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09-12-2018, 10:46 AM
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#1 |
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Almost Satisfied
 
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Flexplate Question
I have an 03 LQ4 that came out of a Denali Yukon. I assume it had a 4L60 behind it. I am going with a 4L80e. I am changing out converters, so the new one should be a 3 bolt pattern converter from Circle-D. My flexplate only has 3 holes for the converter now. Do I need a different flexplate for the 4L80 or will the one I have work. The plate I have has #TU2824G stamped on it. Thanks
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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09-12-2018, 01:17 PM
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#2 |
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Registered User
Join Date: Jun 2003
Location: ga
Posts: 630
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Re: Flexplate Question
you will need a 6.0 flex plate it has 6 bolt holes and the 4l80e converter uses 6
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4x4k30 if trouble was money i would have plenty Last edited by 4x4k30; 09-12-2018 at 01:24 PM. |
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09-12-2018, 02:53 PM
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#3 |
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Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Flexplate Question
The LQ4 is a 6.0. I understand the newer converters for the 80 have the three bolt set up. This is what I am trying to confirm.
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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09-13-2018, 10:38 AM
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#4 |
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Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Flexplate Question
I called Brian Tooley this morning and they said the Circle-D converter just has 3 bolts instead of the six so I should be fine. He didn't give me a warm fuzzy, but I will order the converter and see what I get to work.
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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09-13-2018, 11:08 AM
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#5 |
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Registered User
 
Join Date: Mar 2013
Location: Lenexa, KS
Posts: 547
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Re: Flexplate Question
Depends on which Circle D converter you are buying. The HP series 278mm only fits the dished 60e style flex plate. The pro converters fit the flat 80e flexplate.
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09-13-2018, 11:33 AM
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#6 |
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Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Flexplate Question
It is the 278mm series according to the quote they sent me. So, it should work?
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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09-13-2018, 11:35 AM
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#7 |
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Registered User
Join Date: Mar 2013
Location: Lenexa, KS
Posts: 547
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Re: Flexplate Question
http://www.circledspecialties.com/4l80-hp-series-278mm
Towards the bottom of the page "ONLY fits the dished LS style flexplate" Sounds like you are good to go. |
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09-13-2018, 11:55 AM
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#8 |
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Almost Satisfied
Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: Flexplate Question
Here is what I have. Thanks for your help.
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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