FS5W71B Swap - clutch slipping at higher RPM

[iancshafer]

I did a swap from the four speed, to an FS5W71B. I kept the original clutch and pressure plate, bought a new throw out bearing and clutch fork for the new FS 5W71B. It had an L engine housing already and bolted straight on.

 

I can reverse and get into first gear, but when I going to higher gears at higher rpm's the clutch slips. I have tried to adjust the clutch adjustment bolt thinking I needed more pressure on the clutch to the pressure plate, maybe I haven't found the sweet spot?

 

Any advice appreciated.

[Lockleaf]

Which release bearing collar did you use? The one from your 4 speed or the one from your new 5 speed?

[iancshafer]

I bought a new throw out bearing for the 5 speed. I may have got this wrong, but thought the clutch pressure plate is mates to the engine and the throw out bearing is specific to the trans.

[john510]

Was the new throwout bearing already attached to a sleeve ? I think the the throwout and sleeve are mated to the clutch not the trans.

[Lockleaf]

I mean the thing that the bearing sits pin and the fork clips to. Is that from the 4 speed or the 5 speed?

 

This part.

 

[iancshafer]

It was the 5 speed

[bananahamuck]

You should have used the same collar as the 4speed since not all clutch plates are the same height/depth,,, or measured to see if the collars were the same / different.

 

Is there any adjustment on the slave cylinder rod ?

 

BUT is it slipping when you are in 5th and loading it down,, such as going up a grade??  It might just be you need a new clutch and the 4speed didn't show it as much as 5speed will.. I would pull tranny out and compare collars first and go from there.

[datzenmike]

 ONE
 

I did a swap from the four speed, to an FS5W71B. I kept the original clutch and pressure plate, bought a new throw out bearing and clutch fork for the new FS 5W71B. It had an L engine housing already and bolted straight on.

I can reverse and get into first gear, but when I going to higher gears at higher rpm's the clutch slips. I have tried to adjust the clutch adjustment bolt thinking I needed more pressure on the clutch to the pressure plate, maybe I haven't found the sweet spot?

Any advice appreciated.

 
If you have a new FS5W71B clutch arm, it does not have the hole in it for the adjustable slave push rod. If you are able to adjust it then something here is not adding up. You need an FS5W71B slave pushrod or the 4 speed clutch arm with the adjustable rod. Mixing these two may be the problem. Your clutch slave pushrod may be too long.

 

 

TWO

Having said this. Your clutch arm should have a small amount of play or looseness between it and the pushrod. It should not be tight.
 
 
Figure this out before going to 
 
THREE
Take 5 speed transmission out.
Take new release bearing off the 5 speed collar. (tag the collar as not L16 and put in sock drawer)
Put new release bearing on your old 4 speed collar.
Install new bearing /old collar on 5 speed clutch arm
Install transmission.
Enjoy driving around.
 
 
You 4 speed collar is matched to your clutch. It's a 200mm.
 
The new 5 speed collar could be matched to who knows what??? clutch.
 
Keep your 4 speed collar with your clutch. They were made for each other.
 
Release bearings are all the same part.

[datzenmike]

I mean the thing that the bearing sits pin and the fork clips to. Is that from the 4 speed or the 5 speed?

 

This part.

 

 

Lockleaf I know this is just a visual example for showing what you are talking about.  However the collars are NOT, in any corner of our 11 dimension universe, related to the transmission. The collar is intimately related / married / wedded / matched to the clutch pressure plate. So anyone looking at this ignore the transmission labels and just know there are different sizes.

 

If you had a Type B 4 speed and put a later Type B 5 speed in, according to this chart you would have to swap the collar, and you do not. You would keep the original collar and just change the transmission.

[iancshafer]

Many thanks! First transmission swap, appreciate the help. Will give it a try next weekend.

[iancshafer]

 ONE

 

 

If you have a new FS5W71B clutch arm, it does not have the hole in it for the adjustable slave push rod. If you are able to adjust it then something here is not adding up. You need an FS5W71B slave pushrod or the 4 speed clutch arm with the adjustable rod. Mixing these two may be the problem. Your clutch slave pushrod may be too long.

 

Question for you Mike, I was a bit baffled by this and it turned out one of my team members modified the clutch fork by drilling a hole in it to accommodate the slave push rod.  Do you foresee any issues with this?  

[banzai510(hainz)]

just use the old stuff. meaning the t/o collor

I have a 5 speed but used the orginal fork. but if its drilled out then should be the same adjustment

[iancshafer]

That's assuming I have the old part, sadly we tossed the old t/o bearing assembly.  Need to start digging around the shop.  Lesson learned.

[datzenmike]

I see no problem with this. There has to be a slight clearance between the arm and the push rod adjuster. A small wiggle room.

 

 

Never throw stuff away. Label it and put somewhere.

[iancshafer]

Thanks gents, worked like a charm! Clutch is nice a tight now, shifts like a dream.

[banzai510(hainz)]

well what was the fix

[iancshafer]

Put in the 510 throw out bearing vs the 280zx throw out bearing. I mistakenly thought the t/o bearing was matched to the trans vs. the pressure plate.

[datzenmike]

The throw out bearing are the same. You mean the collars that hold the bearing.

[KoHeartsGPA]

Now that you got it all squared away....how about you throw us a bone or two.....

 

Oics please!

[iancshafer]

Here are the before and after - installed the right t/o assembly.  The bearings do look a little different, but i am guessing that is normal per Mike's earlier comment about them being the same and the T/O collars are different.

 

https://drive.google.com/open?id=0BxFXomNCkdI-ekhSTXFYX0FYRVE

 

Here are some pics of the car, we do endurance racing with her mostly 24 Hrs of Lemons.  We are racing at Millville, NJ NJMP on May 14-15th if you are in the area!

 

https://drive.google.com/open?id=0BxFXomNCkdI-aDRvZWJ3dUU4VVE

 

https://drive.google.com/open?id=0BxFXomNCkdI-RlU5TkRCYzZKT1E

 

https://drive.google.com/open?id=0BxFXomNCkdI-RjQyZW5PeUJuSXM

 

https://drive.google.com/open?id=0BxFXomNCkdI-bUk1ZEVmT01CWEk

[banzai510(hainz)]

I had the same proplem but I bought the t/obearing and collar together and was in wrong box