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08-19-2014, 10:20 PM | #21 |
Member
Join Date: May 2011
Location: Texas
Posts: 40
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Re: T-5 to flathead won't shift into gear with engine running.
Donald - good point. I have run into that same problem also, but didn't remember to put in my previous post. Any good clutch shop should be able to reverse the hub.
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08-20-2014, 12:28 AM | #22 |
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Join Date: May 2010
Location: Oregon City, Oregon
Posts: 208
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Re: T-5 to flathead won't shift into gear with engine running.
Thanks for your input. I will do some testing to determine if the clutch is releasing all the way. If not I will leave you my phone number so we can discuss what you have found.
This is the first time I have heard this in any of the articles I've read on T-5 conversions on a flathead or from any of the parts suppliers. |
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08-20-2014, 08:40 AM | #23 |
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Join Date: May 2010
Location: san antonio, texas
Posts: 461
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Re: T-5 to flathead won't shift into gear with engine running.
Init1, its not so much that "the clutch is releasing all the way", its that the disk is forced hadr against the flywheel when the splines on the disk's hub bottom out on the input shaft end of the splines and force the disk against the flywheel. that disk has to slide on the splines and once it bottoms out it cannot slide back from the flywheel and you can only see whats happening with the preasure plate removed and looking through the inspection cover hole while sliding the trans into place.... i also had the flathead flywheel drilled to accept a GM ball bearing poilet bushing as teh ford poilet bushing is SAE and the T5 piolet shaft is metric and useing teh ford bushing with teh t5 input shaft will allow the T5 input shaft to wallow in the slightly larger hole. thats is another problem. so much fun........
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08-20-2014, 03:08 PM | #24 |
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Join Date: May 2010
Location: Oregon City, Oregon
Posts: 208
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Re: T-5 to flathead won't shift into gear with engine running.
Ok guys here's where I am:
With the motor idling at 600 rpm, push in the clutch with no noises, try any gear it will not go in. Will grind in reverse. With the motor off it will shift into any gear with the clutch depressed and not depressed. With the trans in neutral, start the motor and the car does not move. With the trans in gear and clutch depressed to the floor, start the motor and the car Does not move but a slight grinding gouging noise somewhere in the bell housing. Let out the clutch and car moves. With motor still running, shift into neutral but t h e shift lever is stiff. I think something is too close to something causing the input shaft to spin And not allowing the disc to move the correct distance. Any more thoughts before I muster up enough energy to pull the tranny And have a look? |
08-20-2014, 03:24 PM | #25 |
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Join Date: May 2010
Location: East Shore of LAKE HOUSTON
Posts: 11,113
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Re: T-5 to flathead won't shift into gear with engine running.
You've got it figured-out. SOMETHING is still rubbing, just enough to cause the disc to turn. Pull it apart! DD
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08-20-2014, 03:51 PM | #26 |
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Join Date: Jul 2014
Location: Iowa
Posts: 1,634
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Re: T-5 to flathead won't shift into gear with engine running.
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08-20-2014, 03:58 PM | #27 |
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Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: T-5 to flathead won't shift into gear with engine running.
Yep, the problem is the input shaft is turning. Now all you have to do is figure it out. The one thing I would do before you pull it is back it out a little on washers and see if it makes any difference at all. It's an easy check that won't take much effort. You have lots of good inputs on here now to work on.
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08-20-2014, 04:49 PM | #28 |
Senior Member
Join Date: May 2010
Location: Oregon City, Oregon
Posts: 208
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Re: T-5 to flathead won't shift into gear with engine running.
Plenty of great info and thanks to all. I'll try spacing with washers first to see if that solves the problem.
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08-20-2014, 04:56 PM | #29 |
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Join Date: May 2010
Location: Benton Arkansas
Posts: 60
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Re: T-5 to flathead won't shift into gear with engine running.
I used a weird pilot bushing in my turboglide crankshaft 327 w/ t-5. Finally got it to free up by starting it in gear with clutch in. Motor leaked oil from rear main like you never seen. Dropped pan and found that the input shaft after the pilot
area was cutting into the pilot bushing..... and forcing crank forward eating up thrust and then spinning main bearing. I have built more SBC than I can count but never screwed up this bad before. |
08-20-2014, 05:31 PM | #30 |
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Join Date: May 2010
Location: san antonio, texas
Posts: 461
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Re: T-5 to flathead won't shift into gear with engine running.
bite the bullet and pull the trans and remove the preasure plate then slip the disk on the input shaft and you will find the disk is bottoming out on the input shaft splines. all what you say is exactly what i have gone through. that is what is locking up.....
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08-20-2014, 05:40 PM | #31 |
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Join Date: May 2010
Location: Federal Way, WA
Posts: 95
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Re: T-5 to flathead won't shift into gear with engine running.
I had a problem with the same symptoms. Turned out to be the clutch disc hub springs hitting the flywheel to crank bolts. Cut about .040" off the tops of the bolts. Also had a situation where the rivets holding the disc hub assembly together, Hay's 10.5 disc, were rubbing on the flywheel. Had to cut the flywheel recess ID a little bigger about 1/16" deep.
Flat32 |
08-20-2014, 05:47 PM | #32 |
Member
Join Date: May 2010
Location: Federal Way, WA
Posts: 95
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Re: T-5 to flathead won't shift into gear with engine running.
Forgot to mention trans is a T5Z purchased new, crank is 4" Merc with a lightened Merc flywheel. Trans is bolted to a M.E.C. aluminum adapter on a 59 block and I had to shorten the input shaft a bit, maybe 1/2".
Flat32 |
08-20-2014, 06:05 PM | #33 |
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Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: T-5 to flathead won't shift into gear with engine running.
Did you and do you still think you needed the 10.5 in clutch plate? How heavy is the car it is in and what rear gear are you running? I'm not sure that the flathead has enough torque to require the larger clutch on a light car with a low rear end gear. I am looking a running a 9 inch, the lower the rotating mass the faster it will accelerated. Any real world input on the clutch size?
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09-05-2014, 09:02 AM | #34 |
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Join Date: May 2010
Location: Oregon City, Oregon
Posts: 208
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Re: T-5 to flathead won't shift into gear with engine running.
Okay... pulled the tranny. Discovered the adjustment bolts on each of the arms are worn. One of them substantially thinner than the other 2.
This caused the portion of the bolts that protrude through the back side of the arm to just touch the clutch plate springs making the noise heard when I depressed the clutch pedal all the way down This also caused uneven pressure on the disc and would not allow the disc to fully Disengage and causing the trans input shaft to continue spinning No other signs of mis adjustment or damage. The shaft snout was not too long with plenty of clearance Since the plate is original Ford I will have it rebuilt Problem solved! |
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