[DeTomaso] Throwout Bearing for Centerforce Clutch

Thomas Tornblom Thomas.Tornblom at Hax.SE
Sun Oct 25 18:43:13 EDT 2009


I'm using a Federal Mogul 1625 bearing with my Centerforce clutch.

I've been told there are two different inner diameter bearings,  
depending on the carrier. 1625 was correct for my 1984 car. The  
bearing is around $30 from Summit.

I have not looked at the bearing since installation, so I have no idea  
if there is any strange wear.

Thomas

25 okt 2009 kl. 23.33 skrev Scott Couchman <scottcouchman at yahoo.com>:

> I'm sure this has been discussed before, but I searched the archive  
> and couldn't find it, so bear with me please. I've got my ZF out on  
> the garage floor and the TO bearing out, but I want to make sure I  
> replace it with the correct one, and I'm concerned that I may have  
> another problem that I don't understand.
> As a reminder, I was in Ely last month ready to run the Silver State  
> when my Pantera started to make noises that sounded like a bad  
> throwout bearing. It didn't make any noise when the clutch pedal is
> out (no load on the bearing) or when the clutch pedal is in all the  
> way (full load on the bearing). It only
> made noise occasionally when the clutch pedal
> was depressed or released
> as the clutch started to engage. Once engaged, it did not make any  
> noise.
> So, in the normal shifting sequence, no noise when I push the clutch  
> in and
> hold it while the car is stationary, noise starts as I let the  
> clutch out and the
> clutch starts to engage, and finally, no noise when the pedal is out  
> and the
> clutch is engaged and the car is moving. I drove the car home 500  
> miles with
> not problems and have finally gotten around to pulling the ZF.
> I have a
> centerforce clutch with a heavy duty centerforce pressure plate
> assembly from Bob Byers. I looked at SOBill's data spreadsheet and it
> recommends a Ferderal Mogul 1697 bearing. I contacted my local NAPA
> store and that bearing retails for $97 and is available for about  
> $50 cross
> referenced to a NAPA #N1085. The bearing I've been using says TT 1181
> and USA on it.
> My problem is with the bearing in my hand, it sounds fine and looks  
> fine
> EXCEPT it shows rubbing-metal-wear around a chamfered surface near the
> outer OD of the bearing facing the flywheel. I've posted photos on  
> the POCA
> photo page. This chamfered surface seems to have been contacted by the
> moving weights on the centerforce clutch that effect the increased  
> force on
> the flywheel during operation. These weights are held in place by the
> multitude of fingers and a circular spring that allows the weights  
> to move in
> and out with rpm. These weights seem to be wearing on this
> chamfered
> surface and creating a rough/worn
> surface that I
> think may be the source of
> my noise.
> I'm wondering if I have the wrong throwout bearing or a bad clutch  
> or wrong
> installation or it's making a normal nasty noise. Anyone seen this  
> before?
> Anyone know the correct throwout bearing to use on a centerforce  
> clutch?
> Anyone know if I'm asking the right questions??? Thanks Scott
>
>
>
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