13 spd problems

Problem #1: When up shifting, anytime you are going to select direct in your shift, engage the stick in the next gear, then select direct on the splitter and bring the throttle up at the same time. This will smoothly complete your shift and no grinding.

Problem #2: The purpose of the clutch brake is to stop the trans to enter a gear. By standing on the clutch pedal while the engine/trans is trying to operate, you are adding additional load by being on the clutch brake. When operating in gear such as to unload, the clutch pedal should be one or more inches off the floor to avoid getting onto the clutch brake. Your clutch will still fully release one or two inches off the floor when properly adjusted. Which brings me to the truck moving forward with the clutch released: It sounds as if the clutch is not fully releasing when cold and after you warm it up operates correctly. To correct this will require either a proper clutch adjustment or the replacement of the clutch.

 

OK, now I see the whole picture. The clutch center plate is hanging up and trapping the forward clutch disc which in turn rapidly heats the disc and causes the truck to pull harder and harder from expansion of the disc from the heat. The center plate needs to float freely for proper clutch release.
You will need a new clutch soon.

 

While it does seem your clutch is probably on the way out--the clutch brake (as in many cases)does seem to be the issue at hand--bendix does make a swivel type clutch brake replacement that can be easily installed--w/out tearing everything out--it isn't a long term solution but can/will buy you a good deal of time b4 you have to replace that clutch. Good Luck

 

Your welcome--wish I had better news--trouble with clutches is there really isn't anyway to be sure what is going on--without opening it up and really checking--and that is the double edge sword! The biggest cost9and most of it)in clutch replacement is the LABOR--most clutch packs arent teriibly expensive(relatively)but and each truck mfg is different--there is quite a bit of time involved getting to it--and at that point it makes no sense not to just replace it--that is why the riviting clutch brake replacement is so nice--it can be installed in a short amount of time!
And remember this type of job can vary by as much as $2K depending on who does it--I have heard of folks payin upwards of $5k for it--and frankly can be done for well under $2K--so if you do not have a shop you use regulalry that take care of your equip--that u trust--SHOP AROUND!
Good Luck

 

holy crapper they charge me $450 to drop and reinstallk trans in my area plus the cost of the new clutch.

 

Moving this to the Garage section.

 

While the gearbox is out it is a pretty good idea to do the rear main seal as well, costs a lot less do to it while it is all apart