Diff Spreader

ARBs Air Locker(TM) Differential Spreader is a professional automotive tool that no differential installer should be without. Most common Salisbury style axle assemblies (e.g., Dana Spicer model 44) require the use of a differential spreader in order to achieve the required carrier bearing pre-load during set-up. Stretching the housing casting (or pumpkin) open by sufficient enough force as to allow extra shim to be added to create the pre-load is the method that the OEM manufactures endorse, and most manufacture's have included special spreader sockets in the housing for exactly this purpose. Insufficient pre-load can result in bearing failure, or ring and pinion failure on any differential, and possible oil/air leakage issues in an Air Locker(TM) Differential. As a part of ARBs Air Locker(TM) Tools range of differential service/installation equipment, this specialty tool offers an easy, quick and highly effective way of pre-loading these axles.

Additional Information

ARB Air Locker(TM) Differential Case Spreader;

Part Type

Differential Conversion Spacer

• Air Locker Differential Case Spreader Tool
• Allows the housing to be stretched in a safe and controllable way which reduces the risk of causing permanent damage to the housing
• Comes in a durable carry case with a dedicated powder coated parts tray for easy storage and transport
• Pre-drilled with a hole pattern that suits most of the commonly available axle types
• Suited to pre-loading shim adjusted Banjo style axle assemblies

Note for Australian and European Markets

All ARB products are genuine and supported directly by StreetFX with in-house warranty in line with Australian Consumer Law (ACL). StreetFX is not affiliated with ARB Corporation. Front bars, and some accessories, may have slight regional differences between domestic and imported vehicles. Variations can occur due to compliance, factory LHD or RHD configurations, and may have different regional fitment standards. We recommend confirming details with a StreetFX representative if you are unsure whether your item may be affected by these differences.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information