Home GM TH400 Heavy Duty Racing Transmission Billet Aluminum Direct Drum

GM TH400 Heavy Duty Racing Transmission Billet Aluminum Direct Drum

NOW $2,257.20
Or 4 interest-free payments of $564.30
In stock at 1 of our locations
🚛 Free NZ shipping
🔒 12 month warranty on all parts
NZ WOF compliant
🔧 Fitting available NZ wide

Features:
- Precision-engineered for GM TH400 compatibility
- Enhanced strength for high-torque applications
- Improves shifting performance and reliability
- Lightweight design for better efficiency

Heavy Duty Racing Transmission Billet Aluminum Direct Drum for GM TH400

Includes: 1 x Billet Aluminum Direct Drum

Fits Models: GM TH400

Model Years: 1965 - Present

Submodels: Various GM models with TH400 transmission

Engine Options: Compatible with multiple engine configurations

Description: Upgrade your GM TH400 transmission with this heavy-duty billet aluminum direct drum. Designed for enhanced durability and performance, it provides superior strength for high-performance racing applications. This direct drum ensures smooth shifting and improved reliability, making it ideal for both street and track use.

Elevate your racing experience with this essential component, ensuring your vehicle performs at its best.

Shipping Information

Most orders land in 5–12 business days. We'll keep you updated at every step of the journey.


The Kren Bits journey:

  • Order received — Day 0
  • With fulfilment — Day 1–2
  • Heading to courier — Day 2–4
  • Shipped — Day 3–7
  • Almost there — Day 5–10
  • Delivered — Day 5–14

Where your part ships from:

Your order ships from the closest warehouse with available stock across our six-warehouse network — NZ, AU, TH, UK, US, and CN.


We email you at every real milestone — order received, with fulfilment, heading to courier, shipped, almost there, delivered. No chasing, no vague waits.


For more details, visit our Track Your Order page.

Product Enquiry

Got a question about this product? Need to check fitment for your vehicle? Fill in the form below and we'll get back to you within 24 hours.


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