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Automann · Electrical & Lighting
178.391211R.
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This is a heavy-duty 39MT-type starter motor used on diesel truck engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 22 applications
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All confirmed applications for this part number.
Peterbilt
Other applications
Peterbilt
Other applications
Applications sourced from aftermarket retailer listing; year ranges not provided for Peterbilt models. Verify against your engine and vehicle specifications.
Part data verified against 5 catalog sources
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It operates on 12 volts, has an 11-tooth drive gear that rotates clockwise, and features a rotatable mounting flange for flexible installation. The 6/8 pinion pitch and 82 solenoid position ensure proper gear engagement and reliable cranking. It is typically replaced when the original starter fails, becomes sluggish, or no longer engages the engine flywheel correctly.
Part Number: 178.391211R.
STARTER (39MT,12V,11 TOOTH,CLOCKWISE ROTATION,ROTATABLE FLANGE,PINION PITCH 6/8,82 SOLENOID POSITION) 8200308
Unit: ea
Vendor: Automann
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
