Southern Maryland’s St Marys, Calvert & Charles County’s Premier Automatic Transmission Repair Rebuild & Auto Repair Shop

We Love Trucks!!


From Dodge Caravans to Heavy Duty Ford, Chevy and Dodge Performance Trucks

I Am Your Custom Transmission Guy for All Your Needs You Do Not Need to Go Online for Your Custom Transmissions



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Hours: Mon - Fri: 8am - 5pm • Sat: 8am - 2pm
Closed Sunday


At Hollywood Transmissions and Automotive LLC, in Southern MD’s St Marys County we love showing the customer the craftsmanship during the process via text videos; even including commentary if wanted. None of the chain auto trans shops are doing this. Our upgrades include the best on the market parts as well as fluids.


Hollywood Transmissions & Automotive LLC, is a locally owned and operated wholesale and retail automatic transmission rebuild, repair full service auto transmission and auto repair shop for cars, trucks, SUVs, 4x4s, for 4 cylinder, 6 cylinder, 8 cylinder engines in the Southern Maryland, St Marys, Calvert and Charles County MD areas.


Let Us Keep Track of Your Vehicle’s Health So You Know Your Car is Dependable from Front to Back!



We Do Not Provide Ship Outs…
We Do It All Start to Finish Installed in Vehicle


About Us


Our Owner, Dave Parks, who was practically raised in the transmission business, is the son of Glen Parks who has his own business in Charlotte Hall. Since 1977, he has provided the best in transmission repair rebuild services and auto repair in the Southern Maryland area.


10 Reasons to Choose Us:

  1. We rebuild your transmission!
  2. We custom build our own torque converters.
  3. Each transmission gets all updates and correctional shift kit.
  4. Each transmission gets all new electronics.
  5. Known work areas are improved with performance parts where needed.
  6. We eliminate the need to replace radiator cooler for transmission or bypassing radiator with external cooler by using our Hot Flush machine* (one of the few shops to have this service). *The hot flush machine shoots hot transmission fluid at 180 degrees with air back and forth through the cooler until the microscreen shows there is no more debris from the transmission failure.
  7. The advantage in the transmission industry is being able to control your quality by rebuilding your own converter like Hollywood Transmission does - not purchasing one that you do not know what quality product you are buying.
  8. We provide general auto repair work as well.
  9. Dave takes you into the shop to show you exactly what is wrong with your transmission.


Our Southern MD Transmission & Auto Repair Services


Transmission Repairs & Services:



  • U-Joints
  • Warranty Service
  • Specializing In Small Trucks 2WD & 4WD
  • Free Road Tests
  • Estimates
  • Towing is Available
  • Cooling Lines
  • CV Axles
  • Electronic Controls
  • Engine RPM
  • Exhaust System
  • Fluid Leaks and Retention
  • Manual Linkage
  • Neutral Switch
  • Throttle Linkage
  • Transmission Mounts



Transmission Rebuild So MD


Note: We do not repair or replace all transmissions. Please call to verify whether we can work on your vehicle. There are too many different transmissions on the road today for us to keep up with.

Call us 301-373-2147 or email us hwdtrans2@yahoo.com with your questions!


Calvert auto transmissions
Auto Transmissions Charles
So MD Auto Repair
St Marys Transmissions



Special Replacements & Upgrades to Our Transmission Work


St Marys Hardened splined hub

Hollywood Transmissions installs within the converter turbine a hardened splined hub and we use solid rivets and tigs weld it for added strength.


Hollywood billet back bowls

Hollywood Trans use billet back bowls of converter for improved stability for triple clutch applications to reduce wear and cracking.


So MD Bearing caps

Plastic end cap thrust washers are removed and special bearing caps are installed.


Broken Converter Neck MD

We install heavy duty converter necks to prevent breakage like this.


So MD Furnace Braised Turbines

Our top cover and turbines are furnace braised with heavy duty bearings.


So MD Heavy Duty Converter Necks

When complete, it's 100% stronger than stock converter.


Call us 301-373-2147 or email us hwdtrans2@yahoo.com with your questions!


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Sonnax logo  TransGo logo  Transtec logo  BorgWarner logo


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