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holstein13's avatar
holstein13
Explorer
Jan 29, 2015

Transmission oil change 3 gallons low

I got a message on my Trip Tek system that simply said "oil" When I looked it up on the checklist, it read transmission oil so I figured this was the 5,000 mile oil and filter change that I had heard about.

I setup an appointment at 4 star freightliner in Tallahassee since I was going by there anyway.

When I got there, I described my transmission (Allison 4000 MH) and they recommended changing the oil and filter. Since that made sense to me, I agreed. They proceeded to change the oil and the filter and when they were done, I saw the kid (early 20's) trying to read the dipstick but having difficulties. He blamed it on the filler tube and I didn't think much about it.

Soon, they said they were finished and I was all set to go. Since it was getting late, I decided to camp out in their parking lot rather than driving to my next destination. As I was camped out, I looked at the invoice and noticed that they had only put in 6 gallons into the transmission. I thought that might be low, so I looked it up in my manual. Sure enough, the transmission holds over 10 gallons and a refill should take between 7.5 and 8.5 gallons. I decided I'd check the transmission myself in the morning before taking off.

This morning, I removed the dipstick and found no oil at all on the end of the dipstick. None, whatsoever. So I waited until they opened and asked the kid how much oil he put in. He replied, 5 gallons. (OK, so now there's two problems). I told him that the transmission takes 10 gallons. I went into the office to complain and they had two people go out and put 3.5 more gallons into the transmission.

I checked it myself again to verify that I had sufficient oil and took off after I validated the level.

Lessons learned:
  1. Check all the work done by mechanics and don't trust what they say
  2. Know what they are doing and what's involved
  3. Read the manual before you get service so that you at least know what's happening


The saddest part is that I didn't even need the oil to be changed in the first place. When I read the manual, it said to only change the filter at 5,000 miles and there is no need to replace the oil. That would have saved me a bundle had I realized that.

But I learned a few valuable lessons and know much more about my transmission now. So I'm pleased about that.