RPM drop during consistent acceleration
#1
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RPM drop during consistent acceleration
Wondering if anyone else has experienced this and what the problem could be.
Under light to moderate and consistent acceleration I get a few hundred rpm drop when in 3rd gear. The tachometer will slowly climb like normal then drop a few hundred rpms and then slowly climb to its shift point and go to 4th. I am giving it consistent pressure on the accelerator and it only does it in 3rd gear, most easily noticed when accelerating up a hill.
Took it in once to dealer they did the 5-4 TSB which it needed and I was hoping that would fix it but did not. (I think they were hoping that would fix it as well)
This is on a 2015 subercap 5.0.
Under light to moderate and consistent acceleration I get a few hundred rpm drop when in 3rd gear. The tachometer will slowly climb like normal then drop a few hundred rpms and then slowly climb to its shift point and go to 4th. I am giving it consistent pressure on the accelerator and it only does it in 3rd gear, most easily noticed when accelerating up a hill.
Took it in once to dealer they did the 5-4 TSB which it needed and I was hoping that would fix it but did not. (I think they were hoping that would fix it as well)
This is on a 2015 subercap 5.0.
#2
Is it *actually* dropping RPM or is it just showing that it is doing so on the tach? Like, can you hear / feel the engine drop?
#3
Senior Member
Could it be the torque converter locking? It does lock in 3rd, before shifting to 4th, causing the rpm's to drop midway through 3rd gear.
I assume 2015's do this. Last gen did, and was normal, although odd if you're used to a 4 spd.
I assume 2015's do this. Last gen did, and was normal, although odd if you're used to a 4 spd.
#6
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Thanks everyone, appreciate it.
You would have thought the techs at the dealer could have figured that out and told me when I dropped it off with the same explanation.
You would have thought the techs at the dealer could have figured that out and told me when I dropped it off with the same explanation.