Weird clutch problem

[byronj]

I'm of no help and thats a new one for me. Maybe call Trent and see what he has to say.

 

[EF1]

Okay boys and girls, time for the latest installment of "What the hell is going on now?"

If you recall, at the last race the trans decided to stop shifting, costing me the win in full view of the checkered flag.
When I pulled off track I pushed in the clutch and the car kept moving. Clutch would not disengage.
It felt like a normal clutch, not like the hydraulics failed, it felt perfectly normal. Just wouldn't disengage.

Sooooo....I removed the s1sequential shifter, replaced the clutch with a new exedy hyper single, a new Ford factory original TOB and TOB spacer from KOHR. All matched pieces.
The clutch seemed to work fine but the trans was too damaged from grinding gears so I removed everything and had the trans rebuilt.
I reinstalled everything and now I get this weird screeching like a bad TOB but its a new Factory Ford part and it wasn't screeching before.
I had only drove it one block with all new parts and it was fine, it was just grinding the syncros. So I removed everything AGAIN and everything looks perfectly normal. I am at a total loss.
Any geniuses out there that can shed some light on this?

It sounds like a problem with the spacer having too much compression on the tob. The tob should be compressed slightly. My mantic required .5 to .625" based on the finger height of the clutch. I am not sure what it should be on the Exedy.

 

[Fabman]

It sounds like a problem with the spacer having too much compression on the tob. The tob should be compressed slightly. My mantic required .5 to .625" based on the finger height of the clutch. I am not sure what it should be on the Exedy.

I went over this exact thing with Kohr. He was adamant that this is the correct spacer, so I have a new TOB coming from ford in the morning and we’ll try this again. Man I’m getting tired of pulling the transmission on this thing.

 

[GAR944]

I'll order you a set.
Apparently they make it really quick to undo things. Feel your pain and fingers crossed.
Now i have watched your video about 50 times, and i'm not a mechanic but see if this means anything to you. Screech doesn't disappear until what i believe is over centre on the down travel from the foot movement. It doesn't start screeching till after the pedal is fully up. Is there anything in the system that releases or start/stops relative to these actions?

 

[EF1]

I went over this exact thing with Kohr. He was adamant that this is the correct spacer, so I have a new TOB coming from ford in the morning and we’ll try this again. Man I’m getting tired of pulling the transmission on this thing.

I would measure it while the trans is out just to be safe. There are a lot of variables with non oem parts.

 

[Fabman]

I would measure it while the trans is out just to be safe. There are a lot of variables with non oem parts.

Yup I installed a new Ford TOB and checked the engagement and it was .625 which is the big end of the range but its running now and its quiet.
Looks like there will be a track day on Sunday after all!

 

[Fabman]

On the upside, I'm getting really good at R&R- ing the transmission on this thing.....so, that's good.