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Fork Not Seated to Throwout Bearing?
Does anyone happen to have an image through their the top of their transmission to confirm that I did a perfectly below average job of ensuring that I seated the fork properly on the throwout being after I dropped and reinstalled the motor? It is a 930 transaxle.
Pulled the motor for some maintenance and then realized the clutch would not disengage and the transmission would grind when attempting to select reverse. Let this be a lesson to you all! Verify before you reinstall the motor. ![]() ![]()
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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Yep, that’s a miss. You need the fork on the other side of the release bearing ears.
Sort of like this pic, although this guy’s fork was too thick to fit so ignore that ![]()
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Ken 1986 930 2016 R1200RS |
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So the fork looks fine but no matter what I try, I can only seem to get the upper finger OR lower finger around the throw out bearing. Is there any trick to this?
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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Join Date: Nov 2001
Location: top of 3rd
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ugggggggggggh
sorry no help beyond btdt, yer certainly not alone unfort - that suuuuuuuuuuuuuux I tap'd the fukk OUT and sent it to be redone lame dude - good luck |
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Join Date: Mar 2011
Location: Nova Scotia, Canada
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Was the transmission working ok before you removed the motor; and, you removed the engine and transmission as a unit, correct?
If it was fine before you removed the driveline, your parts are likely fine. Your installation may need some finesse. Hearsay has it that there is a top and a bottom ear for the TOB. Also you need to have the engine and transmission on exactly the same horizontal plane as you slide them in place. When I did mine last winter it took a few goes to get those arms into the TOB ears, particularly the bottom one which is difficult to see. Not much margin for error. Good flashlight, mirror, patience, and persistent checking ultimately worked for me. I would keep trying. Turn the bearing to change which TOB ear is on top and you may get a win. Good luck. |
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I had issues once. I assembled everything then installed engine, then found clutch would not work. The forks were engaged. WTF. So, what to do?
Pulled engine out again, split bellhousing and rotated the TOB ears 180 deg. For no particular reason - except the clutch worked fine before. Nothing else I can fiddle with. It worked fine and still does. So next time I pulled it down, I scribed T and B on the ears of the TOB. Works every time. Don't ask me why. Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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Any way I can test it without putting the motor back in?
I got the fork seated but it seems like the bottom might not be seated with the same contact patch as the top from the snake camera video I took.
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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I am presuming you have flipped the lugs 180 deg?
Whichever orientation gives the best fit I would run with. I don't think I could spot a difference when I did mine - altho may not have looked close enough. Yes - would be nice to be able to test before installing. But I have never tried cranking on the fork. Maybe it is possible. Maybe someone else has. Am about to install a new clutch in mine. Will be going thru the same process next week. Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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She works again. Thanks for all the help. A few things to finish buttoning up but glad to have gotten her functioning appropriately after two motor drops in about a month.
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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Did you flip the lugs?
If so it would seem prudent anytime someone splits a working clutch, to mark the orientation, and save another engine drop. Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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I did, and it looked exactly the same as it did before. I couldn’t tell any difference at all. For that reason I didn’t want to mark a top and bottom and trusted that it was seated either way.
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"Purists are the Karens of motorsports. IG - Iron_Dad_Moto 1972 Porsche 911 - Long Term Project. 3.6TT/G96.50 1981 Porsche 911SC - In Progress. F/A-18C/D, F-15C, F-35B/C |
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I can't see the difference either - but mine only works one way - same experience you had.
Which is why I marked them. I have had the clutch split several times now, and no issues - because it goes back the same way every time. Putting the clutch together probably sometime this week. I will look again to see if I can spot the difference. Alan
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83 SC, 82 930 (track) - Stock except for RarlyL8 race headers, RarlyL8 Zork, K27-7006, 22/28 T bars, 007 Fuel head, short 3&4 gears, NGK AFR, Greddy EBC (on the slippery slope), Wevo engine mounts, ERP rear camber adjust and mono balls, Tarret front monoball camber adjust, Elgin cams, 38mm ported heads, 964 IC. 380rwhp @ 0.8bar Apart from above, bone stock:-) |
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