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Conquer any challenge with the StreetMonster 68RFE transmission—a 6-speed automatic powerhouse built for heavy-duty trucks and high-torque diesel engines. Designed for rugged durability and smooth performance, the 68RFE is your go-to solution for towing, hauling, and demanding workloads. Engineered with advanced technology and reinforced internals, this transmission delivers long-lasting reliability and efficient power delivery, making it the ultimate upgrade for your truck.
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Just installed. Fast shipping, got it before Christmas when my transmission went out the week before Christmas. Thank you to JC for helping make this as painless as It could be.
Great customer support and product
Ordered and received the transmission within a week. Installation by my shop went smoothly, but had to work out the tune after a couple of days of driving. All good now. Scheduling the core return was also easy. Great price and included the fluid.
Great service. got transmission quickly. Was always there to answer questions.
Got the transmission quicker so they said I would receive it instruction manual with what I needed was good information took me about nine hours to change transmission and transmission cooler shifts seem to be good so far
In-stock transmissions usually ship the next business day.
Custom builds or out-of-stock units typically ship within 4–6 weeks.
Need it sooner? Call us — we can often make special arrangements.
We offer the most comprehensive coverage in the industry:
Extend warranties are included on all Transmission Purchases read more HERE.
No — we offer a $299 Flat-Rate One-Way Shipping to any address, commercial or residential.
If you find a better rate, you're welcome to arrange your own shipping.
Our 68RFE transmissions are built to handle significantly more power than stock — each tier is designed for a different level of performance:
All units are dyno-tested and engineered for long-term durability and consistent performance.
All of our 68RFE builds include an upgraded heavy-duty torque converter, with features depending on the build level:
These converter upgrades provide improved lockup, reduced heat, and greater torque capacity compared to the factory unit — essential for towing, performance, and high-horsepower applications.
Yes — all critical electronics and sensors are either replaced or fully remanufactured during our build process:
This ensures precise shifting, consistent pressure control, and full communication with your vehicle’s ECM/TCM.
Yes — proper tuning is essential for the 68RFE to perform correctly and avoid premature wear or failure.
⚠Without proper tuning, you may experience harsh shifts, flare, or limp mode. We strongly recommend professional calibration.
No — fluid must be purchased separately. We offer special discounted prices and even cheaper shipping options when you bundle with our fluid at checkout.
Returning your core is simple. Once you are ready to return your core, you can initiate the return process in one of two ways:
Please Note:
Our goal is to make this process as seamless as possible — if you have questions about your core return, just give us a call.