Timken Pinion Bearing Alloy Steel Roller

Description

Product Overview

Timken’s HM88649 pinion bearing is a precision‑engineered component built from premium alloy steel, delivering exceptional strength and wear resistance. This roller bearing features a machined exterior for optimal fit within automatic transaxle assemblies, measuring 3.4 x 3.4 x 1.3 inches and weighing 11 ounces. Its design reduces power consumption and friction, contributing to improved fuel economy while maintaining consistent performance over the bearing’s service life. The bearing is compatible with standard grease lubricants and meets rigorous automotive standards, ensuring reliability in both OEM and aftermarket applications.

Usage

The HM88649 is intended for use in automatic transaxle systems where the pinion gear requires smooth, low‑friction rotation. It is ideal for professional repair shops, fleet maintenance facilities, and knowledgeable DIY mechanics restoring or upgrading vehicle drivetrains. Install the bearing in environments where temperature stability and proper lubrication are maintained, typically within the vehicle’s transmission housing.

Why Choose Us

Choosing Timken means selecting a brand with over a century of bearing expertise and a reputation for durability. Each HM88649 bearing undergoes strict quality control, including dimensional verification and material testing, to guarantee a perfect fit and long service life. Timken provides comprehensive technical support and documentation, ensuring that installers have the information needed for correct mounting and maintenance. Our bearings are backed by a reliable warranty, reflecting confidence in their performance and longevity.

Key Features

• Alloy steel construction for high strength and wear resistance
• Roller design reduces friction and improves fuel efficiency
• Machined exterior ensures precise fit in automatic transaxles
• Compatible with standard grease lubricants for easy maintenance
• Proven durability with a 4.5‑star rating from 86 verified customers

FAQ

What vehicles are compatible with the HM88649 bearing?

The HM88649 is designed for a range of automatic transaxle applications, commonly found in many passenger cars and light trucks. Consult the vehicle’s service manual or contact Timken support with your VIN to confirm compatibility.

Can I use synthetic oil instead of grease?

Timken recommends grease for optimal lubrication of this roller bearing. Synthetic oil may not provide the same film thickness and could lead to premature wear.

How do I verify the bearing is installed correctly?

After installation, check for smooth rotation without binding, ensure proper axial clearance, and confirm that the bearing housing is clean and free of debris. A torque wrench should be used to secure mounting bolts to the manufacturer’s specifications.

What is the warranty coverage for this bearing?

Timken offers a limited warranty covering defects in material and workmanship for a period of one year from the date of purchase, provided the bearing is installed according to the recommended procedures.

Is this bearing suitable for high‑performance applications?

Yes, the alloy steel construction and roller design make the HM88649 suitable for both standard and high‑performance transaxle environments, provided that proper lubrication and installation guidelines are followed.