Drivetrain Differentials and Rear-End Components

Diamond Motorsports

Transmission Motor Mount

$270.00

SKU: DM3TMM

In Stock
In Stock
Ships by Aug 4
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Diamond Motorsports Transmission Motor Mount (DM3TMM) is engineered for the Mazdaspeed3 to significantly improve power transfer, reduce drivetrain slop, and minimize wheel hop, all while incorporating minimal Noise, Vibration, and Harshness (NVH). This mount features a unique design where the bushings are oriented correctly to support the motor and effectively absorb vibrations across the entire bushing. This precise orientation allows for the use of stiff bushings without causing excessive NVH, further enhanced by a transverse orientation of the bushing carrier that reduces stress on bushing flanges. Constructed for extreme durability, the DM3TMM boasts a full-length, Tig-welded steel build that is CAD-designed, FEA-analyzed, and has undergone rigorous street and track testing. The specifications include a machined aluminum bushing carrier available in anodized gold or black, and lower and top mount bases made from high-strength steel that are Tig-welded and powder-coated black. It utilizes OTS Energy poly bushings and comes with all necessary high-grade fasteners and nylon lock nuts.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDiamond Motorsports
Part NumberDM3TMM
CategoryChassis Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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