# 21821906 Gear Set | Genuine Volvo Penta Part

## 🔧 Product Description

Matched DPH-C gear set for the upper-gear / clutch assembly. Gear geometry and ratio are drive-specific; bearings, shims and adjacent shaft hardware must be inspected and set to workshop specifications during installation.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta DPH-D1
-   Volvo Penta D6-330A-F
-   Volvo Penta D6-370A-F
-   Volvo Penta D4-260A-F
-   Volvo Penta D4-300A-F
-   Volvo Penta D6-300A-F
-   Volvo Penta D4-225A-F
-   Volvo Penta D6-300A-G
-   Volvo Penta D6-340A-G
-   Volvo Penta D6-380A-G
-   Volvo Penta DPH-E
-   Volvo Penta D6-400A-G
-   Volvo Penta D6-400A-F
-   Volvo Penta D4-150A-G
-   Volvo Penta D4-230A-G
-   Volvo Penta D4-270A-G
-   Volvo Penta D4-300A-G

-   **Engine Family:** DPH, D
-   **HP Range:** 150-400 HP

## ⚙️ Key Features

-   Factory-matched gear members
-   Drive-specific ratio and tooth geometry
-   Hardened marine gear surfaces
-   Requires controlled bearing setup
-   Drive serial and ratio must match

## 📋 Kit Contents

-   1 × matched DPH-C gear set - 21821906
-   Bearings, shims, spacer sleeves, sliding sleeve and shaft hardware shown in the drive diagram are serviced separately unless explicitly included in the sealed gear-set package

## 🔌 Function

Transmits engine torque through the DPH-C upper gear and clutch assembly at the specified ratio and direction.

## ⚠️ Common Signs of Failure

-   Gear whine, rumble or knocking
-   Pitted, chipped or spalled teeth
-   Excessive backlash or heat
-   Loss of reliable drive engagement

## 🛠️ 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

-   21821906 → Supersedes 21511554

### OEM / Related Numbers

-   21511554 earlier number superseded by this part
-   3852301 - retaining nut
-   889122 - spacer sleeve
-   22224949 - washer
-   22050739 - spacer tube
-   3849006 - sliding sleeve
-   3862368 - shaft

## 📦 Condition

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

## Details

- **Price:** 3552.03 AUD
- **Vendor:** Volvo Penta
- **Type:** Drives & Propulsion
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3552.03 AUD | In stock |

## Images

- 21821906 Gear Set | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21821906-gear-set-genuine-volvo-penta)
> Updated: 2026-09-19