My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

ATP SO21 Automatic Transmission Oil Pump O-Ring Seal

(GMC G2500 1979-95, Yukon 1992-97, Sonoma 1991-97, K1500 1979-86, 1988-97, C1500 1979-86, 1988-97, K2500 1979-86, 1988-97, Jimmy 1970-97 + 254 more models)

Part of: ATP Automatic Transmission Oil Pump O-Ring Seal

Other options in this family: ATP TO7

Manufacturer

Picture for manufacturer ATP

Part Number

SO21
11 reviews
Sale Price

$6.23

1 left at this price

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ATP SO-21 is a precision-engineered automatic transmission oil pump o-ring designed to provide a reliable seal for transmission oil pump assemblies. This critical sealing component prevents transmission fluid leaks and maintains proper hydraulic pressure within the transmission system.

Key Features:

  • Exact-fit replacement o-ring for automatic transmission oil pumps
  • Manufactured to OE specifications for proper fit and function
  • High-quality elastomer construction resists transmission fluid and heat
  • Prevents fluid leaks and maintains hydraulic system integrity
  • Direct replacement for worn or damaged original seals

ATP Transmission Seals and Gaskets are engineered as no-compromise replacement parts, ensuring reliable performance and proper sealing in automatic transmission applications. This o-ring is essential for transmission oil pump rebuilds and repairs.

Products specifications

Fits

GMC G2500 1979-95, Yukon 1992-97, Sonoma 1991-97, K1500 1979-86, 1988-97, C1500 1979-86, 1988-97, K2500 1979-86, 1988-97, Jimmy 1970-97, Savana 2500 1996-97, Savana 3500 1996-97, Savana 1500 1996-97, C3500 1979-86, 1988-97 + 250 more models

Outside Diameter

8.5

LineCode

ATP

great price ...fast shipping thanks

Easy to navigate,

great and esay experience

Easy easy! Thanks!

Great

seemed a bit hard to find products, but the prices were great and delivery prompt

It would not give me the option to use pay pal

Excellent

I bought a bicycle rack. It seemed like the product was delivered before I had even known it was shipped. Great price!

Good price, easy to use.

Great experience

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy