Allison 1000 Transmission Stage 4 900+ HP Max
$20,745.30
Zip and humm are available over the phone: (07) 5619 7869
- We confirm fitment to your exact vehicle before we build
- Freight quoted to your postcode (heavy-freight items)
- Talk to a builder about spec, lead time & tuning
Request a Build Quote & Fitment Check
You’re requesting a build quote for: Allison 1000 Transmission Stage 4 900+ HP Max
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Available to order
Fast AU-Wide Shipping
Special order – no change-of-mind returns
12 month warranty
Will it fit your vehicle?
This part is listed to suit:
- MakeChev / GMC
Fitment listings are a guide. Not sure? Send us your rego or VIN and we’ll check before you order.
Description
The Allison 1000 Transmission Stage 4 900+ HP Max is supplied by Randy’s Transmissions (USA) and imported to order through Willys Workshop.
A complete built transmission. Builds are made to order: contact us to confirm your vehicle, power level, torque converter and options before you order.
Not sure it is the right part for your vehicle and transmission? Contact our team and we will check fitment before you order. Fitting available at Willys Workshop.
Imported to Order: Through Our Workshop
- Brought in from our supplier and received at our Sunshine Coast workshop first.
- From there we can build, tune or fit it for you, or ship it on to you or your mechanic.
- Freight: estimate at checkout, or a quote. Checkout shows the estimated freight for your postcode. Pay it now and we confirm the final cost before dispatch (it may differ), or request a freight quote at checkout. Any workshop work is quoted on enquiry.
- Typical lead time is confirmed at the time of order.
Freight questions or a build quote: call (07) 5619 7869 or email sales@willysworkshop.com.au.
Additional information
| Weight | 165 kg |
|---|---|
| Dimensions | 75 × 60 × 55 cm |
| Make | Chev / GMC |
Warranty: Willys Workshop and Randy's Transmissions
Sold and warranted by Willys Workshop. Parts carry our 12-month warranty against defects, from the date of purchase or installation (whichever is later), subject to any manufacturer terms and fair wear and tear (Terms & Conditions, clause 7.1(b)). This is in addition to your rights under the Australian Consumer Law, which cannot be excluded.
- 30-day change-of-mind returns on eligible items: unused, uninstalled and in the original packaging, with a Return Authorisation from us first. A 15% restocking fee applies and return postage is at your cost.
- Wrong fit: if a part covered by our Fitment Guarantee doesn’t fit, we pay the return freight both ways and there’s no restocking fee.
- Special-order or imported-to-order items, electrical parts, ECUs and tuners once registered, connected or flashed, parts that have been fitted or modified, and clearance items can’t be returned for change of mind. Your rights for faulty goods still apply.
- Refunds are made to your original payment method within 14 business days of us receiving and inspecting the return.
Full details: Returns & Refund Policy and Terms & Conditions.
Randy’s Transmissions limited warranty. Randy’s also publishes its own limited warranty, which depends on the build: 2 years / unlimited miles on Stage 1 and 2 builds, 1 year / 12,000 miles on Stage 3 and 4 builds, and 12 months / 12,000 miles for hot shot and plow trucks. Under Randy’s terms its warranty repairs are carried out at Randy’s in Utah, USA. Where Randy’s term is longer than ours, the longer term applies on Randy’s terms (Terms & Conditions clause 7.1(d)).
Fitment can be arranged at our Oxley or Warana workshops.
Read the full Randy's Transmissions warranty terms →
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.





