Family-owned since 19942271 W Evans Ave, Denver
Transmission repair and rebuilds in Denver.
Adam Lightfield's shop rebuilds automatics, manuals, differentials and 4x4 drivetrains for cars, trucks, diesels and RVs. Every job starts with a free 27-point inspection and diagnostic scan.
- 4.8 on Google
- From 223 reviews
- 3 yr / 36,000 mi
- Nationwide warranty on rebuilds
- Free towing
- In most cases within the Denver metro
Everything between the engine and the wheels.
Wizard specializes in a few things and works on every make: foreign and domestic, cars to motorhomes.
All services- 01
Automatic transmission rebuilds
Complete rebuilds with original equipment parts, updated parts where the design needs them, and a full flush of the cooling system.
- 02
Manual transmissions and clutches
Full or partial rebuilds with new shafts, gears, forks, synchronizers and bearings. Clutches, CV joints and axles too.
- 03
Differentials and re-gearing
Soft overhauls, complete overhauls with a new ring and pinion, and re-gearing for trucks running oversized tires.
- 04
4x4, AWD and transfer cases
Engagement problems, leaks, transfer case service and locking hubs on four-wheel and all-wheel drive vehicles.
- 05
RVs, motorhomes and diesels
A lift rated for more than 30,000 lb, and custom rebuilds with auxiliary cooling for anything that tows.
What happens during the free 27-point diagnostic.
It takes about three to four hours, and it's the reason the estimate you get is accurate. If you decide not to go ahead, you pick the vehicle up and owe nothing.
Computer scan
A scan tool reads the transmission's electrical system and stored codes.
Fluid check
Level and condition of the fluid tell us a lot before anything comes apart.
Road test
A technician drives it and works to reproduce exactly what you've been feeling.
On the lift
We drop the pan or pull the inspection plug and look at the transmission itself.
Your estimate
You get an accurate number and decide. Go ahead, or pick it up free of charge.
3 years or 36,000 miles, then free service for as long as you own it.
After a Wizard rebuild, the fluid, filter and flush are done free every year. We ask that you keep up the free services for at least the first three years as part of the warranty.
Wizard is an ATRA member, and the warranty is nationwide. If something comes up on a road trip, you're still covered.
| 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. |
| Differential repairs | 2 years or 24,000 milesPlus free annual maintenance for as long as you own the vehicle. |
| 4WD and AWD rebuilds | 2 years or 24,000 milesPlus free annual service for as long as you own the vehicle. |
| Coverage area | NationwideBacked by ATRA's Golden Rule warranty, honored at member shops across the U.S. and Canada. |
A few of the cars and trucks that have been through the bays, from Wizard's Facebook page.
Adam built his first transmission when he was 15.
He has been rebuilding them ever since, and Wizard is still a family-owned shop.
- Age 15Adam builds his first transmission.
- SchoolWyoming Tech, then work for a string of shops and mentors.
- Mid-1980sRebuilding transmissions with Joe Cashman in Fort Collins, then Loveland.
- NextSix years at AAMCO in California, completing his certifications.
- 1991Home to Colorado, managing the shop and building transmissions at A.C. Transmission.
- 1994Opens Wizard Transmission at 1790 South Broadway, with his parents' backing.
- 1999Buys a bigger property: five bays up front and a separate rebuild shop in back.
4.8 stars from 223 Google reviews.
“A diesel mechanic informed me my transmission and transfer case needed to be replaced. Wizard took a look and told me they could not find any significant issues and recommended to do nothing. Adam did not charge me.”
“I trusted him with my custom supercharged gen5 Camaro, which their shop rebuilt the manual transmission with upgraded internals flawlessly. It now shifts better than when I first bought the car.”
“Thank you for the great work, awesome conversation, and helping my husband and I get our truck on the road within a couple of days.”
Excerpts from Google reviews, as of October 2026.
Questions people ask before they call.
Updated October 2026.
- How much does a transmission diagnostic cost at Wizard Transmission?
- Nothing. Every vehicle gets a free 27-point inspection and diagnostic scan. It takes about three to four hours: a computer scan, a fluid check, a road test, then a look inside on the lift. You get an accurate estimate, and if you decide not to go ahead, you pick the vehicle up at no charge.
- Why can't you quote a transmission repair over the phone?
- There are more than ten times as many transmission designs on the road as there were twenty years ago, many with several versions, and nearly all are computer controlled. The problem may not be in the transmission at all. An honest number means identifying the exact unit and finding the actual fault, and that takes testing in the shop.
- What warranty comes with a transmission rebuild?
- Rebuilds carry a 3-year, 36,000-mile warranty that is honored nationwide through ATRA's Golden Rule program. After a rebuild, the fluid, filter and flush are done free every year for as long as you own the vehicle. A 3-year, 100,000-mile upgrade is available if you ask.
- Do you tow vehicles to the shop?
- Yes. Towing is free in most cases within the Denver metro area, and available at a competitive or reduced rate from outside the city. Call 303-733-8494 to set it up.
- Do you work on RVs, motorhomes and diesels?
- Yes. The shop has a lift rated for more than 30,000 lb for RVs and motorhomes, and works on foreign and domestic cars, trucks, SUVs and diesels. Towing rigs and high-performance cars can get a custom rebuild, including an auxiliary transmission cooler.
- What are the signs a transmission needs attention?
- Gears that are hard to engage or slip in drive, an engine that races, grinds or shakes, a manual clutch that isn't working right, reddish fluid under the vehicle, a sweet burning smell, or a Check Engine light. Any of these is worth a free diagnostic before it turns into a bigger repair.
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.