R52 Shifting Problem
Created by: raycanales
Found 24 Messages
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Quote:
Originally Posted by Dan Moffet
That looks a lot like rust on the splines. Assuming that is the end of the transmission input shaft and that the clutch plate is supposed to slide freely on those splines, I'd suspect your clutch plate isn't sliding and remaining in contact with the flywheel, which would keep the transmission spinning in neutral. I had a similar problem with a vehicle where the the spline tolerance was a bit tight - it would drag when cold but would be fine in warmer weather.
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That looks a lot like rust on the splines. Assuming that is the end of the transmission input shaft and that the clutch plate is supposed to slide freely on those splines, I'd suspect your clutch plate isn't sliding and remaining in contact with the flywheel, which would keep the transmission spinning in neutral. I had a similar problem with a vehicle where the the spline tolerance was a bit tight - it would drag when cold but would be fine in warmer weather.
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"Hang on a minute lads....I've got a great idea."
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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How did the flywheel look?
If the clutch is acting like it is partially engaged even with the foot off the clutch pedal - there must be something wrong with the installation. You might try unbolting the clutch slave from the housing to see if anything changes. If not, then there has to be a mechanical defect inside.
Just trying to guess what might cause this, I thought of the 1st gear synchro... or maybe the flywheel failed and the dual mass plate may have separated changing the thickness of the flywheel? These are pure speculations trying to find something to explain the symptoms....
If the clutch is acting like it is partially engaged even with the foot off the clutch pedal - there must be something wrong with the installation. You might try unbolting the clutch slave from the housing to see if anything changes. If not, then there has to be a mechanical defect inside.
Just trying to guess what might cause this, I thought of the 1st gear synchro... or maybe the flywheel failed and the dual mass plate may have separated changing the thickness of the flywheel? These are pure speculations trying to find something to explain the symptoms....
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Quote:
Originally Posted by kenatminimania
Quote:
Originally Posted by raycanales
Quote:
here is what the fork looks like what your thoughts?
I am gonna order the fork throwout bearing the clutch looks like it has plenty of life on it and the flywheel looks perfect
Can't see the photo of the shift fork....
Ok replaced Pressure plate clutch guide sleeve put new oil in transmission
bled the clutch
then the fun started
it is slipping the clutch without pushing the pedal getting the pressure plate hot like something is locking up inside the transmission
but if we start it in gear it works just fine just like before
it is only when we start it in neutral
essentially same as before but she runs fine thru the gears from a dead start now we are really baffled any ideas?
essentially same as before but she runs fine thru the gears from a dead start now we are really baffled any ideas?
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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Quote:
Originally Posted by raycanales
Quote:
here is what the fork looks like what your thoughts?
I am gonna order the fork throwout bearing the clutch looks like it has plenty of life on it and the flywheel looks perfect
Can't see the photo of the shift fork....
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Quote:
Originally Posted by kenatminimania
Quote:
short of changing it for another transmission
how much effect could the wrong fluid in the transmission have ?
and we are dropping it tomorrow gonna look inside see if the clutch release fork or the throw out bearing are the cause or anything else in there
I spoke to a Mini Tech at Mini USA he said to read some articles he sent me
honestly we are stumped on this one its time to start taking S*** apart
how much effect could the wrong fluid in the transmission have ?
and we are dropping it tomorrow gonna look inside see if the clutch release fork or the throw out bearing are the cause or anything else in there
I spoke to a Mini Tech at Mini USA he said to read some articles he sent me
honestly we are stumped on this one its time to start taking S*** apart
Curious to know what you find when you drop the transmission....
finally got around to looking at the transmission and the throwout bearing was in 3 pieces when we took it off
here is what the fork looks like what your thoughts?
I am gonna order the fork throwout bearing the clutch looks like it has plenty of life on it and the flywheel looks perfect
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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Quote:
short of changing it for another transmission
how much effect could the wrong fluid in the transmission have ?
and we are dropping it tomorrow gonna look inside see if the clutch release fork or the throw out bearing are the cause or anything else in there
I spoke to a Mini Tech at Mini USA he said to read some articles he sent me
honestly we are stumped on this one its time to start taking S*** apart
how much effect could the wrong fluid in the transmission have ?
and we are dropping it tomorrow gonna look inside see if the clutch release fork or the throw out bearing are the cause or anything else in there
I spoke to a Mini Tech at Mini USA he said to read some articles he sent me
honestly we are stumped on this one its time to start taking S*** apart
Curious to know what you find when you drop the transmission....
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Quote:
Originally Posted by kenatminimania
Quote:
Originally Posted by raycanales
Quote:
Originally Posted by kenatminimania
How many miles on the clutch?
last night we did the stick trick
where you put a stick overnight pushing the clutch to the floor see if that makes any difference
according to Pelican Parts Tech that is one step that is in their instructions and see if that works.
Im at wits end here
If the clutch hydraulic lines and the clutch master and slave have all been checked out, not sure where else to look.
It 'may be' possible there might be an issue with the clutch fork or pressure plate, but it seems unlikely with only 13k on the clutch...
how much effect could the wrong fluid in the transmission have ?
and we are dropping it tomorrow gonna look inside see if the clutch release fork or the throw out bearing are the cause or anything else in there
I spoke to a Mini Tech at Mini USA he said to read some articles he sent me
honestly we are stumped on this one its time to start taking S*** apart
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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Quote:
Originally Posted by raycanales
Quote:
Originally Posted by kenatminimania
How many miles on the clutch?
last night we did the stick trick
where you put a stick overnight pushing the clutch to the floor see if that makes any difference
according to Pelican Parts Tech that is one step that is in their instructions and see if that works.
Im at wits end here
If the clutch hydraulic lines and the clutch master and slave have all been checked out, not sure where else to look.
It 'may be' possible there might be an issue with the clutch fork or pressure plate, but it seems unlikely with only 13k on the clutch...
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Cars in Garage: 0
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Quote:
Originally Posted by kenatminimania
How many miles on the clutch?
last night we did the stick trick
where you put a stick overnight pushing the clutch to the floor see if that makes any difference
according to Pelican Parts Tech that is one step that is in their instructions and see if that works.
Im at wits end here
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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How many miles on the clutch?
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Quote:
Originally Posted by kenatminimania
Quote:
Originally Posted by raycanales
Quote:
what is the correct procedure to bleed the slave are there steps that we are not following ?
a. remove slave cylinder from transmission housing
b. compress slave using this tool or similar
c. open valve on slave and bleed, close valve when done
d. remove slave compression tool
e. bleed system again
f. re-install slave onto transmission housing
We put in a new MC power bled the system and still feels mushy the pedal does stay up but the car still wont go into gear like the shaft on the slave is not pushing out far enough
thoughts?
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Quote:
Originally Posted by kenatminimania
Quote:
Originally Posted by raycanales
Quote:
what is the correct procedure to bleed the slave are there steps that we are not following ?
a. remove slave cylinder from transmission housing
b. compress slave using this tool or similar
c. open valve on slave and bleed, close valve when done
d. remove slave compression tool
e. bleed system again
f. re-install slave onto transmission housing
it doesnt seem that the shaft is extending far enough and feels mushy so going to power bleed the system again today
I would have never figured this could be so hard to bleed a clutch system
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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Quote:
Originally Posted by raycanales
Quote:
what is the correct procedure to bleed the slave are there steps that we are not following ?
a. remove slave cylinder from transmission housing
b. compress slave using this tool or similar
c. open valve on slave and bleed, close valve when done
d. remove slave compression tool
e. bleed system again
f. re-install slave onto transmission housing
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Cars in Garage: 0
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Quote:
Originally Posted by kenatminimania
It 'sounds like' the clutch is not fully releasing, just enough to where it prevents shifting when stopped. Once you are moving, you can still shift with the clutch not fully releasing because everything is spinning at that point.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Cars in Garage: 0
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Quote:
Originally Posted by kenatminimania
It 'sounds like' the clutch is not fully releasing, just enough to where it prevents shifting when stopped. Once you are moving, you can still shift with the clutch not fully releasing because everything is spinning at that point.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
power bled the slave and it is doing the same thing the clutch still feels mushy like there is still air in the system and the slave is not pushing the lever far enough to engage or disengage the clutch while the car is on, the next we are going to do is replace the master cylinder under the dash any thoughts?
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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It 'sounds like' the clutch is not fully releasing, just enough to where it prevents shifting when stopped. Once you are moving, you can still shift with the clutch not fully releasing because everything is spinning at that point.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
As for the reason the clutch is not fully releasing, it can be the slave or maybe the shift lever / fork that presses against the throwout bearing might be bent... Lets hope it is the slave.
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Cars in Garage: 0
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Quote:
Originally Posted by kenatminimania
Did the new clutch slave make a difference?
We are installing that today the better nor reconditioned part will be in today , My mechanic seems to think that is the problem.
there are no weird noises coming from the gearbox of shifter
to be honest im stumped these things are not that hard to figure out , well at least I thought they werent.
In your humble opinion what do you think it could be?
Total posts: 2271
Last post: May 23, 2023 Member since:Dec 29, 2004
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Cars in Garage: 1
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Did the new clutch slave make a difference?
Total posts: 13
Last post: Mar 12, 2020 Member since:Feb 15, 2020
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Cars in Garage: 0
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Quote:
Originally Posted by kenatminimania
Once you get going with the car in gear, are you able to shift normally?
Found 24 Messages