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Transmission jumping gears on highway.
My transmission is acting annoying.
1. In fourth, at highway speed (45-60 mph) it will jump from 4 to 3 for a second, then back to 4, hold that for a while (seconds, minutes, it varies), and do it again.
2. It also seems slow to lock the torque converter in 4th; it's revving maybe 1-200 RPM high at 60. When it's at the normal revs at 60 it stays there solidly without shifting.
3. About half the time I get a hard 1-2 upshift.
I've searched around and found a bunch of possible causes and solutions. Bad TPS, bad tranny resistor, brake band needs adjustment, transmission not reaching normal operating temperature, torqu converter gone gimpy, general tranny apocalypse...
I'm leaning toward bad TPS, because I also have an annoying hesitation from 1200-1600RPM, very much like there's a dead zone in the throttle. I'd like to know peoples thoughts on what else it could be though.
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Chris
92 Ebony Mica LS-L " A Rolling Restoration": 223,250 KM - Sleeping
2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos
2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold
2020 Ram 1500 Longhorn - Red Pearl
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