# #8 in Houston: National Transmission

Ost / South Union · since 1979 · 4.7 rating from 270 reviews

Score: 89/100. Data as of November 11, 2026. How the ranking works: [method](https://bestautorepairshops.com/method/) (markdown: https://bestautorepairshops.com/method/index.md).

## Contact

- Address: 4420 Griggs Rd, Houston, TX 77021
- Phone: [(713) 489-4091](tel:+17134894091)
- Website: https://www.nationaltranshouston.com/
- Google profile: https://maps.google.com/?cid=13164631360358474179

### Hours

| Day | Hours |
|---|---|
| Monday | 8 AM to 6 PM |
| Tuesday | 8 AM to 6 PM |
| Wednesday | 8 AM to 6 PM |
| Thursday | 8 AM to 6 PM |
| Friday | 8 AM to 6 PM |
| Saturday | Closed |
| Sunday | Closed |

## Score breakdown

| Score | Points | Detail |
|---|---|---|
| Review cadence | 25/25 | 57 reviews in the last 12 months, in 12 of 12 months |
| Review sentiment | 19/25 | Rated 4.7 from 270 reviews; 98% of last-12-month reviews at 4-5 stars; 29 reviews say the work was done right, 1 says it failed; 10 call the price fair or the shop honest, 0 say it overcharged or was dishonest; 16 say the shop kept them informed, 0 say it left them without answers |
| Capabilities | 20/25 | 16 of 20 checklist items |
| Years of experience | 25/25 | Founded 1979, from their Google profile |
| Total | 89/100 | |

## Checklist: 16 of 20 items found

### Services

- [x] Oil change: Google profile
- [x] Brake repair: Google profile
- [x] Transmission repair: Google profile
- [x] Air conditioning repair: Google profile
- [x] Engine diagnostics: Google profile
- [x] Wheel alignment: Google profile
- [x] Tire service: Google profile
- [x] State inspection: Google profile
- [x] Diesel repair: website
- [ ] Collision repair: not found

### Makes

- [x] Ford: website
- [x] Chevrolet: website
- [x] Toyota: website
- [x] BMW: website
- [x] Mercedes-Benz: website

### Certifications

- [x] ASE certified technicians: Google profile
- [ ] AAA Approved Auto Repair: not found

### Amenities

- [x] Warranty on repairs: website
- [ ] Shuttle or loaner car: not found
- [ ] Towing: not found

## What customers say

Too few reviews to summarise.

## Where it ranks

- [#8 of 7344: Best auto repair shops in Houston](https://bestautorepairshops.com/houston/#rank-8)
- [#1 of 31: Best auto repair shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/#rank-1)
- [#8 of 5574: Best oil change shops in Houston](https://bestautorepairshops.com/houston/oil-change/#rank-8)
- [#8 of 4243: Best brake repair shops in Houston](https://bestautorepairshops.com/houston/brakes/#rank-8)
- [#8 of 3173: Best transmission repair shops in Houston](https://bestautorepairshops.com/houston/transmission/#rank-8)
- [#8 of 3619: Best air conditioning repair shops in Houston](https://bestautorepairshops.com/houston/ac-repair/#rank-8)
- [#8 of 3695: Best engine diagnostics shops in Houston](https://bestautorepairshops.com/houston/engine-diagnostics/#rank-8)
- [#8 of 1938: Best wheel alignment shops in Houston](https://bestautorepairshops.com/houston/wheel-alignment/#rank-8)
- [#7 of 2321: Best tire service shops in Houston](https://bestautorepairshops.com/houston/tires/#rank-7)
- [#7 of 1471: Best state inspection shops in Houston](https://bestautorepairshops.com/houston/state-inspection/#rank-7)
- [#4 of 684: Best diesel repair shops in Houston](https://bestautorepairshops.com/houston/diesel/#rank-4)
- [#7 of 323: Best Ford repair shops in Houston](https://bestautorepairshops.com/houston/ford/#rank-7)
- [#7 of 246: Best Chevrolet repair shops in Houston](https://bestautorepairshops.com/houston/chevrolet/#rank-7)
- [#7 of 240: Best Toyota repair shops in Houston](https://bestautorepairshops.com/houston/toyota/#rank-7)
- [#8 of 312: Best BMW repair shops in Houston](https://bestautorepairshops.com/houston/bmw/#rank-8)
- [#8 of 295: Best Mercedes-Benz repair shops in Houston](https://bestautorepairshops.com/houston/mercedes-benz/#rank-8)
- [#1 of 24: Best oil change shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/oil-change/#rank-1)
- [#1 of 17: Best brake repair shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/brakes/#rank-1)
- [#1 of 11: Best transmission repair shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/transmission/#rank-1)
- [#1 of 13: Best air conditioning repair shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/ac-repair/#rank-1)
- [#1 of 14: Best engine diagnostics shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/engine-diagnostics/#rank-1)
- [#1 of 6: Best wheel alignment shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/wheel-alignment/#rank-1)
- [#1 of 9: Best tire service shops in Ost / South Union](https://bestautorepairshops.com/houston/ost-south-union/tires/#rank-1)

## Nearby shops

- [National Auto Care](https://bestautorepairshops.com/houston/national-auto-care/): Ost / South Union, 28/100
- [D&V Auto Repair Complete Auto Repair](https://bestautorepairshops.com/houston/d-and-v-auto-repair-complete-auto-repair/): Ost / South Union, 18/100
- [S.M.I.T.H AUTO](https://bestautorepairshops.com/houston/s-m-i-t-h-auto/): Ost / South Union, 26/100
- [P & W Automotive](https://bestautorepairshops.com/houston/p-and-w-automotive/): Ost / South Union, 1/100
- [Tire repair service](https://bestautorepairshops.com/houston/tire-repair-service/): Ost / South Union, 15/100