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Allison Transmission Parts, Fluids and Supplies for Duramax Trucks

MadJack Diesel is your one-stop discount house for Allison transmission parts. We believe maintaining your Allison transmission should be easy and affordable, which is why we offer quality products at a discount. MadJack Diesel offers Allison transmission filters for Duramax trucks, Allison transmission fluid for GMC and Chevy Duramax, Allison performance kits and converters, Allison transmission pans, and more. We pride ourselves on our product quality, and we promise that the products you buy from us are Allison-branded products or of the same superior quality to OEM Allison parts.

In addition to our products, at MadJack Diesel we also pride ourselves on superior customer service. If you have a question about any of our products, please do not hesitate to give us a call. We’re not strangers to spending time on the phone talking to customers, explaining, and giving advice; it’s just how we do business. Another thing you can be sure of is fast delivery. We ship all of our in-stock items the same day if ordered before 3 p.m. We’re confident you’ll find what you need for your Allison transmission at MadJack Diesel Performance.