Best Timken Automatic Transmission Seals in 2026

Daisy
Last Updated: Jul 19, 2026

At a Glance: Our Top Picks for Timken Automatic Transmission Seals

National 4370N Trans Case Output Shaft Seal
#TOP1
National 4370N Trans Case Output Shaft Seal
8.1
PM SCORE
National 3543 Oil Seal
#TOP2
National 3543 Oil Seal
6.4
PM SCORE
National 710112 Oil Seal
#TOP3
National 710112 Oil Seal
5.4
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 Timken Automatic Transmission Seals of 2026

Market Overview
Timken Automatic Transmission Seals Reviewed
  • Reviews Analyzed: 198 Items
  • PM Avg. Rating: 5.3 / 10
10 Products Evaluated
  • Highest Price: $16.53
  • Lowest Price: $6.16
  • Avg. Price: $9.86

National 4370N Trans Case Output Shaft Seal

NATIONAL
4370N
3.20 X 0.90 X 3.20 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
PartsHawk 9.43

Features

Design type: spring loaded; multi-lip

Temperature range: -20°F to 300°F / -29°C to 49°C

Resistance to EP lubricants

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

National 3543 Oil Seal

NATIONAL
3543
3.25 X 0.88 X 0.10 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -80°F to 350°F / -62°C to 176°C

Good dry heat resistance

Excellent low temperature capability

Delivers quality and reliable performance for every type of repair

Material: Silicone

Design type: Spring loaded; multi-lip

Temperature range: Minus 80 degree Fahrenheit to 350 degree Fahrenheit

Good dry heat resistance

Excellent low temperature capability

National 710112 Oil Seal

NATIONAL
710112
3.25 X 1.13 X 3.25 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -20°F to 300°F / -29°C to 49°C

Resistance to EP lubricants

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

Material: Polyacrylate

Design type: Spring loaded; multi-lip

Temperature range: Minus 20 degree Fahrenheit to 300 degree Fahrenheit

Compatible with most oils and EP lubricants at higher operating temperatures

High resistance to oxidation and ozone, and has low swell in hydrocarbon fluids

National 710808 Man Trans Output Shaft Seal

NATIONAL
710808
2.75 X 0.69 X 0.10 Inches
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -20°F to 300°F / -29°C to 49°C

Resistance to EP lubricants

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

National 710917 Trans Case Output Shaft Seal

NATIONAL
710917
3.25 X 0.88 X 0.10 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -20°F to 300°F / -29°C to 49°C

Resistance to EP lubricants

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

National 710119 Manual Transmission Input Shaft Seal

NATIONAL
710119
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

National 710119 Manual Transmission Input Shaft Seal

National 320603 Man Trans Input Shaft Seal

NATIONAL
320603
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; multi-lip

Temperature range: -40°F to 225°F / -40°C to 107°C

Good low temperature capability

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

National Oil Seals 710314 Auto Trans Output Shaft Seal

NATIONAL
710314
2.75 X 0.69 X 2.75 Inches
0.04 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -20°F to 300°F / -29°C to 49°C

Resistance to EP lubricants

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

Material: Polyacrylate

Design type: Spring loaded; multi-lip

Temperature range: Minus 20 degree Fahrenheit to 300 degree Fahrenheit

Compatible with most oils and EP lubricants at higher operating temperatures

High resistance to oxidation and ozone, and has low swell in hydrocarbon fluids

National 710714 Man Trans Shift Shaft Seal

NATIONAL
710714
2.00 X 0.63 X 0.10 Inches
0.02 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Design type: spring loaded; multi-lip

Temperature range: -40°F to 225°F / -40°C to 107°C

Good low temperature capability

Low swell in hydrocarbon fluids

Delivers quality and reliable performance for every type of repair

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

Top 10 automatic transmission seals Brands on Amazon

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

Brand Count
National 10

Top 10 automatic transmission seals Brands Pie Chart


We've carried out a comprehensive analysis of 198 reviews on automatic transmission seals, using our selection criteria to identify the best options in the automotive replacement parts. Our findings reveal that most customers typically select automatic transmission seals priced around $9.86, with top brands including gm, atp automotive, acdelco and atp and wolfsburg tuning

Our team of expert editors reviewed these high-quality items and handpicked the top 10 automatic transmission seals for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the automotive replacement parts category. These include amazon.com, remco transmission parts and finditparts inc. and wolfsburg tuning .

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