# Transit Auto K8N-100398 Rear Brake Drum for 1985-1991 GMC Jimmy

### Performance Overview

Transit Auto offers the most comprehensive and highest-quality replacement kits on the market. Thanks to our cutting-edge AI, in-house product team, and proprietary fitment data, we are able to build and deliver the most accurate kits on the market. All our kits include the highest-quality parts on the market, sourced directly by Transit and its sub-brands. Backed by over 50 years of experience and with in-house quality assurance, every customer Transit Auto K8N-100398 is a vehicle-specific brake drum designed for compatible applications for 1985-1991 GMC Jimmy.

### Key Features

-   Engineered with Heat-Flowed cast iron to give our wheel cylinders the ideal balance between tensile strength and hardness
-   TQ OE-matched material gives our spring kit the ideal balance between tensile and hardness and provide consistent wear, long life, and quiet operation
-   Exclusive MetalliX™ Low Resin Semi-Metallic compound provides unmatched braking performance (abrasive friction, high temperature tolerance, quicker compound
-   Engineered with carbon-enhanced XCast™ (G3000) iron castings to achieve an optimal wear resistance, tensile strength and steel hardness providing unmatched
-   Anodized coating provides complete 360º protection against rust, moisture and oxidation

### Vehicle Fitment

**Fitment Position:** Rear

**Fitment Summary:** 1985-1991 GMC Jimmy

**Position:** Rear

-   1985-1991 GMC Jimmy — Position: Rear

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is K8N-100398.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   Brake Drum for Jimmy
-   Brake Drum for GMC Jimmy
-   K8N-100398 fitment
-   Transit Auto Brake Drum
-   Rear Brake Drum
-   1985 GMC Jimmy Brake Drum

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

1985

GMC

Jimmy

Rear

1986

GMC

Jimmy

Rear

1987

GMC

Jimmy

Rear

1988

GMC

Jimmy

Rear

1989

GMC

Jimmy

Rear

1990

GMC

Jimmy

Rear

1991

GMC

Jimmy

Rear

## Details

- **Price:** 215.0 CAD
- **Vendor:** Transit Auto
- **Type:** Brake Drum
- **Tags:** 1985 GMC Jimmy, 1985-1991-gmc-jimmy-brake-drum-rear-esi8568991, 1986 GMC Jimmy, 1987 GMC Jimmy, 1988 GMC Jimmy, 1989 GMC Jimmy, 1990 GMC Jimmy, 1991 GMC Jimmy, Automotive Parts, Brake Drum, Brake Drum Kit, Daily Driver, Direct Replacement, K8N-100398, Rear, Transit Auto, Transit Auto K8N-100398, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 215.00 CAD | In stock |

## Images

- Transit Auto K8N-100398 Brake Drum for 1985-1991 GMC Jimmy - Rear product image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/transit-auto-k8n-100398-brake-drum-for-1985-1991-gmc-jimmy-rear-k8n-100398)
> Updated: 2026-07-15