2010 jku sport manual transmission issue

F

FN Jeep

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Oct 22, 2022
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Nashport, Ohio
I have a 2010 JKU with 90k miles, I have lost 5th gear - only. No one wants to work on it in my area, just replace it with a remanufactured. Any ideas or suggestions greatly appreciated
 
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Running 35s, with a 3" lift for about 10yrs, other than that its stock, 6th gearis geared to high, not low enough to keep me moving, unless going down hill. It's been pretty solid, want to get it corrected. Looking to see if anyone else has had similar issues, if had to replace, any preference
 
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With the 2010, you only had 200HP to start with, and there are always a few ponies that escape as time and mileage accumulates. I run 35's on my '13 Rubicon, and 6th gear is just fine. But I'm making more power than you, and have 4.10 gears. Unless your '10 is a Rubicon, you've got 3.73 gears, which isn't exactly helping you any.

If 5th gear is gone, and you have driven it, there is a good chance there is damage to other gears as well. Opinions vary (as they do on most things) but I have never replaced a single gear. If a gear is broke, I replace the whole gearset. Because pieces of broken gear inside the case aren't good for the other gears and I dislike re-repairing things. It's not really a quick rebuild, which drives up the cost if you're paying someone to do it. Swapping in a remanufactured transmission will be quick and easy. You will pay more in parts, less in labor. I suspect the overall cost will be about the same.

Personally, I'd go with the swap, and at 90,000 miles I would also seriously consider replacing the clutch and pressure plate while it's apart.
 
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