|
Junior Member
|
|
Join Date: Dec 2009
Location: The Grid
Posts: 22
|
|
Junior Member
Join Date: Dec 2009
Location: The Grid
Posts: 22
|
Lower than normal engine RPMs at speed
Hey everyone. I've got a 2007 4Runner V8 with just under 160,000 miles on the clock, original transmission, basically factory everything as far as drivetrain components (99% sure). My issue is that today my tach has started reporting lower than normal RPMs for various speeds as well as the shift points.
For example: normal behavior for driving 75MPH would be ~2250-2300 RPM, but now it's about 2050. Additionally, when accelerating at normal pace, gears would shift around ~2100-2300 RPM but now they're shifting at 1900. But the engine pitch sounds the same (at least to my ears and I generally pay pretty close attention to this since I love the sound after installing a cold-air intake 7 years ago) at all times, including the shift points.
This issue happened earlier this year however my battery was due for replacement and while I'm not 100% sure it went away before replacing it, I can confirm that until today it hasn't happened since.
Today it was fairly cold (17F when I drove into work) but my car is garaged and it's roughly 60F in there. Is it possible the cold temperature could have this much of an effect and that quickly? If not, am I looking at a transmission/torque converter issue? I'm all ears.
|