Best Automatic Extension Housing Seals in 2026

Daisy
Last Updated: Feb 11, 2026

At a Glance: Our Top Picks for Automatic Extension Housing Seals

Mazda M507-17-335A Manual Trans Extension Housing Seal
#TOP1
Mazda M507-17-335A Manual Trans Extension Housing Seal
7.0
PM SCORE
GM Genuine Parts 15665311 Automatic Transmission Case Rear Extension with Seal
#TOP2
Gm Genuine Parts 15665311 Automatic Transmission Case Rear
6.6
PM SCORE
Crown Housing Extension
#TOP3
Crown Housing Extension
6.2
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 Automatic Extension Housing Seals of 2026

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

Gm Genuine Parts 15665311 Automatic Transmission Case Rear Extension With Seal

GM
15665311
8.50 X 8.30 X 6.70 Inches
1.85 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Product Type :Auto Part

Package Dimensions :7.75" L X5.25" W X5.25" H

Country Of Origin :United States

Package Weight :1.85Lbs

#TOP3

Crown Housing Extension

CROWN AUTO
83503156
5.00 X 4.50 X 4.50 Inches
1.40 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Make: Jeep

: 12 Month

High quality construction.

Color: Unpainted

Construction: Aluminum

Acdelco Gm Original Equipment 24249876 Automatic Transmission Case Rear Extension With Seal

ACDELCO
24249876
16.60 X 8.30 X 8.30 Inches
3.87 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 with GM Original Equipment specification for fit, form, and function

Country of Origin : Canada

Mopar 4412522Ac Automatic Transmission Extension Housing Seal

MOPAR
4412522AC
0.10 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
GM FORD CHRYSLER JEEP DODGE RAM OEM PARTS 8.63

Features

Atp Automotive Atp Lo-42 Automatic Transmission Extension Housing Seal

ATP AUTOMOTIVE
LO-42
42.00 X 42.00 X 12.00 Inches
0.12 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Product Type :Auto Part

Package Dimensions :9.144 Cm L X8.89 Cm W X2.794 Cm H

Country Of Origin :China

Package Weight :0.12Lbs

Atp Jo-57 Automatic Transmission Extension Housing Seal

ATP
JO-57
4.13 X 4.13 X 1.66 Inches
0.12 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

package dimensions :8.89 cm L x 9.144 cm W x 2.794 cm H

Product type :AUTO PART

country of origin :China

package weight :0.12lbs

Atp Fo-213 Automatic Transmission Extension Housing Seal

ATP
FO213
3.33 X 3.33 X 1.12 Inches
0.15 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

package weight :0.1lbs

Product type :AUTO_PART

Country of Origin : China

Package Dimensions: 2.5 L x 16.4 H x 10.4 W (cm)

Atp Fo-199 Automatic Transmission Extension Housing Seal

ATP
FO-199
3.33 X 3.33 X 1.12 Inches
0.20 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

package dimensions :8.382 cm L x 15.748 cm W x 7.874 cm H

Product type :AUTO PART

country of origin :China

package weight :0.2lbs

Atp Automotive To-24 Automatic Transmission Extension Housing Seal

ATP AUTOMOTIVE
TO-24
42.00 X 42.00 X 12.00 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

Part number: TO-24

Package Weight: 0.100 pounds

Country of origin : China

#TOP11

Gm Genuine Parts 8651419 Automatic Transmission Case Extension Seal

GM
8651419
6.00 X 6.00 X 0.30 Inches
0.01 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Country of Origin : United States

The Package Height of the Product is 0.3 inches

The Package Length of the Product is 3.5 inches

The Package Width of the Product is 3.5 inches

Timken 710142 Automatic Transmission Extension Housing Seal

TIMKEN
710142
3.70 X 3.70 X 0.80 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Product Type: Auto Part

Model Number: 710142

Item Package Dimension: 4.29" L x 3.9" W x 1.24" H

Item Package Weight: 0.56 lb

#TOP13

Mopar 6814 2480Aa, Auto Trans Extension Housing Seal

MOPAR
68142480AA
6.00 X 6.00 X 3.00 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
World Parts Direct 9.73

Features

Genuine Mopar OEM product

Acdelco Gm Original Equipment 24286193 Automatic Transmission Extension Housing Seal

ACDELCO
24286193
5.80 X 5.80 X 0.40 Inches
0.02 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

Top 10 automatic extension housing seals Brands on Amazon

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

Brand Count
Atp 3
Acdelco 2
Atp Automotive 2
Gm 2
Mopar 2
Crown Auto 1
Mazda 1
Timken 1

Top 10 automatic extension housing seals Brands Pie Chart


We've carried out a comprehensive analysis of 181 reviews on automatic extension housing seals, using our selection criteria to identify the best options in the automotive replacement parts. Our findings reveal that most customers typically select automatic extension housing seals priced around $27.37, with top brands including gm, acdelco, toyota, atp, timken, atp automotive, mopar, dyson and graco and mcculloch

Our team of expert editors reviewed these high-quality items and handpicked the top 14 automatic extension housing 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, original auto parts xpress, fred haas toyota world parts, gm ford chrysler jeep dodge ram oem parts, world parts direct, americamart, jbtools, huayangtd and ahjhs and shift rite transmissions .

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 extension housing seals to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.