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48 Years
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Your Trusted Transmission Repair Experts in Corpus Christi
Since 1978, Greatstate Transmissions has been dedicated to providing honest and quality repair services to Corpus Christi drivers. As a Christian, family-owned and -operated business, we prioritize customer relationships and maintain a strong focus on integrity and satisfaction. Our team of experienced technicians delivers reliable transmission repairs and maintenance, backed by a 3-year/75,000-mile warranty on most transmissions. We offer free assessments with repairs to help customers make informed decisions about their vehicle's health. Recognizing the challenges of South Texas driving conditions, we provide local towing for major repairs to ensure customer safety. Accredited by the Better Business Bureau and ATRA certified, we combine cutting-edge technology with ethical practices to deliver trustworthy solutions.

Our services extend to automatic, manual, and Allison transmissions for vehicles ranging from compact cars to heavy-duty trucks. Through continuous training, our technicians stay current with evolving automotive technology to diagnose complex issues accurately. We remain committed to keeping repair costs reasonable while maintaining top-quality service standards, even during economic uncertainty. For over four decades, our community has relied on us for transparent communication, expert diagnostics, and dependable transmission care.
Services
Automatic Transmission Repair Manual Transmission Repair Clutch Repair Allison Transmission Repair Differential Repair U-Joints Replacement Drive Axles Service Flywheel Replacement Engine Rear-Main Seal Repair Fleet Vehicle Maintenance
Details
  • Year established: 1978
Highlights and features
  • Family-owned since 1978 with proven industry experience
  • BBB Accredited business with ethical repair practices
  • ATRA Certified technicians for advanced diagnostics
  • Free assessments included with all transmission repairs
  • Local towing available for major transmission emergencies
Associations and certifications
  • BBB
  • ATRA
What people say
Fix it right first time Friendly and trustworthy people Great work at fair price No hidden fees Expert technicians
Services
Automatic Transmission Repair
Specialized repair services for automatic transmissions using advanced diagnostics and quality replacement parts. Our technicians address slipping gears, torque converter issues, and hydraulic system failures to restore optimal vehicle performance. Backed by a 3-year/75,000-mile warranty for customer peace of mind.
Clutch Repair
Expert diagnosis and repair of clutch systems including replacement of worn components and hydraulic system maintenance. We ensure smooth gear transitions and improved driving performance using manufacturer-approved parts and techniques for both standard and performance vehicles.
Allison Transmission Repair
Specialized maintenance and repair for Allison transmissions in commercial vehicles and heavy equipment. Our certified technicians perform complete system diagnostics, fluid exchanges, and component replacements to maintain fleet vehicle reliability and longevity.
Differential Repair
Comprehensive differential inspection and repair services to address unusual noises, vibration, and handling issues. We service both front and rear differentials for cars, trucks, and SUVs using precision tools and quality lubricants.
Fleet Vehicle Maintenance
Customized maintenance programs for commercial fleets including scheduled inspections, transmission fluid changes, and preventive repairs. We offer competitive fleet pricing and dedicated service coordination to minimize vehicle downtime for business operations.
Questions
What types of transmissions do you service?
We service automatic, manual, and Allison transmissions for both domestic and foreign vehicles including cars, trucks, RVs, and commercial fleet vehicles.
Do you offer warranties on repairs?
Yes, most transmission repairs are backed by a 3-year/75,000-mile warranty to ensure customer confidence in our workmanship.
Can you diagnose transmission issues?
Our ATRA-certified technicians use advanced diagnostic equipment to identify transmission problems and provide accurate repair recommendations.
Do you provide towing services?
Yes, we offer free local towing for major transmission repairs to assist customers with vehicle emergencies.
Are financing options available?
Yes, we offer financing through Synchrony Financial to help customers manage unexpected repair costs.
How can I schedule an appointment?
Call us at (361) 855-4637 during business hours or visit our website to request service online.
Reviews (7)
Barry Bennett
May 17, 2022 Report
My wife took one of our cars in to get the transmission fluid replaced. The work was fine, but she felt that it took longer than it should have. Part of this was because one of the employees, Luis, went back and started conversing with the mechanic who was supposed to be doing the work. She said she had to go back to the bay to get them to bring the car out. They were finished with it, but it was still in the bay.
LeeAn Benavides
May 16, 2022 Report
Great state made me an appointment quickly. Luis was very attentive and super helpful. Dropped my vehicle off at 3:30 and it was ready in an hour. Performed a transmission fluid and filter change on a 2012 Ram 2500. Their lobby has a few chairs and water bottle service. Very clean.
Marco Chapa
Feb 10, 2022 Report
This place gives top notch service. Staff is very friendly and helpful. Honesty and integrity definitely is experienced here. Fast quick service was in and out in less than an hour. Price is very affordable. Will definitely be going back for service on all my vehicles.
Santa Benavides
Oct 26, 2021 Report
Great service even though I was down to one vehicle for 2 weeks. Getting to and from work was hard. The only inprovement needed is communication it took longer than anticipated. They need to call more often.
Sailing Anne
Oct 24, 2021 Report
Says free assessment but the next day they say they need more time to diagnose and that costs extra sounds like scam bs
Guy Deweese
Aug 14, 2021 Report
Critical: Professionalism, Punctuality, Quality, Value The owner, Mark Rittgers and mechanic Derek Rittgers along with their service representative did not stand behind their work or service. Payed them 3000 cash and waited 5 weeks for my truck and they did not do the agreed upon repairs. Would never recommend their services for anything. Services: Oil change, Transmission, Check engine light diagnostic
Jimmy Garcia
Jun 30, 2021 Report
Had a bad experience! Spoke to an employee who gave me one price, then wanted to charge me up! I felt that their diagnosis was the same thing they told me at O'Reilly's for free. Great state charged me 110 dollars for the same thing O'Reilly's told me, then wanted to charge me an extension diagnosis, because, they needed to drop the pan to do diagnosis. Which is why I noticed red flags. Sorry, this was just my experience. I pray y'all have a better one.