mhuppertz

Is it possible to bend a shift fork? There is a ton of play in mine and it has a very short engagement, so I am having trouble with disengagement.
Either that or the pivot point is 2 inches too short, or maybe the pivot wore through the fork?
Anyone had experience with something like this?

death row dave

What trans and which gear ? It is possible to bend shift forks , more common is nylon pads worn out .

mhuppertz

Nv4500, all gears.

thrashingcows

I have not come across anyone mentioning a NV4500 shift fork bending before....not to say it could not happen. Could it be something bad in the hyd clutch system maybe? Maybe pop off the lower slave cylinder and use a light and mirror to check out inside the bell housing.

That is the one crummy thing about the NV4500 there is no way to just pop a cover and inspect what is happening with the clutch/fork, TO bearing etc.

mknittle

Shift fork or clutch fork?

cabtruck

death row dave

Don’t think it’s possible . It’s pretty tuff stuff in a 4500 . Many simple things cause shifting issues : incorrect fluid , top detects worn or broken springs , nylon pads on shift forks missing or worn . Issues in all gears , clutch issues , as mentioned I also think Hydraulic release issue or worn pilot bearing .

sooty

is it possible to remove slave and view fork with a mirror, 4500 has 2 bellhousing options, stock 2nd gen and conversion advance adapters to 1st gen, ive had hydraulic issues with two masters failing with reduced travel/activity

death row dave

You can see a small part of it . Is your’s in OEM setup or aftermarket ? After thinking about your issues . I would first check the pedal pin and MC pushrod for a wear issue . This is a common place for wear that will limit the amount the movement of the MC , which will greatly effect the amount the slave disengages the clutch . I had to make a new pin and pushrod for the MC on my truck . I made the push adjustable , so you can dail in the needed amount of movement also . It has been shown a few times on this forum , do a search if in question of pedal workings

mhuppertz

It is a Standard Transmission and Gear setup. I bought it a long time ago so I cant remember the details but it looks like a getrag fork. I am on my 4th hydraulic clutch set, had to repair the firewall and build a bracket for under the dash, that isn't the issue.

death row dave

Call TV Tommy Ivo, sounds like he has had an issue like this before . I’m lost for an answer now .

mhuppertz

Got under there with a flashlight and a helper, as soon as the clutch pedal is touched it begins to move the fork and throw out bearing. The crank does not move and the pivot is tight. So either something is wrong with the pressure plate or the pilot shaft bushing is galling?

mhuppertz

Does this look normal?

death row dave

Looks normal to me , never looked at Getrag . I do notice two notches worn in the bellhousing from the fork operation . I suspect fork is bent not allow clutch to release . I have an OEM new unused fork for NV 4500 . I don’t know if they are same part or not .

sooty

did you measure how far the push rod moves? ill measure mine for comparison.