Transmission repair and rebuilds in Denver.
Wizard Transmission has repaired and rebuilt automatic and manual transmissions in Denver since 1994, for foreign and domestic cars, trucks, SUVs, diesels and RVs. It starts with a free 27-point inspection and diagnostic scan, and rebuilds carry a 3-year, 36,000-mile nationwide warranty.
When should a transmission get looked at?
Modern transmissions are hundreds of electronic and hydraulic parts working together. These are the warning signs that one needs attention soon:
- Gears are hard to engage, or slip while in drive
- The engine races, grinds, shakes or makes noises it didn't before
- The clutch on a manual transmission isn't working right
- Reddish fluid is leaking under the vehicle
- You notice a sweet burning smell
- The Check Engine light is on
Overheating and loss of lubrication cause most transmission failures, so every repair here is aimed at keeping yours cool and properly lubricated.
What the work includes.
Automatic transmissions
- Complete rebuilds using original equipment manufacturer parts
- Repair and upgrade of damaged systems, with updated parts as needed
- Full flush and cleaning of the transmission cooling system, a weak spot in many designs
Manual transmissions
- Complete or partial rebuilds with new shafts, gears, forks and gaskets
- Synchronizer, small parts and bearing kits
- Clutches, CV joints and axles, differentials and drive axles
Towing and performance
- Custom rebuilds specified for extra load
- Auxiliary transmission cooling for vehicles that tow
- High-performance cars are a particular specialty
RVs, motorhomes and diesels
- Two buildings, five bays
- A lift rated for more than 30,000 lb for RVs and motorhomes
- Foreign and domestic, gas and diesel
The warranty on a Wizard rebuild.
3 years or 36,000 miles, honored nationwide through ATRA, with the fluid, filter and flush done free every year you own the vehicle.
| Transmission rebuilds | 3 years or 36,000 milesPlus free annual service for as long as you own the vehicle. |
|---|---|
| Upgrade | 3 years or 100,000 milesAvailable on request. Ask about it when you call. |
| Coverage area | NationwideBacked by ATRA's Golden Rule warranty, honored at member shops across the U.S. and Canada. |
Transmission repair questions.
Updated October 2026.
- How much does a transmission rebuild cost?
- It depends on the transmission, its version and what failed, which is why we don't quote over the phone. The free diagnostic finds the actual fault, then you get an accurate estimate before any work starts.
- Do you use new or used parts?
- Complete automatic rebuilds use original equipment manufacturer parts, with updated parts fitted where the design needs them. Manual rebuilds include synchronizer, small parts and bearing kits.
- Can you build a transmission for towing?
- Yes. For towing and high-performance vehicles, the transmission is rebuilt to a custom specification for the extra load, and an auxiliary cooler can be added to keep temperatures down.
Bring it in, or have it towed in.
Call ahead and we'll plan for your vehicle. The diagnostic is free, and nothing gets fixed until you say so.
- Hours
- Monday to Friday, 7:00 am to 5:00 pm
Closed Saturday and Sunday - Phone
- 303-733-8494
- Towing
- Free in most cases within the Denver metro. Reduced rate from outside the city.