission Extension Housing

TOYOTA
90311-40001
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Fred Haas Toyota World Parts 9.70

Features

1984-2008 4Runner, 1989-1992 Cressida, 2007-2008 FJ Cruiser, 1994-1997 Previa, 2001-2013 Sequoia, 1986-1998 Supra, 1993-1998 T100, 1995-2013 Tacoma, 1984-1995 Pickup Truck, 2000-2013 Tundra

Genuine Toyota Product

A high quality OEM replacement toyota

Oil Seal For Automatic Transmission Extension Housing

Backed by 1 year or 12k warranty which ever comes first

Atp Automotive So-22 Automatic Transmission Extension Housing Seal

ATP AUTOMOTIVE
SO-22
66.00 X 66.00 X 9.00 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AutoPlus Auto Parts 9.40

Features

Manufactured to meet or exceed original equipment specs

Package Dimensions: 2.54 H x 8.89 L x 8.89 W (centimetres)

Package Weight: 0.022 pounds

Country of Origin : China

Fit type: Vehicle Specific

Gm Genuine Parts 24232324 Automatic Transmission Case Extension Output Shaft Seal

GM
24232324
3.30 X 3.30 X 0.60 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability

Manufactured to GM OE specification for fit, form, and function

Made in United States

Acdelco Gold 4333N Crankshaft Front Oil Seal

ACDELCO
4333N
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Dependable replacement

Economically priced

Provides the performance you expect

Country of Origin : Taiwan

E-Cowlboy 3162992 Front Crankshaft Seal Removal & Installation Tool For Cummins Signature Isx Qsx Replace M20146 3162992

E-COWLBOY
3162992
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Bird's wings 9.88

Features

FITMENT -- Fits for Cummins Signature ISX QSX diesel truck engine, do not work on ISX12 or ISX15, for those you will need 4918991(not supplied).

FUNCTION -- This kit allows the seal to be properly positioned on the crank nose to the front cover

SUPERIOR MATERIAL -- Constructed from high standard heavy duty billet aluminum for strength, durability, and longevity; coated with silver oxide finish for resistance to rust and corrosion.

KIT CONTENT -- Direct replacement of the OEM cummins # 3162992. Includes 3162993, 3163056, 3033627, 3896790, and 3279794.

100% SATISFACTORY GUARANTEE -- We are responsible for our product and service. If you're not 100% satisfied with this item, simply return it for a full refund in 30 days. Premium Support & 12 Months’ Warranty.

Gm Genuine Parts 24256576 Automatic Transmission Manual Shift Shaft Seal

GM
24256576
2.10 X 2.10 X 0.50 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

GM-recommended replacement part for your GM vehicle’s original factory component

Offering the quality, reliability, and durability of GM OE

Manufactured to GM OE specification for fit, form, and function

Package Dimensions : 1.3 L x 1.3 W x 0.4 H inches

Fit type: Vehicle Specific

National 222742 Man Trans Input Shaft Seal

NATIONAL
222742
2.00 X 0.63 X 2.00 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; single-lip

Temperature range: -40°F to 400°F / -40°C to 204°C

Excellent high temperature capabilities

Compatible with wide range of fluids

Delivers quality and reliable performance for every type of repair

Material: Fluoroelastomer

Design type: Spring loaded; single-lip

Temperature range: Minus 40 degree Fahrenheit to 400 degree Fahrenheit

Excellent high temperature capabilities and compatible within a wide range of fluids

Provides long life while providing superior performance

Gm Genuine Parts 19206241 Manual Transmission Input Shaft Seal

GM
19206241
2.30 X 2.30 X 0.40 Inches
0.03 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Gm-Recommended Replacement Part For Your Gm Vehicle’S Original Factory Component.

Offering The Quality, Reliability, And Durability Of Gm Oe.

Manufactured To Gm Oe Specification For Fit, Form, And Function.

Country Of Origin: Indonesia

Acdelco Gm Original Equipment 361165 Manual Transmission Case Extension Output Shaft Seal

ACDELCO
361165
3.20 X 3.20 X 0.70 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Jolt Parts 7.27

Features

Gm-Recommended Replacement Part For Your Gm Vehicle’S Original Factory Component.

Offering The Quality, Reliability, And Durability Of Gm Oe.

Manufactured To Gm Oe Specification For Fit, Form, And Function.

Country Of Origin: United States

Replacement Manual Transmission Output Shaft Seal Fits 2003-2005 Bmw 325I

SAWYER AUTO
EB4-638462
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
WLSupply 9.74

Features

⚠️ Fitment Notes: ⚠️ Seal - Output Shaft (40 X 55 X 8 mm), Quantity needed per vehicle: 1, Not for cars with Sequential Manual Transmission (SMG).

✅ To Ensure That the Product Is Compatible with Your Vehicle, We Recommend Using the Fitment Search Tool Located at the Top of This Page

✅ Replacement Parts are Specifically Designed as an Upgrade from the Original Materials Provided by the OEM

✅ Our Direct Fit Replacement Product Installs Seamlessly, Just Like the Factory Unit

✅ Each Product Undergoes Rigorous Inspection to Ensure Utmost Reliability and Quality

Top 10 automotive replacement manual main shaft extension seals Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Gm 4
Acdelco 2
Atp 1
Atp Automotive 1
E-Cowlboy 1
Mazda 1
National 1
Sawyer Auto 1
Timken 1
Toyota 1

Top 10 automotive replacement manual main shaft extension seals Brands Pie Chart


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We are dedicated to assisting our users in finding the right seals Products based on their needs, saving them considerable time when choosing which automotive replacement manual main shaft extension seals to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.