My clutch sqeaks no matter the temperature cold or hot and I have no idea why. Thinking it could be be the bushings or something else not sure. And when I start my truck my oil temp spikes real high than slowly drops down to regular running temp but sometimes driving comes back up and back down, without me pinning the pedal or anything just wondering what the problem was any comments would be helpful.

2001 5.9 turbo diesal 6-speed.

 

probably a bad oil temp sensor or a open wire leading to the sensor...

oil temp should stay very close to coolant temps. however I don't recall there being an oil temp gauge on these trucks...just an oil pressure gauge unless you have a monitor plugged into the OBD-II port or the canbus datalink cable under the hood...

clutch squeak can either be a worn out clutch, or throwout bearing might need some lithium grease on it.

 

I meant pressure haha sorry.