North American Turbocoupe Organization



Transmission problems
bmxican Offline
Junior Member
#1
So i have a 87 tcoupe, t5, ect. Tranny has always been good, but recently its been shifting really hard, the clutch no engaging all the way, grinding ect. And last night, it started not even going into gear, id have to turn the car off, put it in first then start it and go.

I know for a fact there is no leak in the system, because the Hydraulic fluid level hasn't changed. But my question is, could this be the slave cylinder? That's what me and my dad think, but i'm just trying to get a second opinion.

Thanks,
Taylor
87 turbo coupe- Spec stage I, shortthrow, 3in exhaust DP back dumped out of a bullet, 15psi.
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Pete D Offline
Administrator
#2
It could be. Peel back the rubber on the rod end of the slave, see how much fluid is in the ribber boot. It it's just moist, that is normal. If there is enough that it would drip, the slave is leaking.

Might want to check the master cylinder also.

Have you checked the fluid level in the trans? Tried changing trans fluid?. That can sometimes make a big difference.
Pete Dunham


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Huey866 Offline
Posting Freak
#3
What your describing sounds like the clutch master cylinder. My thunderbird and my eclipse both developed this problem, sometimes you could pump the pedal a couple of times to get it to engage.

Im at the mindset with these cars that if you have to replace the slave or master cylinder, replace them both. Make sure the line is unclogged, and pressing the roll pins in and out is easier with everything out of the car.
87 TurboCoupe - silver, 137k, 5-speed, 3.73 w/ superior axles, Maximum Motorsports suspension, 03 Cobra Brakes, 93 GT vacuum assist, Griggs Subframe connectors, RR cam, Essy Adj. Cam Gear, Boblog, Bob Elbow, .63 T-3, ARP headstuds, Stinger 3in Exhaust, Magnaflow Muffler, AEM gauges, Tweecer RT, Godspeed Omega 18x9
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mickp Offline
Junior Member
#4
unless your clutch is new i'll bet that the clutch disc is worn out and needs to be replaced.

every time i have come acrossed this symtom the vehical was in need of a new clutch disc.

i have not had very many slaves and or masters go out without leaking fluid.
the master cyl. can have an internal leak but the slave will always leak when it go's bad.

my bet is on that tiny pinto sized clutch.
most parts stores that have replacement clutches for the t-bird are not even as strong as the original and they fry alot quicker.

they are just a generic replacement clutch that fits all cars and trucks that are n/a, but sell them as a replacement for the turbo cars.

those parts store kits will last anywhere from 10k miles to about 60k miles......notice the spread on the miles----.
it all depends on how you drive it..
me i would get about 10k out of a parts store kits.

my freind who never steps on the gas. his would last a good long time.

note: i have seen many slaves and master cyl. changed out when they were actualy still good.
then they change the disc and all is well.
just because of symtoms like yours.
1970 Mercury cougar XR7 convertable 2.3 turbocharged 5-speed conversion T3 A/R .48 header boport 1.5 ported head.
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mickp Offline
Junior Member
#5
unless your clutch is new i'll bet that the clutch disc is worn out and needs to be replaced.

every time i have come acrossed this symtom the vehical was in need of a new clutch disc.

i have not had very many slaves and or masters go out without leaking fluid.
the master cyl. can have an internal leak but the slave will always leak when it go's bad.

my bet is on that tiny pinto sized clutch.
most parts stores that have replacement clutches for the t-bird are not even as strong as the original and they fry alot quicker.

they are just a generic replacement clutch that fits all cars and trucks that are n/a, but sell them as a replacement for the turbo cars.

those parts store kits will last anywhere from 10k miles to about 60k miles......notice the spread on the miles----.
it all depends on how you drive it..
me i would get about 10k out of a parts store kits.

my freind who never steps on the gas. his would last a good long time.

note: i have seen many slaves and master cyl. changed out when they were actualy still good.
then they change the disc and all is well.
just because of symtoms like yours.
1970 Mercury cougar XR7 convertable 2.3 turbocharged 5-speed conversion T3 A/R .48 header boport 1.5 ported head.
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Paulie Offline
Banned
#6
Gentlemen over the years i have replaced more clutches than i would like to admit. But with that said My gut feeling is the slave may be bad but i dought it if it is free from leaks and is not air bound as Peter points out. The TC slave setup is fairly reliable. What i do is check the FORK throw distance. It should be at least 1 1/2"-1 3/4" Of throw at the fork. And have a hard feel all the way through its travel. Normally when the disc wears out it releases easier because the fingers back off. I am sure you have felt this with a worn disc. It's clearly noticeable when a slight push on the clutch pedal releases the clutch. If anything the Pressure plate probably has a cracked diaphragm. A cracked diaphragm will cause a hard release rather than a worn disc. But either way both should be replaced as a unit. I have found that summit sells a heavy duty clutch set for app 180 bucks and is fine for a stock or slightly modded engine. With that said good luck on your repairs and i would say the diaphragm clutch cover (preasure plate) is the culprit. Thank you

Note i have used many a clutch package from advanced auto (ZOOM ) with very good results on a stock engine and a person that drives conservatively
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bmxican Offline
Junior Member
#7
Thank you all. But me and my dad tore into it today and the clutch is fried, so we just ordered a new replacement clutch, Which once is here is being returned thanks to the advice of you guys and im going with a different clutch. We got a new pressure plate, trow out bearing, and clutch disk.

What clutch would yall suggest for about a 350hp combo that i plan on going with further down the road.

Thanks again,
taylor.
87 turbo coupe- Spec stage I, shortthrow, 3in exhaust DP back dumped out of a bullet, 15psi.
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Paulie Offline
Banned
#8
Sir you can use a RAM or a Center Force they are both good clutches. Thank You
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bmxican Offline
Junior Member
#9
Can i get a part # by chance? And how are the stinger clutches?
87 turbo coupe- Spec stage I, shortthrow, 3in exhaust DP back dumped out of a bullet, 15psi.
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Pete D Offline
Administrator
#10
Couple years old but probably still good:
http://natomessageboard.com/cgi-bin/ulti...162#000000
Pete Dunham


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