# 23370817 Reversing Gear Kit | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta HS68IV-A Complete Vertical-Offset Reverse Gear - 1.56:1 - Part Number: 23370817

  

A genuine Volvo Penta complete HS68IV-A marine reverse gear with a 1.56:1 reduction. The IV version uses the vertically offset output arrangement required by selected D3, D4 and D6 inboard installations.

  

Kit Contents:

  

• 1 x complete assembled HS68IV-A reverse gear - Volvo Penta 23370817

• Hydraulic forward and reverse clutch assemblies - integral to the complete transmission

• Ratio-specific input shaft, countershaft, output shaft, gears, bearings and seals - integral to complete assembly 23370817

• Internal components are supplied as part of the complete transmission and are not separately itemised under this kit

  

⚙️ Key Features

  

• HS68IV-A vertical-offset architecture

• Factory 1.56:1 reduction

• Complete hydraulically shifted transmission

• Used with D3-H and D4 / D6 G-generation inboard engines

• Serial-specific flywheel-housing and coupling connection

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 23370817 current HS68IV-A 1.56:1 reverse-gear reference

  

OEM / Related Numbers:

  

• 23370817

• HS68IV-A adapter, flexible-coupling and oil-line parts selected by serial number

  

Aftermarket / Verified Equivalents:

  

• No direct aftermarket complete transmission equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• HS68IV-A replacement

• Vertical-offset inboard repower

• Replacement following major clutch or gear failure

  

Typically suits:

  

• Engine models / drive models:

• D3-150I-H

• D3-170I-H

• D3-200I-H

• D3-220I-H

• D4-145I-G

• D4-175I-G

• D4-230I-G

• D4-270I-G

• D4-300I-G

• D4-320I-G

• D6-300I-G

• D6-340I-G

• D6-380I-G

• HS68IV-A

  

• HP Range: Approximately 150HP - 380HP in the commonly listed engine packages

• Engine Type: Volvo Penta HS68IV-A hydraulically shifted vertical-offset reverse gear

• Year Range: D3-H and D4 / D6 G-generation production

• Serial Range: HS68IV-A nameplate, 1.56:1 ratio, output geometry and engine / gearbox serial numbers controlled

  

🔌 Function

  

The transmission hydraulically selects ahead or astern and routes torque through a vertically offset 1.56:1 gear train to suit the vessel shaft-line installation.

  

Common signs replacement, service or overhaul is required:

  

• Forward or reverse will not engage correctly

• Gearbox slips under load

• Oil contains metal or clutch debris

• Vertical-offset shaft or gear train is damaged

• Complete unit replacement is required

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 12670.9 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 12670.90 AUD | In stock |

## Images

- 23370817 Reversing Gear Kit | Genuine Volvo Penta Part

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/23370817-reversing-gear-kit-genuine-volvo-penta)
> Updated: 2026-07-30