Allright guys maybe you can help me,

Usually I am in 87-96, but I will ask here too, for your most expert and valuable opinions.

I have a 94 m50d mated to the I6 with light 2.73 rear end gears. She is a great truck, and clutch feels and works good. 129,000miles. Anyways, just put in new plugs with RTV and the inside looks great!

That is the good news, although you can't tell where a clutch is at with the slave cyinder. Every now and then, sometimes in 2nd and mostly in 3rd, I have a delay in power. I put it in gear, let off clutch, revs go up as accelerator is pressed but no power, then after a bit revs go down and power and acceleration happen. This happens infrequently and more when I running around town than on the highway.

Is this a pressure plate or throwout bearing issue? Do you think it is just sticking at times?

 

Sounds like your clutch/pressure plate assembly is worn out and is slipping when you let the clutch pedal out.
How many miles on the current clutch?

 

I don't know how many miles are on the clutch. I bought the truck just recently. The previous owner says the clutch was done a couple of years ago. There is only 1288xx on the clock so I know it was driven much in those years and from the carfax report I gather about 35,000 miles if his figure of 5 years was correct. It was only a work truck and hardly used. It sat 6months before I came by it. (He is still compiling and will send me the repair records.)

This leads me to believe miles aren't correct if clutch is failing. (he told me once there was a blown circuit for the odometer/speedometer) (the radio was blowing it for some time, but it was fixed when I came by it, radio disconnected) I rewired in a new radio but I would think the truck would still record miles with a blown circuit? I would think the fuse in the panel would be for display. If not the truck could have more miles on it than it says which would equal more on the clutch.

Otherwise, its 40K.

The weird thing it happens infrequently, I would think if it were failing it would happen all the time?? Like when I down shift it doesn't, and it will happen once or twice in the course of over 15 times going in that gear (town driving). Could I be releasing the clutch too early and causing this?

 

Could be an issue with the hydraulic clutch system, the first real cold day last winter I got in my bronco and pushed in the cluch and the pedal didn't come back up for a wile, I let it warm up but it was still real slow just gave it gas and let the cluch engauge on its own. Changed the fluid and no trouble since musta had some water in it or something. I would check this first as it would be the the cheapest and fastest thing the check. just my $.02
-Johnboy

 

Agree with the above.
Based on what you say, it sounds a little more like it could be the hydraulics slow to respond.

Don't you have to pull the transmission to access the slave cylinder and bleed screw? Can't remember for sure.

You might try siphoning out as much old fluid as you can, then fill with fresh.
Then, and not sure if it will work, but it's something we do on motorcycle brakes:
Pump the clutch pedal a number of times (about 4,000 times - just kidding )
Then push the pedal to the floor and use a stick or something to wedge in to keep it there overnight.
If you get lucky, any air in the system will sometimes migrate up and out when left overnight.
Not as good as a complete system flush, but quick, easy and sometimes cures the problem.
If it's water, then you are stuck needing to flush.

 

Thanks guys,

You are awesome. I drove it alot the last few days, (had to work, that is why no replying) Hardly did it at all. In all of my driving had it happen about twice on Fri, and non on Sat. I think it also has something to do with hydralics. I will check the fluid level and decide what I want to do. It doesn't happen enough that I am that concerned.

I am scared to do a siphon and refill, do I siphon out of the reservoir? How do I know if there is enough fluid in it when I refill?, my thinking is the level won't show until you start it, and if it has low fluid will it start alright, ie clutch engage?

I will see how it goes, seems like it only has been doing it everynow and then, and somehow I think it is only on driving it after it has sat for awhile, so it might be the cold. There has been frost for a bit now. I also think if I spend more time letting the clutch engage when the truck is colder on 3rd I avoid this.

Thanks for your suggestions, I am sure I will ask for more info if I decide to siphon it!

 

The clutch fluid resivoir is pretty small. You could probably just use a syringe to remove most of the fluid, and then turn right around and fill it back up with fresh poured straight from the bottle.

You would not risk anything really as long as you don't work the clutch without the resivoir full.

There is a mark to let you know how much is "full"

 

You can just bleed the old fluid out the bleeder is easily accessed without pulling the tranny just sticks out of the bellhousing just above where the pressure line goes in.
-Johnboy

 

Thanks for the info.
I could not remember if you could access it without pulling the transmission.