Transaxle – General Information, Codes, and Gear Ratios

Overview

The transaxle is a critical component of the Porsche 944 2.5L NA (1982–1989), combining the transmission and differential into a single unit located at the rear of the vehicle. Understanding your transaxle’s specifications, including its code and gear ratios, is essential for maintenance, repairs, or upgrades. This guide provides detailed information on identifying and understanding the transaxle codes specific to the 2.5L NA models, which were equipped with either steel control arms (pre-1985.5) or alloy control arms (1985.5–1989), affecting suspension and transaxle interactions. This information ensures proper compatibility when replacing parts or troubleshooting issues.

Identifying Your Transaxle

To determine your transaxle type, check the option code sticker on your vehicle. If the sticker is missing or the transaxle has been replaced, you must locate the code stamped on the top flange near the front of the transaxle. This requires an inspection mirror, flashlight, and possibly a rag to clear debris. The transaxle code identifies the specific configuration, including gear ratios and whether a limited-slip differential (LSD) is present.

Transaxle Codes and Gear Ratios

The following table lists the transaxle codes and gear ratios for the Porsche 944 2.5L NA (1982–1989). These transaxles are specific to the 2.5L naturally aspirated engine, with variations for different markets and LSD options. Note that pre-1985.5 models use steel control arms, while 1985.5–1989 models use alloy control arms, which may influence transaxle mounting and alignment considerations.

Sources

• Clark’s Garage
• Pelican Parts
• Porsche 944 Workshop Manuals
• YouTube