SDP Built Allison 1000 Transmission with Billet Torque Converter
*Freight includes shipping BOTH ways and it must be a commercial address with a forklift or extra shipping charges may be applied.
This Allison 1000 is built in house to the highest of standards and includes a Goerend triple disc billet torque converter. All of our Allisons are built the same (clutch pack stackup) whether you're looking for a 1000+RWHP truck or you're looking for a reliable transmission for your 500HP daily driver. Our transmissions have been in several dozens of 1000+RWHP trucks with lots of abuse drag racing, dyno runs and sled pulling all on the same build for a full season. No matter your power level or what you do with the truck, we use the most robust clutch pack combinations possible, which is why we feel more than comfortable with being able to offer the lifetime warranty for an additional cost in sub 650rwhp applications. We set them up according to your predicted power level and we can add billet shafts/hub, C3 PTO oiling holes or a pan for the cost of parts. It is preferred to use your current transmission that is in your truck but we do have over 100 cores on the shelf which we can use to build one to order with specs for your truck and how you drive. Current lead time is 2-4 business days, please call or email to verify.
- Billet Goerend triple disc converter (billet stator options as well)
- Mix of Raybestos GPZ PRO clutches with thick steels and Alto Carbonite
- 2011+ Allision parts for quicker shifts
- Modified Converter flow valve in pump
- Ratiotek parts in pump and valve body
- Sonnex upgrades in pump and valve body
- Transgo Shift kit + reconditioned valve body
- Upgraded shift valve springs in valve body to give us even quicker, smoother shifts than before
- Added oiling holes to clutch packs
- New gaskets + filters w/ filterloc kit
- Billet C2 hub is recommended past 650rwhp or you risk damaging splines on the P2 planet
- Billet P2 planet is required above 900rwhp, recommended when doing a billet C2 hub
- Billet input and output are extra, required above 900rwhp
-Powder coating the unit is $425. If this option is selected, please tell us your color choice in the order comments.
We can have your transmission shipped to us to build, or build one of our cores to your specs and ship it to you. Contact us regarding shipping costs and times. Our fixed rate of $675 is for round trip freight (to you and your core back to us is included) if going to a commercial address with a forklift. If you send your transmission to us on an open pallet, we charge $100 extra for the crate that it will be returned to you with, the transmission must be crated to have insurance on the shipment.
*We recommend that you add an aftermarket transmission cooler if you plan to tow heavy in higher temperature climates (factory or AN lines only, we do not approve of crimping soft hose to the factory hard line as it will blow off over time with the added pressure and cause failure).
*The core must come back in rebuild-able condition in order to qualify for the full core refund. This includes but not limited to; planetaries, pump housings, shafts, gears, housings etc. Please allow 4-5 business days for inspection before the core refund begins processing.
*The Powdercoating option will add at least 1 week to the current build time. If you select a Goerend Pan and powder coating, the pan will be coated to match, the Mag-Hytec pan will be left in their standard black powder coated color unless otherwise discussed.
Custom Power coat Color Options- Here
31 Reviews Hide Reviews Show Reviews
Scott was great to work with and easy to communicate with! I gave him a call and he set me up with the right Allison build right away. All the shipping and work was done on time. After installing the trans, my truck runs better than ever. The shifts are smooth and very quick. I would definitely recommend an SDP Allison trans for any Duramax!
Scott worked with my schedule and had my truck in and out in 24 hours on less than a weeks notice. The trans shifts great and Scott has a 3 year/unlimited mile warranty that lets me know he’s as confident in this trans as I am. Great work by great people. Thanks SDP
Top notch craftsmanship! Had some shipping issues but Scott took time out of his busy schedule to make certain I was taken care of in a timely fashion. Transmission shifts like butter considering it’s built. Scott is a class act and was more that generous with his valuable time to explain what his build process is not many companies will do that. Highly recommend this product to anyone wanting real quality apposed to the competitors empty promises.
Great trans for getting the power to the ground.
These guys are top notch! Had my LML transmission rebuilt in 1 weeks time. Scott the owner was super helpful throughout the process and was always available my phone/email to answer questions. Outstanding warranty on their rebuilt transmissions! Couldn’t ask for a better experience.
Awesome customer service, transmission works better than new. I will not hesitate to go back for any other items I need and will refer any Allison owner to them.
I waited to review the rebuild for 1 year to see how the transmission would hold up to over 15,000 miles of heavy hauling, long trips, and a heavy foot. I 100% recommend Scott and his crew to take care of customers with rock solid transmission and Duramax work. They had my truck in and out of the shop in about 24 hours when I was prepared to leave it for a week. My LBZ and I were taken care of perfectly. The trans shifts firm and I have no worries about it's function. SDP recommended a few upgrades to the transmission and talked me out of unnecessary expenses that wouldn't benefit me. They also sent me with an extra filter to change after break in and answered all questions I had about my EFI live and heavy towing. I added a 200hp tune and the trans doesn't miss a beat! I also had SDP upgrade my transfer case pump while the trans was out to save more money and avoid future problems. Do it! These guys are great!
Great tranny,shifts are crisp and customer service is phenomenal. Wouldn't buy any other trans these are top of the line!!
Transmission feels very solid while driving. Have over 10k miles on mine and its been flawless. Best thing I have ever done to my duramax.