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Turbo 350 TH350 Transmission Heavy Duty 4WD 4x4, Custom Built Monster
Turbo 350 TH350 Heavy Duty 4WD 4x4 Transmission

Turbo 350 TH350 Transmission Heavy Duty 4WD 4x4, Custom Built Monster


Custom built to handle up to 400hp/350tq.


Questions? Call Us 800-708-0087

Build Your Order Online

Torque Converter
Shift Firmness
Case Color (shades may vary*)
Output Shaft Length (End of case to end of shaft)
Pan Style
Case Type
Core and Warranty Options (Please Select One)
A) We'll pick up and Build Your Original Core - 3 Yr Warranty activated when order ships [+$100.00]
B) Return your core using our Core Return Service within 30 days of shipment - 3 Yr Warranty activated when core received [+$225.00]
C) No Core will be returned - Pay Core Fee to Activate 3 Yr Warranty [+$500.00]
Warranty Information (Check Box to Acknowledge)
All warranties are contingent upon core returns and/or fees. If the Transmission & Converter cores are not returned within 30 days or a core fee is not paid I am opting out of any warranty coverage.
6 Year Warranty
Call me to add 6 year warranty to my order.
White Glove WOWanty Upgrade
Popular Accessories (These have been Discounted for your transmission package!)
12 Qts. of Burn Rubber Brewery Premium Synthetic Trans Fluid [+$149.93]
Kickdown Cable [+$35.00]
Locking Fillertube & Dipstick [+$39.00]
Trans Cooler Kit #1403 [+$49.95]
Torque Converter Bolts (3) [+$9.99]
Universal Dust Cover [+$25.00]
Transmission Flush - Dr. Tranny Kooler Kleen [+$19.98]
Give Me A Name
Be a MonSTAR and Upload a picture of your vehicle.
Time commitments may vary as this is a custom built transmission

Mega Monster Transmissions
Engineered to Dominate, the Turbo 350 Mega Monster transmission is tough enough to withstand the rigors of even the toughest street machines delivering tire-spinning shifts race after race. It is ideal for vehicles powered by engines producing up to 400 horsepower with a non-supercharged system using pump gasoline. Equipped with a Manual/Automatic valve body, most units allow you to manually shift the vehicle into each gear change or, by placing it in the drive position, remain fully automatic. In either mode, you get a racetrack shift that bangs through the gears giving you all the right to say "Eat My Shift!". When you use the manual gear selection feature, the Mega Monster upshifts and downshifts when you move the shift lever. When you select the normal drive position, the transmission retains its firm, automatic shifts for the ease of driving you look for in an automatic transmission. The Turbo 350 is a 3-speed automatic transmission.

The Mega Monster Transmission features: the latest technology in our industry with only the best internal components for increased strength, dependable performance and monster torque capacity. All Monster transmissions are custom made in the USA and quality checked to ensure your peace of mind. For the system to operate properly, all throttle linkage, vacuum lines and kick-down components must be connected and adjusted properly.


*Special Note: If you are planning a direct transmission swap it is recommended to re-use your existing extension-housing and speedometer gear for your new unit. This Monster 700R4 Transmission does not come equipped with a new Speedometer Gear. Certain vehicle specific extension-housings may not be available with this unit. In most cases, you will be required to swap your original extension-housing (this will NOT void your warranty). Please Contact Us to purchase a proper speedometer gear for your application or if you are unsure if your extension-housing will need to be reused.

***Not recommended for Big Block applications.

I ordered a th350 and had it custom built for pulling and a stage two shift kit also 4 quart inner cooler and schaeffer's transmission fluid. best transmission i have ever owned. of course the th350 is one on chevy's best transmission made, bottom line best built transmission. I think people should know how a transmission works and what they are built for before ordering transmission. You can buy a bigger transmission or build one that is already great.
Verified Buyer: 
I just got it in the truck and only drove it 30 - 40 miles but I i can tell its a big difference in the old one. Kelly help me out with eveything I need and it bolted right in with no modifications to crossmembers needed. the tranny handles the truck. Here is a short video of the tranny in the truck. Thank you again. very pleased with product and monster transmission. Dynamic customs of lufkin,tx I will not use again, but will use monster transmission again for future projects.
Verified Buyer: 
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