Allison 1000 Stage 1 Performance Transmission (2017+)
No, I will ship my core first
$4,350.00 USD
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Allison 1000 Stage 1 Performance Transmission (2017+)
2017+ GM Duramax L5P 6.6L • 500hp • Allison 1000 6-speed automatic
Built for 2017 and newer GM Duramax trucks running stock setups or tunes up to 500hp. Updated to accommodate the revised solenoid and clutch pack configuration on the L5P platform, this unit addresses the most common Allison failure points.
Truck VIN Number
Required for transmission builds. We use your VIN to program the correct valve body and verify fitment for your specific truck.
$4,350.00 USD
Shipping calculated at checkout.
Built to order. Typical lead time 2 weeks. Ships nationwide.
What's Inside the Build
- Remanufactured OEM style converter
- Alto C1 16-friction stackup
- GPZ C2 7-friction stackup
- GPZ C3 6-friction stackup with machined pressure plate
- GPZ C4 6-friction stackup
- BorgWarner C5 stackup
- C3 ring gear spacer
- Custom valve body and pump modifications
- Custom case modifications
- Full gasket and seal kit with LML pistons
- LML style return springs
- Allison Torrington bearings and bushings
- OEM filters and pan
Transmission Fitment
Year & Engine: 2017+ GM Duramax L5P 6.6L
Transmission: Allison 1000 6-speed automatic
Horsepower Rating: 500hp
Best For: Stock setups or tunes up to 500hp
Build & Shipping Lead Time
Every Elite Motorsports transmission is built to order in our New Hampshire shop. Typical build time is 2 weeks from order date to ship date. Once your unit ships, it travels nationwide via Unishippers freight — fully insured and tracked door-to-door. If you need an exact in-hand date for a planned install window, call or text us at (603) 716-3804 before you order and we'll lock in your build slot.
2-Year Unlimited Mileage Warranty
Every Elite Motorsports shipped transmission is backed by our 2-year unlimited mileage warranty. No fine-print mileage caps. No surprise gotchas. If something internal fails inside the warranty period, we make it right — same shop that built your unit, same guys who answer the phone. Warranty is non-transferable and covers internal components on units installed by a qualified technician.
What's not covered: The warranty does not cover broken shafts, damage from racing or competition use beyond the rated stage of the unit, failures resulting from pure abuse or improper installation, or any damage caused by tuning beyond the recommended HP range of the build.
Additional Info
Core Exchange Options
You have two options at checkout:
- Send your core ahead of time — No core charge applies.
- Receive your unit first — A refundable core charge of $1,500 is applied at checkout and fully refunded once your core is returned within 30 days of delivery in rebuildable condition.
Questions About Fitment?
Call or text us directly at (603) 716-3804 or email sales@elitemotorsportsnh.com. We pick up.