Jerry & Mary Ellen Heirigs

Jerry has always dreamed of owning his own repair shop since he graduated from Mitchell Vo-Tec. He spent several years working at a transmission shop and a dealership preparing him for the opening of J & M Transmission in August 1993. Jerry started J & M as the owner, builder and janitor. As the business grew and the automotive industry changed, J & M service expanded to include general repair and added several staff members. Today we have 6 employees and an 8400sq. foot air-conditioned shop. “We are a full service repair shop that fixes the whole vehicle not just the transmission.

We are committed to customer’s service! With that being said, not only do we shuttle customers but we also offer at no additional cost, free vehicle pick-up. So in other words, J & M will pick up your vehicle while you’re working, service it, and then return it back to your work or home all without you leaving your office chair.

After 20 years of nursing, Mary Ellen decided it was time to join the family business. In spring 2004, she started working with our customers and taking care of the marketing and advertising. When asked if she misses nursing she says “No! When customers call and the vehicle are broken down it’s a big problem. So whether it’s a phone call with a sore toe or a broken down vehicle, we need to help fix the problem.”

We have been married for over 36 years. Our youngest son, Jeremy graduated from Southeast Tech with a degree in Collision Repair and is working for ABRA North in Sioux Falls. Jeremy is restoring a 1966 Ford LTD 2 door hard top with his dad.

Service Advisor

Justin Ymker

Justin joined J & M Transmission in 2015 with over 12 years’ experience in automotive parts industry and 6 years in management. At J & M, Justin is now a Service Advisor helping out in the front office. Justin lives in Sioux Falls with his wife Kristel and enjoys woodworking and fishing. Justin and Kristel are parents to a little boy, Finn, who is a precious 3 year old keeping the parents running as well as his older sister Bella who likes to help out with Finn.

Customer Greeter


I am a Boston Terrier and Beagle mix and I am the official customer greeter! I love to chase leaves and bunnies when I am outside. When you come to J & M, you can play tug of war with me…..please!