Engine / Tranny Help
Thread Starter
Instructor
Joined: Sep 2007
Posts: 125
Likes: 0
From: Paso Robles CA
Engine / Tranny Help
First HAPPY THANKSGIVING!
I have asked this before but am still struggling with my torque convertor to flywheel spacing. When placing the torque convertor on the shaft I get over the two splines and then the notches in the convertor go over the two tabs further toward the tranny body on the spline. I measured the slots on the torque convertor and they are 1/2" deep. I placed the convertor over the splines until it contacts the tabs. I took a measurement at this point. I then rotated the convertor until it slid over the tabs (I have the tabs vertical and the slots marked on the convertor to ensure alignment). I took another measurement and the torque convertor moved 1/2". However when I measure from the mating surface of the tranny to the bolt holes I have 9/16" of an inch. When I measure from the mating surface of the block to the flywheel holes I get 1". This means the torque convertor will hit the flywheel before the case and block mate up. I understand that the convertor should move freely when the case and block are mated. What am I missing? Is there any way that the rebuild of the tranny might not be correct limiting how far the convertor will go on the shaft? HELP!
scott
I have asked this before but am still struggling with my torque convertor to flywheel spacing. When placing the torque convertor on the shaft I get over the two splines and then the notches in the convertor go over the two tabs further toward the tranny body on the spline. I measured the slots on the torque convertor and they are 1/2" deep. I placed the convertor over the splines until it contacts the tabs. I took a measurement at this point. I then rotated the convertor until it slid over the tabs (I have the tabs vertical and the slots marked on the convertor to ensure alignment). I took another measurement and the torque convertor moved 1/2". However when I measure from the mating surface of the tranny to the bolt holes I have 9/16" of an inch. When I measure from the mating surface of the block to the flywheel holes I get 1". This means the torque convertor will hit the flywheel before the case and block mate up. I understand that the convertor should move freely when the case and block are mated. What am I missing? Is there any way that the rebuild of the tranny might not be correct limiting how far the convertor will go on the shaft? HELP!
scott
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Helpful to know the tranny type and the engine also....
Years ago....I ran into something about this, and the cure was to space off the bellhousing with washers, but you need extend the locating pins also....
the clearance back when was about 3/8+ off also....
have you tried to mate them up yet?? maybe give it a try witout too much force, and see it it slips home easy enough....
make sure you flip that converter a thousand times while wiggling and jiggling it back to the pump, them thing got more hangups than a art gallery....
Years ago....I ran into something about this, and the cure was to space off the bellhousing with washers, but you need extend the locating pins also....
the clearance back when was about 3/8+ off also....
have you tried to mate them up yet?? maybe give it a try witout too much force, and see it it slips home easy enough....
make sure you flip that converter a thousand times while wiggling and jiggling it back to the pump, them thing got more hangups than a art gallery....
Thread Starter
Instructor
Joined: Sep 2007
Posts: 125
Likes: 0
From: Paso Robles CA
It is a 1975, 350ci with I believe a 350 or 400 tranny. These two were together previously but I do not recall if there was spacing or not. I feel confident that there is no more for the convertor to move as it is bottoming out on the slots. I have had the two together by aligning the flywheel/convertor holes up and then allowing the bolts to pull the casing and block together however everyone I have talked to says this is not correct and there should be a gap between flywheel and convertor so the convertor can spin free when lining bolts up. I can move the convertor by prying but that is it. Anyone else have ideas?
scott
scott
Heel & Toe
Joined: Oct 2008
Posts: 17
Likes: 0
It is a 1975, 350ci with I believe a 350 or 400 tranny. These two were together previously but I do not recall if there was spacing or not. I feel confident that there is no more for the convertor to move as it is bottoming out on the slots. I have had the two together by aligning the flywheel/convertor holes up and then allowing the bolts to pull the casing and block together however everyone I have talked to says this is not correct and there should be a gap between flywheel and convertor so the convertor can spin free when lining bolts up. I can move the convertor by prying but that is it. Anyone else have ideas? yes call a tranny shop there is a trick line up dont force or shim its a little alignment trick that i dont remember but i do remember buying a new converter the second time call a shop its a little thing they will tell you
scott
scott
Thread Starter
Instructor
Joined: Sep 2007
Posts: 125
Likes: 0
From: Paso Robles CA
UNCLE!!! I have rechecked, triple checked, measured, farted and cussed 
. I have had the engine and tranny apart 5 times and pulled the combo twice and still can not get the clearances that everyone says I should have . Can someone answer is there anyway the tabs on the spline could be installed incorrectly preventing the convertor from sliding all the way on?
scott
. I have had the engine and tranny apart 5 times and pulled the combo twice and still can not get the clearances that everyone says I should have . Can someone answer is there anyway the tabs on the spline could be installed incorrectly preventing the convertor from sliding all the way on?scott
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
I have had difficulty getting torque converters in all the way in the past, but not this much. Remove the converter and make sure there are no burs on the splines or tabs in the tranny or converter. stand the tranny up on the tail and put the converter in and spin it till it drops 3 times. When it's in all the way you won't be able to get your fingers between it and the bell housing.
Thread Starter
Instructor
Joined: Sep 2007
Posts: 125
Likes: 0
From: Paso Robles CA
Thanks Aktbird. I can feel the convertor go over all three areas. I even measured when the slots (1/2") in the convertor contacted the tabs on the spline, rotated the convertor and slid on 1/2". This tells me I am all the way in, however there is no spacing between the convertor and flywheel when I match up bell housing and block. I am beginning to think I am okay with the alignment and may just go with it.
scott
scott
Thread Starter
Instructor
Joined: Sep 2007
Posts: 125
Likes: 0
From: Paso Robles CA
One last question (at least on this subject) - the slots on the convertor line up with two tabs near the spline shaft. Are these two tabs the pump drive that I have had others tell me about?
scott
scott
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