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test one , all autotmatic trans is it?
1: RPM rises fast but MPH does not as normal.
2: RPM does not rise fast , bad engine.
#1 is called a slipping trans mission or will not upshift or first gear is dead.
gears mater, to go faster than 10 the tranny must upshift.
this test is simple engine weak or tranny bad.
easy as pie to detect, ask a gear head friend for advice even hands on.
what matter most is RPM it hit doing that. 2000 , 3000 ,4000/?
If RPM goes really wild over 10mph that is bad transmission
and more tests ask
At a steady 65 mph, the torque converter clutch (TCC) is engaged. When you accelerate, the ECU disengages the TCC to gain extra torque for acceleration and then re-engages TCC when speed is steady. Its kind of like having an extra gear.
3500 is about normal for an xb at 65 mph. My previous ride was a pickup and rolled at about 2000-2500 on the highway. But the XB's engine is way more "tightly wound". Your rpm gage should run at about half of of your speed...ie: 70 mph will be about 35 (3500) rpm, 80 mph will be about 40 (4000) rpm. Freaked me out when I first got the thing, but after researching it Ive found out that with a stock engine it actually runs more efficient at the higher RPM's. The 06 boxes won't redline until 6000 rpm, so unless you are driving 120 on a frequent basis you're good. You can probably have it modified to run lower, but you will lose the awesome gas mileage and overall it is not going to improve the way it runs, and would have no benefit............
sounds like a skip if the light flashes. your vehicle goes into a limp mode if it detects a problem to prevent further damage. this is why you cant go over a certain speed of rpm
That is normal,If you do the same speed in 4th gear the rpm's will almost double.
The rpm's will repond faster in a manual than an automatic.
In a manual the engine supplies the power required directly to the gear that you have selected thus the engine rpm's will increase or decrease as needed.
one unit that operates ratio changes and is connected to the engine is that vacuum operated actuator on the transmission
it is possible that that unit is failing , vacuum hose is leaking and that will cause ratio changes as the vacuum varies
run the fault codes to check for wiring problems or VSS or TCM problems as well
pretty weird way of saying the trans slips or doesn't shift.
What is the location of the vacuum hose of the shift module?
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