Had a talk with a transmission shop owner that shook me up

I was at a local parts store in Raleigh last Tuesday picking up oil filters when I got to talking with an older guy who runs a transmission shop. He told me he's seeing more and more cars with 80,000 miles come in needing full rebuilds because people follow the "lifetime fluid" nonsense. He said that label is a marketing gimmick and told me he's got a stack of failed transmissions on his shelf that prove it. Hit me hard because I've been guilty of telling customers not to worry about transmission fluid changes on newer cars. I'm changing my tune now after hearing about the $4,000 bills those owners are facing. Has anyone else had a transmission guy set them straight on maintenance intervals?

2 comments

2 Comments

allen.amy18h ago

Did you end up asking him what interval he actually recommends? My guy told me the same thing and said 30,000 miles for traditional fluid and 50,000 for synthetic is the real safe zone. I started doing mine at 40,000 after that conversation and my last truck went 220,000 miles before I sold it.

murray.cole14h ago

Respectfully, @allen.amy, I gotta push back a little here. That 30,000 mile number sounds like old school thinking from when fluid was basically garbage. Modern synthetics can run way longer than that if the car isn't being beaten on. My 2014 F150 has 175,000 miles on the original transmission fluid and shifts smooth as butter. I change the filter every 60,000 and top it off but the fluid still looks clean. Different cars are built different too, a heavy work truck towing every day is totally different than a Civic that just goes to the store. That shop owner is probably seeing the worst cases because nobody brings a working transmission to his shop.