Grinding then starting

need a new clutch.

check the linkages from gear stick to gear box may be loose.

fix the clutch hydraulic system
check fluid level in reservoir
bleed the clutch system
fit a new clutch master cylinder

starter bendix gear could be bad,the clock not sure

There is something wrong with the clutch. Make sure that there is enough clutch fluid in it. For some reason the clutch isn't disengaging like it should, so you are grinding the gears in your transmission, making that awful noise. You want to get it looked at before you ruin your transmission by stripping the gears.

The 3rd Gear Synchro is worn or damaged, which is why it grinds when you try to upshift or downshift into 3rd gear. When it goes out completely you will have a very hard time shifting into 3rd gear, since the Synchro lines up the gears to make shifts smooth and easy.

Is it when the engine first starts? It sounds like to me that the starter is getting stuck in the fly wheel. what happens is when you go to start it, the solenoid push's the gear out and spins the gear almost one full action, the grinding noise could be the starter staying engaged after the motor has starter but quickly comes out of it after driving out of it. just a thought.

i had this same problem with mine and all i had to do to fix it was fill up the clutch fluid...i drove my turck like this for one year and the second i filled that up it worked like a dream. try it it might help.

Give a try by change your transmission/filters and Transfer case oil.

if this is a 5 speed manual transmission...all you need to do before putting your jeep into reverese is puting it into first gear and then shifting it to reverse to avoid any grinding or problems shifting into reverse...this isn't a problem just a poor jeep design by not installing an extra gear to eliminate this grinding or shifting problem