Transmission & Auxiliary Pan Heaters
Also called: transmission pan heater, hydraulic reservoir heater, diff cover heater
The same silicone-pad technology as oil pan heaters, applied to transmissions, hydraulics, and differentials — for machines that have to do work the moment they start.
Price
$40–$120 CAD
Wattage
100–500 W
Install
DIY-easy
Best for
See verdict
Why heat a transmission?
Automatic transmission fluid thickens in deep cold just like engine oil. A -35°C transmission shifts harshly, holds gears, and takes real damage if worked hard immediately. Plow operators, delivery fleets, and farm equipment can't idle for 20 minutes waiting for driveline temps — pad heaters on the transmission pan and hydraulic reservoir mean the machine is ready when the engine is.
Install is identical to an oil pan pad: clean, degrease, bond, cure, plug in alongside the block heater on a splitter cord.
Pros
- Protects drivelines that work immediately after start
- Cheap and DIY-friendly
- Stackable with other heaters
Cons
- Niche need for commuter cars
- Adds to total plug-in wattage
Installation
Adhesive pad on a clean transmission pan, hydraulic tank, or differential cover.
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Canadian Polar Pad CP512 oil pan heater, 250 W
3.5×5.125 in pad sized for full-size truck and diesel pans — also rated for transmissions, generators, and hydraulic reservoirs.
Match the surface material, size and manufacturer limits. This is not vehicle-specific fitment.
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Part reference
Universal silicone pan heater pad, 150 W (4×5 in)
Self-adhesive silicone pad with a thermostat — bonds permanently to a clean steel or aluminum pan and warms the oil itself. The budget route to easier -30 starts.
Match the surface material, size and manufacturer limits. This is not vehicle-specific fitment.
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Zerostart 3400017 magnetic heater, 200 W
A magnetic surface heater from Zerostart. Grips any flat steel surface — oil pan, transmission pan, small-engine sump. CSA certified.
Match the surface material, size and manufacturer limits. This is not vehicle-specific fitment.
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Check the fitment for your own vehicle
Most passenger vehicles take a frost-plug element rather than this style. The fitment pages say which one your engine actually accepts.
Should you plug in tonight?
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