car in gear, clutch pressed...car lunges forward when cranking
#1
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
car in gear, clutch pressed...car lunges forward when cranking
new ACT, PP and lightweight flywheel...new throw out bearing and new pilot bearing and seal.
also new master cylinder....could it just be the master needs adjusted??
i really dont want to have to take it apart....
adjustment is in the attachment i was reffering to....
slave and master have been blead well with good clutch pedal pressure and fork seems to move a decent amount.
also, the (old) pilot bearing was only half way in the E-shaft so i placed mine in the same spot....
also new master cylinder....could it just be the master needs adjusted??
i really dont want to have to take it apart....
adjustment is in the attachment i was reffering to....
slave and master have been blead well with good clutch pedal pressure and fork seems to move a decent amount.
also, the (old) pilot bearing was only half way in the E-shaft so i placed mine in the same spot....
Last edited by 88rxn/a; 11-11-07 at 07:22 PM.
#4
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
i didnt realize it would show up so small!!
heres a link to the pic
https://www.rx7club.com/showpost.php...76&postcount=5
by the looks of your pic thats how far mine went in to...thanks
Sounds like you clutch isn't bled properly.
we bled it again and the slave moves the fork...i just hope it isnt moving it far enough to disengage the clutch. thats why i asked about the adjustment..if not i dont know what else it would be?
#6
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
bolts are nice and tight
we put the tranny on the motor when they were outside of the car. went together pretty easy i thought.
thanks for the tips though! ill try and bleed it some more and check the adjustment tommorow after work.
we put the tranny on the motor when they were outside of the car. went together pretty easy i thought.
thanks for the tips though! ill try and bleed it some more and check the adjustment tommorow after work.
Trending Topics
#8
Sounds like bad hydraulics to me. No leaks? IF you ned replacement parts look at www.nopi.com Last time I checked perts like these were innexpensive..
#9
Lives on the Forum
Does it do it with the trans in neutral???
BTW, that pic with the pilot bearing seal is not in enough.
Usually, you have about 1mm of space after the seal is installed.
The pic show the seal not far enough into the hole...
-Ted
BTW, that pic with the pilot bearing seal is not in enough.
Usually, you have about 1mm of space after the seal is installed.
The pic show the seal not far enough into the hole...
-Ted
#13
Eats, Sleeps, Dreams Rotary
I agree.. if you bled it right (meaning it doesn't just drop to the floor), and that's the only major change you made, it's probably the new PP...
which IIRC has like 2X the pressure on it.
You should get a stainless clutch line as well.
which IIRC has like 2X the pressure on it.
You should get a stainless clutch line as well.
#16
rx-for-my-7
iTrader: (1)
While the issue at hand isn't due to the pilot bearing, the op had mentioned something like, "also, the (old) pilot bearing was only half way in the E-shaft so i placed mine in the same spot" and I pictured the bearing sticking half way out of the e shaft so I posted that to illustrate.
But you are correct, Ted, the seal should be seated as shown in this pic of the old seal:
The pic of the new was taken right after it was roughed in, it was seated properly before the trans was mated again, thats why I take these pics to make sure it all goes back the way it was.
I actually had similar issue with my TII's slave and a new one seemed to do the trick for me. Good luck.
But you are correct, Ted, the seal should be seated as shown in this pic of the old seal:
The pic of the new was taken right after it was roughed in, it was seated properly before the trans was mated again, thats why I take these pics to make sure it all goes back the way it was.
I actually had similar issue with my TII's slave and a new one seemed to do the trick for me. Good luck.
#18
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
ok, i got my SS line from corksport today...i tried another slave (used again) and no luck.
so i guess i need to order a slave...
lets say worst case scenario....
what IF the slave doesnt resolve this??
is it possible i actually put the disc on backwards ??
**edit**
i bled the clutch according to corksports instructions,
using a vaccum line, i placed it on the bleeder into a clear canister. i then pumped the clutch, bled, pumped, bled until there wasnt any air bubbles....
so i guess i need to order a slave...
lets say worst case scenario....
what IF the slave doesnt resolve this??
is it possible i actually put the disc on backwards ??
**edit**
i bled the clutch according to corksports instructions,
using a vaccum line, i placed it on the bleeder into a clear canister. i then pumped the clutch, bled, pumped, bled until there wasnt any air bubbles....
Last edited by 88rxn/a; 11-16-07 at 09:58 PM.
#20
Lives on the Forum
iTrader: (8)
How much TRAVEL are you getting out of the slave cyl/fork? IF it is moving the amount specified in the manual, usually more than 1/2", then it is doing its job. You can also hold the pedal and have someone observe it to see whether or not it is losing pressure after a couple of seconds.
You could have a broken fork or pivot ball.
IS this by any chance an SR Motorsports flywheel? NA or turbo?
I always install the pilot bearing into the shaft with the seal right in front of it, and so that the edge of the seal is at the end of the hole in the shaft. IF I am not using a seal, I still put the bearing in the same place that I would if I were using a seal, about 3/16" back into the shaft.
Did you clean and lube the input shaft of the transmission? A disc that is sticking on the input shaft splines can cause this exact problem. I always like to test fit mine prior to assembly.
It'd be pretty damn hard to install a disc backwards, and it would be pretty obvious. I doubt that is the case.
You could have a broken fork or pivot ball.
IS this by any chance an SR Motorsports flywheel? NA or turbo?
I always install the pilot bearing into the shaft with the seal right in front of it, and so that the edge of the seal is at the end of the hole in the shaft. IF I am not using a seal, I still put the bearing in the same place that I would if I were using a seal, about 3/16" back into the shaft.
Did you clean and lube the input shaft of the transmission? A disc that is sticking on the input shaft splines can cause this exact problem. I always like to test fit mine prior to assembly.
It'd be pretty damn hard to install a disc backwards, and it would be pretty obvious. I doubt that is the case.
#21
Lives on the Forum
#22
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
its a ACT extreme lite flywheel w/ ACT HD clutch +PP .....
ill double check the length of movement and see if it bleeds off......
i hope i didnt put the clutch in wrong or the fork isnt messed up or any of that. i really dont want to pull the tranny.....
thanks for the input, ill check those out and un the meantime im gonna call around for a slave here.
ill double check the length of movement and see if it bleeds off......
i hope i didnt put the clutch in wrong or the fork isnt messed up or any of that. i really dont want to pull the tranny.....
thanks for the input, ill check those out and un the meantime im gonna call around for a slave here.
#23
gross polluter
iTrader: (2)
Dont buy a new slave yet. If you can pump up the clutch and then lose pressure there are 3 possibilities besides needing to be blead. First is leakage through the slave, and this will be obvious because you will have brake fluid leaking out into the bell housing. Second is the clutch line which will also be obvious. If the problem is pressure leaking through the master you will either get leakage through to the interior of your car or there will be no leakage as it will just go back into the reservoir.
If there is never any pressure loss and it just plain doesnt work, then look at fork, pressure plate, etc.
If there is never any pressure loss and it just plain doesnt work, then look at fork, pressure plate, etc.
#24
Have RX-7, will restore
iTrader: (91)
i had the same problem. the result was a bad pilot bearing. the trans would not go into gear with teh engine running and the clutch depressed. if you were to start the engine with the trans in gear and the clutch depressed, the car would lurch forward. the metal race around the bearings in the pilot bearing was just slightly dented and once in the eccentric shaft the bearings would not move. if the bearing were removed, you could spin the bearings with your finger. i replaced the pilot bearing and regreased it and all is fine!
#25
tom port.. AKA streetport
Thread Starter
iTrader: (6)
Join Date: Jan 2005
Location: ludlow, pa
Posts: 4,659
Likes: 0
Received 0 Likes
on
0 Posts
thats what i was afraid of....
im starting tho think mine needs taken out and inspected (tranny)...
tommorow morning im going to inspect the movement of the fork and slave to see if it moves far enough and maybe ust maybe i can get away with adjusting the clutch...i dought it is gonna be the issue though.
im starting tho think mine needs taken out and inspected (tranny)...
tommorow morning im going to inspect the movement of the fork and slave to see if it moves far enough and maybe ust maybe i can get away with adjusting the clutch...i dought it is gonna be the issue though.