Engine revs go high when changing gears but loss of power on MAGN

Have the gearbox...transmission checked. Power loss? have oil level checked also.

do they revs drop off when taking pressure off accelerator pedal when out of gear? if only staying high during gear change it would suggest a worn clutch friction/pressure plate so the engine isn't slowing down when clutch is depressed .I'd also have the OBD codes read to see if there is a sensor/switch at fault , but sounds like the clutch to me

First thing to try would be different fuel. Use a fuel stabilizer and fill with good gas. see if that helps. Also, check the fuel pressure.

This is a problem that is caused by internal pressure loss, that in most cases is due to the internal seals being hard from age and heat. This transmission will need to be overhauled.

possible fuel filter--egr valve-cat conv-these usually dont cause a check engine light but cause problems at higher revs

The forester diesel 6spd gear box is designed to replace the high low gear box so although starting off in second or third gear is possible .... puts a lot of strain on compents ie clutch/ gear box . very slow manuovering is much better carried out in 1st gear , as is moving from stationary . The engine torque is low dow the rev range high max idle is reached very quickly . The diesel engine characteristics are different to the petrol version ( I own 2.5 forester 2009 - 7.8l per km's @55000 km's). So you need to change your driving style to suit . I have test driven the 2.0l Diesel and sufficiently impressed to replace the 2009 version with the diesel .

i think you need a new mechanic, i got that problem twice, each time the transmission had to be changed because the 1st gear was shot. i eventually changed to a 5fwd gear-box which increased performance like you would never imagine.

This is a very common problem for ford. I have the same thing every day. It is the computer not reading the temp. When it does that just tap the gas pedal.

The grinding sound may be a throw out bearing or the pilot bearing. The sticking throttle problem sounds like a linkage or cable binding up from possibly damage due to the impact from the accident.

my friend has same model its normal he said it does it more so when its cold