- Feb 21, 2023
- 6,444
- 15,511
Always interesting to see thoughts on reliability, upgrades, and performance of the different Duramax motors from the experts. I've owned the LlY, LML, and L5P. All of mine have been reliable.
Lost a water pump.on the LLY at 100k, sold it with 150k. I liked the LML the best with the tuning and 6 speed transmission and it's still going strong at 100k+. I did have DEF emissions issues with sensors and 9th injector.
Probably too early to say on the L5P, but its certainly the best off the lot performance for power, power delivery, and smooth shifting transmission. If the fake Allison holds up and the oil cooler doesn't leak into coolant system, it's probably a winner.
Lost a water pump.on the LLY at 100k, sold it with 150k. I liked the LML the best with the tuning and 6 speed transmission and it's still going strong at 100k+. I did have DEF emissions issues with sensors and 9th injector.
Probably too early to say on the L5P, but its certainly the best off the lot performance for power, power delivery, and smooth shifting transmission. If the fake Allison holds up and the oil cooler doesn't leak into coolant system, it's probably a winner.
