torque converter/fly wheel gap
May 20, 2013 | 10:47 AM
#1
Thread Starter
Staging Lane
Joined: May 2013
Posts: 67
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From: LA.
torque converter/fly wheel gap
Yes Im new. I was on here a few years ago but not a regular. Anyhow.....hello.
Alright...I have a 4L60E that I have had rebuilt 3 times. 3/4 go's out because of my foot. Well I used a new guy to build it because I moved out of my home state. OK. now heres the problem:
I have installed, not rebuilt, around 75+ trans in my life. Im pushing 50, and when I have put the torque converter in the bell housing of course you have to turn it like three different stages for it to seat. When I lift trans and bolt bell housing on, there is a 1/2 inch gap between torque converter and fly wheel. Usually there is a 1/4 but usually less. Now when I move the Torque converter towards flywheel flush to bolt on, it is coming out of trans enough to were it is no longer seated. So I tell the guy that rebuilt it and he said that is normal gap. I call BS. Then he tried to say they boxed the torque converter wrong. Well I put the old torque converter that came out of it back in to see whats up and get the same results. I think the main shaft for some reason is set back to far. I dont know if this is possible and dont want to sound like a fool if I tell him this so I was hoping for some feed back. When Torque converter is seated in Trans, I can put trans in Reverse position, turn converter, and tail shaft turns, when converter is flush against flywheel and turn converter, tail shaft does not turn. This leads me to believe converter is no longer seated in trans and that moving it the 1/2 inch out is the problem. I know it is hydraulic but it turns when in a gear position. Why the gap? THANKS!!
Alright...I have a 4L60E that I have had rebuilt 3 times. 3/4 go's out because of my foot. Well I used a new guy to build it because I moved out of my home state. OK. now heres the problem:
I have installed, not rebuilt, around 75+ trans in my life. Im pushing 50, and when I have put the torque converter in the bell housing of course you have to turn it like three different stages for it to seat. When I lift trans and bolt bell housing on, there is a 1/2 inch gap between torque converter and fly wheel. Usually there is a 1/4 but usually less. Now when I move the Torque converter towards flywheel flush to bolt on, it is coming out of trans enough to were it is no longer seated. So I tell the guy that rebuilt it and he said that is normal gap. I call BS. Then he tried to say they boxed the torque converter wrong. Well I put the old torque converter that came out of it back in to see whats up and get the same results. I think the main shaft for some reason is set back to far. I dont know if this is possible and dont want to sound like a fool if I tell him this so I was hoping for some feed back. When Torque converter is seated in Trans, I can put trans in Reverse position, turn converter, and tail shaft turns, when converter is flush against flywheel and turn converter, tail shaft does not turn. This leads me to believe converter is no longer seated in trans and that moving it the 1/2 inch out is the problem. I know it is hydraulic but it turns when in a gear position. Why the gap? THANKS!!
Last edited by ferrellrooster; May 20, 2013 at 12:15 PM.
May 20, 2013 | 12:09 PM
#2
Joined: Jan 2006
Posts: 16,282
Likes: 438
From: Huntsville, AL
That is way too much gap. Spec is between 1/16 and 3/16, if its more than that, you need to shim the converter. As far as why its different, im not sure.
Last edited by Atomic; May 20, 2013 at 12:41 PM.
May 20, 2013 | 12:19 PM
#3
Thread Starter
Staging Lane
Joined: May 2013
Posts: 67
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From: LA.
thank you. I thought the same thing that it is way to much. I just posted a picture from the sight hole. And I was thinking to shim it as well. I just cant figure out why out of three rebuilds with this trans. Why now such a gap. I measured the old converter and the new one. The shaft length (female) on the new converter is about 1/8th longer than the old one. If it was 1/2 longer then I wouldnt have this issue it seems.
But if I shim converter then it will not sit in the crank. it will be sitting just on the bolts themselves.
But if I shim converter then it will not sit in the crank. it will be sitting just on the bolts themselves.
Last edited by ferrellrooster; May 20, 2013 at 12:33 PM.
May 20, 2013 | 01:26 PM
#5
Thread Starter
Staging Lane
Joined: May 2013
Posts: 67
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From: LA.
I'm guessing that is a reman torque converter. It is out of spec. I'd take it back.
When a converter has been cut open multiple times, it gets "shorter" each time.
that makes sense and was our first thought, but I put the old one back in and I have the same result, same gap, and when bolted it comes out of trans as well. So I would think this would eliminate the converter. I may be wrong. I am not familiar with the internals of a trans, so I dont know if somehow the front main shaft is somehow setting back farther and causing this gap. Was there something left out? is there a way for the shaft to go in with the clutches and all and set back farther? Man I dont know. If I choose to "shim" I could make up 1/4 inch by shimming the flywheel. But if I "shim" converter I dont think it will seat in the crank leaving all the weight in the bolts unless someone has another proven way Im out of ideas.
When a converter has been cut open multiple times, it gets "shorter" each time.
that makes sense and was our first thought, but I put the old one back in and I have the same result, same gap, and when bolted it comes out of trans as well. So I would think this would eliminate the converter. I may be wrong. I am not familiar with the internals of a trans, so I dont know if somehow the front main shaft is somehow setting back farther and causing this gap. Was there something left out? is there a way for the shaft to go in with the clutches and all and set back farther? Man I dont know. If I choose to "shim" I could make up 1/4 inch by shimming the flywheel. But if I "shim" converter I dont think it will seat in the crank leaving all the weight in the bolts unless someone has another proven way Im out of ideas.
May 21, 2013 | 11:01 AM
#6
Thread Starter
Staging Lane
Joined: May 2013
Posts: 67
Likes: 0
From: LA.
I have the answer guys:
some trans mech. are so good that they can rebuild them blind folded. they get in a rhythm and slap it back together. Well they guy I used to build mine is a 1/4 mile 1/2 drag guy that also lives on the dirt track. He has been building them for over 30 years. That being said, despite the mistake Im fixing to inform about, he really is good at what he does and I would use him again. In the pump assembly he put the drive gear in backwards. easy mistake but caused the converter to seat 1/2" further in. Causing the gap between the flywheel and converter. And when converter bolted on fly it pulled converter out of pump. Also I made the mistake of going head and bolting converter to fly and putting fluid in it and cranked it and broke pump. Great news!! More parts!! All in All thanks for the feedback. THANKS GUYS!!
some trans mech. are so good that they can rebuild them blind folded. they get in a rhythm and slap it back together. Well they guy I used to build mine is a 1/4 mile 1/2 drag guy that also lives on the dirt track. He has been building them for over 30 years. That being said, despite the mistake Im fixing to inform about, he really is good at what he does and I would use him again. In the pump assembly he put the drive gear in backwards. easy mistake but caused the converter to seat 1/2" further in. Causing the gap between the flywheel and converter. And when converter bolted on fly it pulled converter out of pump. Also I made the mistake of going head and bolting converter to fly and putting fluid in it and cranked it and broke pump. Great news!! More parts!! All in All thanks for the feedback. THANKS GUYS!!
Last edited by ferrellrooster; May 21, 2013 at 11:13 AM.
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May 21, 2013 | 12:27 PM
#8
Thread Starter
Staging Lane
Joined: May 2013
Posts: 67
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From: LA.
yea I know. But Ol boy said bolt it up and put some fluid in it. Thats why he is fixing it for nothing. Plus the gear backwards didnt help. All good though. Will be trying to burn up 3-4 by the weekend. BAHAHA
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