I am new to the site and my 1999 F-350 4x4 7.3 manual. I parked on a hill and noticed the truck would intermittenly roll an inch at a time while in first gear and shut off. The parking brake does need adjusting and/or replacing. I also found a re-call for the p-brake cable that i have an appt. for. What i am not sure of is that the clutch is slipping while parked and needing replaced or what it might be. Any help is very appreciated to avoid having ford dealer figure it out. Thanks

 

Does the clutch slip while driving? The truck will move slightly without the parking brake until the clutch holds the truck. Now if it rolled while in gear, that would be the clutch slipping.

 

No slipping while driving. It doesn't continuasly roll, it is about an inch at a time. I really get worried when loading and unloading the boat and see it move an inch at a time. It will stay still for a little while then start to move even.

 

Compression in the cylinders is what is holding your truck in place in a situation like this. Compression is slowly bleeding off allowing the motor to turn a little bit at regular intervals. I've seen this happen with vehicles parked on hills before.

Your parking brake is obviously not working, though. But it sounds like you're working on that.

 

More than likely it sounds like you have a crankshaft turning issue Than a clutch slipping issue a set of wheel chocks would be a good idea until you can get that brake replaced!
Jim & fat Monty

 

Out of curiosity......Why will most any manual transmission roll if engaged in higher gears then first.

 

Higher gears give the wheels more mechanical advantage over the engine. Lower gears give the engine more mechanical advantage over the wheels.

 

Is there something wrong with the motor or tranny allowing this to happen. I have had other trucks with manual tranny's that did not do this. They were half ton trucks with gas engines if that makes a difference.

 

Weight is a factor in the ability to overcome the engines compression, a super duty is not a little half ton the 2 ton behemoth syndrome is at work here!

 

Do i need to worry about a compression leak and do a compression test?

 

If the engine runs OK I wouldn't worry about it. I've seen a lot of vehicles do this, I don't think it's normally a problem.

 

Nope you're engine is just fine if there was a problem with the compression you would still be chasing it!
Jim & fat Monty

 

Thanks for the help and humor.

 

stick it in reverse next time and it will probably stay.

 

Or go back up hill......just kidding, couldn't resist...