I installed a new clutch kit in my truck.I didn't

So you installed a new transmission and a whole new clutch kit? Did the kit include the pressure plate, clutch, throw out bearing and slave cylinder? Did you bleed the slave cylinder? The low and soft pedal is a clear sign that there is air in the hydraulic system. The loud noise after that tells me you're either grinding the gear trying to shift or there is a problem inside the transmission itself. If you installed everything correctly and torqued all the bolts correctly in the clutch assembly and transmission, then try bleeding the slave cylinder again, sometimes air gets trapped in the cylinder and it's hard to get out, If you let the clutch master cylinder run dry while you either had the clutch apart or while you were bleeding the clutch, then you have to start from scratch and re-bleed the whole system.

Jamie, are you losing any fluid from the clutch master cylinder? By small resistance I presume you mean the pedal feels soft?

If you're losing fluid from the master cylinder you have an obvious leak somewhere and air is getting into the system.

Most leaks occur from the clutch SLAVE cylinder as it does all the work .. If there's no leak from the clutch slave cylinder, suspect the seals inside. It's like a bicycle pump ..the seal inside wears and it won't pump..

You may be able to get an overhaul kit. I'm in the UK .. but here's an Ebay link for a slave cylinder overhaul kit just to show you what it looks like:
FORD CORTINA MK2 CLUTCH SLAVE CYLINDER REPAIR KIT SP2085
Here's a link to show you what the slave cylinder itself may look like (it may NOT be for your vehicle..)
CLUTCH SLAVE CYLINDER FORD FIESTA ESCORT
It's easier and quicker to fit a new slave cylinder than it is to strip down and replace seals with a kit. Be aware, after overhauling or replacing a slave cylinder you have to bleed it - remove the air.

The easiest way of doing this is to make sure the reservoir is fill of fluid, crawl underneath the car with a spanner/wrench, place a rag over the bleed point and get somebody to pump the pedal a couple of times while you undo then tighten the bleed nut.

If it's not the slave cylinder at fault- then it's the master cylinder. Master cylinders also have a 'piston' and rubber seals which wear/perish.
However, it's more than likely that it's the slave cylinder at fault

Get it online
Doesn't cost much
Lots of places have it
You not going to rebuild a part like that
there too cheap new

replace the clutch master cylinder. The rubbers on the piston swell over time and/ or break down blocking up the ports in the cylinder.. Wrong fluid is the main culprit for this type of fault.

Instructions

1. Remove the Old Clutch
   • 1Remove the exterior parts (those that are not in the engine compartment) to include the floor shifter inside the cab of your F-150 and the exhaust pipe
     
   • 2Remove interior parts--those parts that are under the hood. This includes the starter, which is attached to the transmission bell-housing. Disconnect the drive-shaft of your F-150 and the hose for your truck's hydraulic slave cylinder.
     
   • 
     
   • 3Remove the transmission from your F-150. Using a metric socket set, undo the transmission cross-member and bolts, which will allow you to remove the transmission from the truck. You should have plenty of room to work underneath your F-150, as these are tall trucks. In some cases, especially if your truck is lowered, consider using a lift or a jack to raise your truck off the ground for easy access to all components.
     
   • 4Remove the pressure plate and the worn clutch disk from the transmission.
     
   • 5Inspect the flywheel. If the clutch flywheel shows significant amounts of wear or is damaged in any way, you should replace it. Reusing a damaged flywheel can cause your new clutch to fail.
     
   Install the New Clutch
   • 6Install your new clutch disk and pressure plate. You'll need to use the clutch alignment tool, which should come as part of your clutch kit. If your clutch kit doesn't include this tool, you can buy it at an auto parts store or any Ford dealership.
     
   • 7Replace the transmission back into your F-150. Remember to reconnect the transmission cross-member and all bolts.
     
   • 8Reconnect all interior parts--including the starter, drive-shaft and the hose for the hydraulic slave cylinder. Don't forget to bleed the slave cylinder when you attach the hose.
     
   • 9Reconnect the exterior parts, which includes the exhaust pipe and the gearshift inside the cab.
     
   • 10Drive your F-150 slowly in a controlled environment. This will ensure that the new clutch is installed properly and is in good working condition
     

Find out if this is a hydraulic clutch. Being a 2005, it most likely is and sounds like your slave cylinder went out. I'm not sure where this is on your car, however it is usually mounted on the driver side firewall below the brake mastercylinder (brake fluid resevoir).
If it is not located here (call an auto parts dealer for location, and a repair manual) then you may have an internal slave cylinder which is located in the transmission with the throwout bearing. You will need to pull the passenger side drive axle, seperate the transmission from the engine (if front wheel drive) to replace.
Inquire with your local auto parts dealer or dealership for further details and repair options, and if this is actually the issue. If it's internal, look for a puddle directly below the engine. If the slave cylinder went out, then you'll have a puddle under the engine.
Also, if the slave cylinder (if hydraulic) is mounted to the firewall, either it is bad and needs replaced; needs to be bled (like brakes) or you may not have put the throwout bearing on correctly and it came loose.
Again, inquire with the dealership or an auto parts dealer for details (or a certified mechanic for repairs).
Please let me know if you need further assistance.
carsandcomps

Welcome to Fixya

You didn't mention in your question what you want to do with the clutch slave cylinder. Anyway, if you want to replace it, please see procedure below:

Since it is a pressurized system, remember to bleed out the fluid before completing the job so that you remove any dangerous air pockets in the lines. Remove the connector to the clutch, the tube that runs hydraulic fluid from the master cylinder, and the two bolts connecting the cylinder to the bell housing. Take the new slave cylinder, fill it accordingly with fluid, re-attach it, run the fluid through the system, and test the resulting pressure.

Thank you for using Fixya!

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the only way that the seal pops is when the piston comes out the end of the cylinder that indicates that the installation of the clutch kit is incorrect and the throw out arm is not in the throw out bearing carrier properly
regardless of makes , if the clutch kit is made for that vehicle it will fit

problem may be the thickness of your clutch disc and preasure plate faces

I don't have that shop manual, but the slave cylinder looks like a small brake master cylinder and is on the firewall on the driver side.
Check to make sure floor pan is not split by slave cylinder. Some had weak floors that needed reinforcing. Ford had a kit.

Otherwise, replace slave cylinder. tascafordparts.com sells at discount.

Please rate as fixya if this solves your problem.
Report back and good luck