My car has a knocking noise in the lower gears when going up a hill

what engine do you have?

I think ( if it is a manual gearbox) your clutch has gone OR ( if it is an automatic ) the connecting plate between flywheel and gearbox is broken...

-No matter what type car. When it get older it's always has
this problem.
-Every thing worn out. (Too much clearance)


Mai Lor

The knock sensor code does not always mean the sensor is faulty.
The sensor picks up noise and vibration in the engine such as a spark knock would generate, and the computer slows down the spark timing to fix it. If the noise or vibration continues, the code is set.
Could be a noisy valve, or a problem with the crankshaft or other component.

I do think that loose key and keyway could cause the knock. It would also explain the loss of power, due to the engine timing not being spot on.
A knocking big end or main bearing would not improve at higher revs, it would get worse.

Act soon before the keyway in the crankshaft itself is too badly damaged, by removing the crankshaft pulley, lower timing belt cover, and belt guide. You can then get a precise idea of what exactly is worn. This may assist

http://www.turboninjas.com/camry/eg1.pdf

You may actually have to find an oversize key, for a neat fit in the crankshaft. It may be necessary to file or grind it to fit. Engineering supply houses stock them, eg

http://engtooling.com/webshop2/

Depending on year, make and engine , you may want to retire this car. Lower end noise is the rods/ main bearings. 20 mph is low compression, which is rings or valves. This would be a rebuild or replace the engine with a used one.

well, without hearing the noise myself, i could guess that the torque converter clutch might be going bad. the torque converter is the part that transfers the power from the engine to the transmission via viscous fluid motion, the converter also has a clutch that internally provides a direct connection inside the converter for better fuel economy. but as with anything labeled as a clutch, it wears down to a point where is slips. the noise your hear could be the torque converter clutch slipping. i owned a 90 astro van with the same drivetrain that made a noise similar to what you speak of up hills. while driving up hills, fully depress the accelerator and if the clunking noise occurs, then the whine goes away as you accelerate faster in a lower gear, very likely this is the case. you would have to have a transmission shop diagnose further. i drove that old van for five more years cause i didn't want to pay to have transmission repaired. it can be very expensive.

A knock sensor going is usually indicated by pinging/rattling noise from engine especially when accelerating up a hill or just giving throttle but not kicking down a gear. Not sure what your asking about transmission?

check out the knock sensor it may be the problem