Autometer 2-5/8 Sport-Comp Tr

OVERVIEW

Monitoring your transmission temperature is an absolute necessity for anyone serious about the longevity and performance of their air-cooled Volkswagen or off-road machine. The AutoMeter 2-5/8 Sport-Comp Transmission Temperature Gauge (ATM3552) provides the critical data you need to prevent catastrophic failure caused by overheating fluid. In the world of high-performance VW builds, heat is the ultimate enemy. Whether you are crawling through soft sand in a heavy Manx-style buggy or pushing a fully loaded Type 2 Bus over a mountain pass, your transaxle fluid works overtime. This gauge features the iconic Sport-Comp styling, characterized by its signature black face, bold white numbering, and high-visibility orange pointer, ensuring that you can monitor your vitals with a quick glance without taking your eyes off the road or trail for too long.

The ATM3552 utilizes AutoMeter''s legendary air-core meter movement, providing the rugged durability and precision accuracy that professional racers have relied on for decades. Unlike mechanical gauges that require bulky capillary tubing, this short-sweep electric gauge is significantly easier to install in the tight confines of a Volkswagen cockpit. It comes complete with a high-quality 1/8-inch NPT temperature sender and additional 3/8-inch and 1/2-inch NPT adapters, making it versatile enough for a variety of custom cooling setups or aftermarket oil pans. By installing this gauge, you are not just adding a stylish accessory to your dashboard; you are investing in a sophisticated early-warning system that allows you to adjust your driving style or cooling capacity before expensive internal damage occurs to your gears, synchros, and bearings.

FITMENT

While this is a universal high-performance gauge, it is a favorite for the following Volkswagen and off-road applications:

• Volkswagen Type 1: Beetle, Bug, and Super Beetle (All Years).
• Volkswagen Type 2: Bus, Transporter, Kombi, and Westfalia (1950-1979).
• Volkswagen Type 3: Fastback, Squareback, and Notchback.
• Volkswagen Type 181: The Thing.
• Volkswagen Karmann Ghia: All Years.
• Custom Off-Road: Dune Buggies, Sand Rails, Baja Bugs, and Manx-style shells.
• Transmission Types: Suitable for both manual transaxles (monitoring gear oil temp) and automatic transmissions.

SPECS

• Product Model: AutoMeter Sport-Comp ATM3552.
• Gauge Diameter: 2-5/8 Inches (66.7mm).
• Gauge Type: Short Sweep Electric.
• Temperature Range: 100 to 250 Degrees Fahrenheit.
• Movement Type: Precision Air-Core.
• Face Color: Black with White Digits and Orange Pointer.
• Bezel: Low-profile Silver/Aluminum.
• Lighting: Perimeter Incandescent (Includes red and green bulb covers).
• Sender Included: 1/8-inch NPT Electrical Temperature Sender.
• Adapters Included: 3/8-inch NPT and 1/2-inch NPT brass fittings.
• Voltage: Compatible with 12-Volt electrical systems.

PRO TIPS

1. Optimize Your Sender Placement for Real-World Accuracy

For the most accurate reading of your transmission''s health, we recommend installing the temperature sender in the hottest part of the system. On many air-cooled VW transaxles, this is best achieved by using a weld-in bung (such as AutoMeter #2260) directly into the side of the oil pan or the lowest point of the transmission case where fluid collects. If you are running an external transmission cooler with a pump system, placing the sender in the "outbound" line leading to the cooler will give you the peak temperature reading, which is the most critical number for preventing fluid breakdown. Always ensure the sender tip is fully submerged in the fluid flow for a consistent and responsive reading on your gauge.

2. Ensure a Solid Ground for Electrical Precision

Electric gauges are highly sensitive to electrical resistance, and a poor ground is the most common cause of "jumpy" needles or inaccurate readings. Since the sender typically grounds through the body of the transmission, ensure that your transmission-to-chassis ground strap is clean and tight. If you are using Teflon tape on the sender threads to prevent leaks, be careful not to over-wrap it; the threads must make physical contact with the bung or adapter to complete the electrical circuit. If you suspect a grounding issue, you can use a dedicated grounding clamp on the sender body to ensure the signal remains pure and the gauge stays calibrated.

3. Protect Your Wiring in Harsh Environments

In a rear-engine Volkswagen, the wiring must travel from the dashboard all the way to the back of the vehicle, often passing through the central tunnel or along the chassis rails. To protect the signal wire for your ATM3552, always use high-quality split-loom tubing or heat-shrink shielding. Keep the gauge wiring away from high-voltage components like spark plug wires or the ignition coil to avoid electromagnetic interference (EMI), which can cause the needle to flutter. Using a grommet whenever the wire passes through a metal firewall is non-negotiable to prevent vibrations from chafing the wire and causing a short circuit that could blow a fuse or damage the gauge movement.