Hello, I'm Chris.I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.
The clutch hydraulic sytem is only used to make the clutch freewheel or to press teh pressure plate. The synchronizers are steal and are only used to help going from one gear to the next to make the teeth line up. Your concern here if while in gear and reving the engine it slips. This means a new clutch disc and pressure plate are needed.
I don't think you are the right person to answer the question. electronic expertise and mechanical/hydraulic expertise are two different expertises seldon seen in the same person. Your answer is simplistic and doesn't even attempt to answer why this doesn't occur in the lower gears, why it only appears after long trips, and why the feel of the clutch is different after long trips. It is an answer which could have been supplied by any shade tree mechanic. I know no more than I did before I asked the question.
but I do know you're saying the clutch hydraulic system has nothing to do with the problem, and can be left as is. What would the symptoms be is the hydraulic system
were weak after gettin hot on a long trip?
Do you choose not to work with myself a Ford Lincoln Mercury master driveline tech. If so I can opt out and let another expert assist you.
Here are some of the other ford techs to choose from shown below .
My profile on Just Answer states I am a trans and transfer case specialist first. I do not know where it says I am an electronics expert, see below.
Regardless of the confusion. The gear range span is much shorter in the lower gears unlike the higher gears, that is why slippage is not noticed in lower gears. Even the ford clutch slip test is done in 4th gear, see below.
When the transmission is removed the slave cylinder and pressure plate and clutch disc and pilot bearing need to be replaced and the flywheel turned if hot spots are noticed.
You mentioned you already paid, you have posted a deposit, you have not paid for an answer concerning the clutch issue. If you choose to pay you must press accept to pay.
If you have any more questions on this matter please ask.
Okay, I will release the $18 to you and you can claim another satisfied customer, when in fact you could not have a more dissatisfied customer. In spite of a weeks worth of opportunity, you have communicated as little as possible, not a word of explanation of why slippage only occurs at the end of long trips, etc. the only thing I know that I didn't know when you took on the job is that Ford tests clutches in 4th gear. Compared to the questions asked that's next to nothing.You very cleverly covered your statement that hydraulic problems couldn't be at play when you said one must replace the hydraulic slave cylinder. Replacing the Clutch and slave cyclinder simultaneously means one can't tell which caused the problem. But what I did learn is never go on Ask an Expert expecting to get any more than a few slapdash cursory sentences passing for an explanation. Never again!
Most all techs replace the 60$ slave cylinder during a clutch job since it takes labor hours to remove a transmission just to replace the a leaking slave when you can do it all at once. This is why if you purchase a ford clutch kit it comes with all the clutch components including the slave.
I am by no means stating the slave is faulty, this is a preventative measure. Kind of like rebuilding an engine, you always install a new oil pump or rebuilding a transmission, you always install a new filter.
Long trips result in heat. If a clutch is slipping there is more heat. As a engine and transmission are ran they also build up heat. Heat makes metal swell and makes metal become more plyable which is effecting your pressure plate and its pressure applied to the clutch disc.
Dont leave mad, I want to make sure I answer all the questions you have on this concern. Sometimes I answer what I think you need to know but miss what you want to hear. I try not to beat around the bush and just tell you what to do rather than go into detail on what occured since in this occurance I felt the answer needed no explanation since a slipping clutch is a slipping clutch and the fix is to replace it rather than chase other possible causes.
I had taken note of the fact that most clutch kits were sold with slave cylinder, etc., and knew that both were going to be replaced in my vehicle. I just wanted to know what was the source of this system failure.
With respect to heat build up after a hundred miles but not 50 miles, Its clear the when two surfaces in contact with each other expand there is more pressure (friction) at the contact. Less pressure at the contact surfaces can occur from a reduction in pressure by whatever is applying the pressure (hydraulics), OR one of both of the surfaces becoming softer from the heat. I assume slippage occurs when pressure reduction from one of the two potential sources of pressure reduction is greater than the increase in pressure caused by the surfaces expanding. Still just don't see how one can assume that increased softness in the disk(s) is the cause of the friction reduction rather than reduced hydtraulic pressure. Hydraulics are also made weaker by heat, all else being equal.
I accepted your answer and you were paid on friday.
I did this in spite of having to re:ask the question a number of times to get you to address the questionI originally posed. The amount of time I had to spend to get a straight answer
was worth much more than the $18.
I paid for this on last friday. Please send me email address and i will send copy
of receipt from your for payment received.
You alreayd paid, there is no need to a receipt, I have to reply to all my customers with something or it shows I have waiters.