Unlock the next level of performance with Monster’s 8L90 transmission—a modern 8-speed automatic built for strength, precision, and long-term durability. Featuring a brand-new OE torque converter, a redesigned valve body accumulator to reduce wear, new OE internal harness and sensors, and fluids included, this is the confident upgrade for smooth shifting and dependable power transfer.
Note
I have roughly 800 miles on the new trans and converter. Shifts smooth and clean. No vibration/shudder,no gear hunting. Pretty smooth process very happy
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 $364 Flat-Rate One-Way Shipping to any Address.
If you find a better rate, you're welcome to arrange your own shipping.
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 your old transmission is ready for pickup, you can start the return process online or call our Customer Service Team.
Please Note:
Our goal is to make this process as easy as possible. If you have questions about your core return, give us a call and we’ll help.
Start Core Return