# 21255889 Gear Set | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine matched gear set used in Volvo Penta DPR-A and DPR-B sterndrives.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D6-370A-C
-   Volvo Penta D4-300A-C
-   Volvo Penta D4-300A-D
-   Volvo Penta D4-300A-E
-   Volvo Penta D6-370A-D
-   Volvo Penta D6-370A-E
-   Volvo Penta D6-400A-E
-   Volvo Penta DPR-A
-   Volvo Penta DPR-B

-   **Engine Family:** D, DPR
-   **HP Range:** 300-400 HP

## ⚙️ Key Features

-   Genuine Volvo Penta matched drive gears
-   DPR-A and DPR-B application
-   Precision-machined and matched tooth profiles
-   Designed for high-output marine propulsion
-   Requires correct shimming and bearing preload

## 🔌 Function

The gear set transfers torque through the sterndrive at the designed reduction ratio.

## ⚠️ Common Signs of Failure

-   Abnormal drive noise
-   Metallic debris in gear oil
-   Chipped or pitted teeth
-   Excessive gear backlash
-   Drive vibration
-   Loss of forward or reverse propulsion
-   Overheating caused by incorrect bearing preload

## 🛠️ Service Notes

-   Gear sets are supplied as a matched set and must be fitted complete — never run a new gear against a used mate, and keep the set together as it was delivered
-   Setting up requires the shimming, backlash and tooth contact pattern checks in the workshop manual for your engine and drive, together with the proper measuring and pressing tools; this is not a fit-and-hope job
-   Establish why the old set failed before assembly — debris, a collapsed bearing or oil starvation will destroy the new gears just as quickly
-   Renew the bearings, seals and locking hardware at the same time, and flush the housing thoroughly so no metal debris is left in it
-   Fill with the oil specified for your drive, then check the oil early in service for signs of abnormal bedding-in debris

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21255889 → Supersedes 3862374

### OEM / Related Numbers

-   3862374 earlier number superseded by this part

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 3545.06 AUD
- **Vendor:** Volvo Penta
- **Type:** Power Transmission
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3545.06 AUD | In stock |

## Images

- 21255889 Gear Set | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21255889-gear-set-genuine-volvo-penta)
> Updated: 2026-10-09