Long time lurker. I own a 2014 Chevrolet Cruze Diesel north of border. I've noticed the car a little sluggish in the past month. Last week, I had a roadside issue where the car wouldn't shift gears (high revving). I got it towed home.
Looked under the vehicle and noticed on the plastic cover there was a lot of transmission fluid that was leaking. I'm guessing the cover was catching the fluid so I didn't notice on the driveway. Also checked the engine light and got P0732: Gear 2 Incorrect Ratio.
I did the transmission fluid change, and only 1QT came out, so it seems to have been leaking for some time. Despite the fluid change the car still had issues going in and coming out of second gear. Took the car to the dealer.
The car has 103k km (64k miles) and is 4 years old. Was told the leak would be covered, and was coming from the axle seal. However, the service tech advised me they spoke to the warranty department and before they can consider it an internal transmission issue they need to replace the Transmission Control Module which is not covered under the 5 year warranty and costs $1500 (~$1100 USD). The service tech then advised if the TCM does not fix the issue then it can be considered an internal transmission issue and will be replaced under warranty. I was told if it comes to this I would still be out the cost to replace the TCM.
Does this sound correct? I have no experience dealing with manufacturer warranties this is the first new car I've owned. I have no problem paying for the TCM if that actually is the issue, but I feel if it doesn't fix the issue it should be reimbursed/covered under the transmission warranty as the replacement was done despite not being the issue.
Would this likely resolve the issue? Would the leaking fluid have damaged the TCM? or could the leaking fluid be a sign of obvious internal transmission issues?
TLDR: Car is laggy, not shifting properly, GM states TCM has to be replaced out of pocket before they can consider it an internal transmission issue and replace under warranty