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#1 |
Registered User
Join Date: Jun 2009
Location: Eugene, OR
Posts: 200
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Saginaw Transmission/Clutch problems
I have a '66 Chevy long be pickup with a 327 and a saginaw 4sp. About two years ago I had the tranny rebuilt at the same time the engine was rebuilt. After the tranny was installed, with a new clutch, throwout bearing and roller pilot bearing, I was not able to downshift into 2nd...it would grind. Everything else was fine. Three months ago, I pulled the tranny and took it back to the mechanic that rebuilt it. He said that the synchro had broke. He repaired it and I reinstalled the tranny. It worked great for the past three months, until today. I was at a stop light in neutral and when I tried to shift it into 1st gear, it would not go in at first. After a few tries, it finally went in. When I pulled away, the clutch pedal began vibrating very loudly. When I pushed the clutch pedal, the vibrating would stop. No problem shifting into 2nd. When I tried to shift into 3rd, it would grind a little. When I shifted it to 4th, there was no 4th. After a few throws back and forth, 4th would finally engage. Every time I try shifting into 4th, this happens. No matter what gear it was in, the clutch pedal vibrates very loudly. When I depress the clutch, nothing feels out of the ordinary. What could be wrong?
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Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson Last edited by Sicboy; 01-29-2012 at 02:44 AM. |
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#2 |
Registered User
Join Date: Jun 2009
Location: Eugene, OR
Posts: 200
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Re: Saginaw Transmission/Clutch problems
Anybody???
This morning, I checked the linkage and adjusted the clutch. I'm still having the same problem. The clutch pedal still rattles loudly and I can find 4th about 1 in 20 tries. Even when I manually put the tranny in 4th from underneath, I still get nothing...most of the time. FYI, I have no problem getting it into 1st, 2nd, 3rd and reverse.
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Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson |
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#3 |
Registered User
Join Date: Jul 2010
Location: USA
Posts: 48
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Re: Saginaw Transmission/Clutch problems
First off, Get a new Transmission Guy!
The pedal vibrating could be traced back to a couple of things. Throw-out bearing bad, Bent clutch fork, Bent input shaft, or you could have something wrong with your pressure plate. Either way it has to be something connected to your clutch pedal assembly to cause a vibration like that. It could also be your clutch linkage resting on your exhaust! As for not being able to get in to 4th gear, it has to be something with your shifter or clutch engagement or an internal transmission problem. I would bring it to another trans. shop for a second opinion! Good luck. |
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#4 |
Registered User
Join Date: Jun 2010
Location: gadsden, alabama
Posts: 468
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Re: Saginaw Transmission/Clutch problems
pull the trans and check the front bearing, if the bearing is bad it will allow the main drive to slide back just enough to not allow 4th gear engagement and also will have the symptoms you described with your clutch
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Due to financial constraints, the light at the end of the tunnel will be shut off until further notice |
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#5 |
Registered User
Join Date: Jun 2009
Location: Eugene, OR
Posts: 200
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Re: Saginaw Transmission/Clutch problems
So the mechanic who rebuilt the tranny says that the input shaft bearing, along with various other parts, is shot. He claims the reason is that my bell housing is a truck bell housing and the tranny is from a car. He says that the hole in the bell housing is too large for the tranny. Can this be the case or is it a line of bull ****?
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Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson |
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#6 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: Saginaw Transmission/Clutch problems
Absolutely could be the case. You can not run a trans with a small index ring on the bearing retainer in a bell housing with the larger index ring opening. The 4 mounting bolts are not sufficient to locate the trans in the properly aligned location. You CAN run a trans / bell index mismatch, but not for long at all before you burn up input shaft bearings, the pilot bearing, and a host of other things. That could be your root cause of the problems you're seeing.
EDIT - did the mechanic actually SEE your bell housing? The big hole index he's referring to is larger than 5" - the small index on your trans's bearing retainer is less than 5" - if this is the case, then I'd have to agree with the mech. if he's just guessing you have a large hole bellhousing - you need to confirm that you have one. not all trucks had the large hole bell. |
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#7 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: Saginaw Transmission/Clutch problems
to be more exact -
the small dia index ring is 4.686" the big dia index ring is 5.125" |
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#8 |
Registered User
Join Date: Jun 2009
Location: Eugene, OR
Posts: 200
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Re: Saginaw Transmission/Clutch problems
Yea, we matched up the bearing retainer to the hole on the bell housing. The hole was about 1/2" bigger than the retainer. In search of a Muncie now.
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Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson |
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#9 |
Registered User
Join Date: Dec 2008
Location: Andrews, NC
Posts: 194
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I agree with Patina!
This was really an easy catch if the mechanic was paying attention. He should have caught this during the rebuild. Switching out the Bell housing would have prevented the early failure. |
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#10 |
Registered User
Join Date: Jul 2009
Location: sparks nv
Posts: 142
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Re: Saginaw Transmission/Clutch problems
munchie is a small bearing retainer as well unless you are refering to a sm465
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64 chevy c10 swb fleet small back window , in progress 454/400 swap , disc front disc rear , and just geting it on the road . 09 ford f350 cc swb 4x4 6.4l , to haul the others home . 2011 chevy hhr not mine but love the milage .. ![]() |
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#11 | |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Saginaw Transmission/Clutch problems
Quote:
ron |
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#12 | |
Registered User
Join Date: Jun 2009
Location: Eugene, OR
Posts: 200
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Re: Saginaw Transmission/Clutch problems
Quote:
__________________
Project Build (1): http://67-72chevytrucks.com/vboard/s...d.php?t=362482 Project build (2): http://67-72chevytrucks.com/vboard/s...d.php?t=370985 “Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming...Wow, What a Ride!” - Hunter S. Thompson |
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