LQ 9 4L80 flexplate - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**gpat@earthlink.net** · 04-20-2016, 08:54 PM

I have bolted up my LQ9 and 4L80 transmission. The flat flexplate is snug against the torque converter and I have a 5/16 " gap between the engine block and the transmission casing. Does anyone know what flexplate to use and or if I need to remove a spacer of sort.GM part numbers would be good. The dealership is clueless. Thanks.

72MARIO · 04-20-2016, 09:24 PM

http://www.ebay.ca/itm/LS1-Flexplate..._qi=RTM2247625

I plan on using this spacer. I have purchased it and I am 99% sure thats all I need. I believe That TCI also make one similar

foamypirate · 04-21-2016, 01:37 PM

Quote:

Originally Posted by gpat@earthlink.net

I have bolted up my LQ9 and 4L80 transmission. The flat flexplate is snug against the torque converter and I have a 5/16 " gap between the engine block and the transmission casing. Does anyone know what flexplate to use and or if I need to remove a spacer of sort.GM part numbers would be good. The dealership is clueless. Thanks.

Make sure your torque converter is fully seated.

ls1nova71 · 04-21-2016, 06:21 PM

Quote:

Originally Posted by foamypirate

Make sure your torque converter is fully seated.

^^^^ This. And also make sure the spacer is on the right side of the flexplate.

**gpat@earthlink.net** · 04-21-2016, 08:29 PM

Hello again. I am missing something. LQ 9 has stock flexplate GM 368 stamped into and a bar code sticker with 531 in red writing on it. On the backside it looks to have a ring about 3/8 " thick attached to it . Six torque bolt wholes six bolts to the crank. Does anyone know if this is the wrong flexplate. Driving me nuts.

**gpat@earthlink.net** · 04-21-2016, 08:56 PM

removed the flexplate . engine side correct . spacer on the back side, looks like i don't need that .

foamypirate · 04-21-2016, 09:34 PM

Quote:

Originally Posted by gpat@earthlink.net

Hello again. I am missing something. LQ 9 has stock flexplate GM 368 stamped into and a bar code sticker with 531 in red writing on it. On the backside it looks to have a ring about 3/8 " thick attached to it . Six torque bolt wholes six bolts to the crank. Does anyone know if this is the wrong flexplate. Driving me nuts.

You need a flat flex plate and a spacer behind it to run a 4L80E, unless you have a custom 4L80E converter with the 4L65e front cover on it.

If you have a dished flex plate and a stock 4L80E converter, it won't work correctly.

ls1nova71 · 04-21-2016, 11:00 PM

I missed the LQ9 part originally, was just thinking 6.0. But if you truly have an LQ9, then it will not have the correct flexplate for a 4l80e, they didn't come with them, so you would most likely have the dished one. You need the flat one with the spacer.

foamypirate · 04-22-2016, 01:13 PM

This is the kit I used to bolt up my 4L80E w/ stock 4L80E converter to my LQ9.

http://paceperformance.com/i-5146385...converter.html

65standard · 04-22-2016, 05:10 PM

My LQ4 has a flat flex plate and no spacer with the 4L80 trans. What is different with the LQ9?

ls1nova71 · 04-22-2016, 05:45 PM

Quote:

Originally Posted by 65standard

My LQ4 has a flat flex plate and no spacer with the 4L80 trans. What is different with the LQ9?

I assume your LQ4 is an older one like a '99 with the longer crank? The LQ9 was never offered with a 4l80e, they had 4l65e's.

Robznob11 · 04-22-2016, 10:49 PM

This is what the correct flex plate should look like.

**gpat@earthlink.net** · 04-23-2016, 10:59 PM

Thanks for all the information. I believe I have have completed the task.

04-20-2016, 08:54 PM	#1
gpat@earthlink.net Active Member Join Date: Jan 2011 Location: columbia, SC Posts: 156	LQ 9 4L80 flexplate I have bolted up my LQ9 and 4L80 transmission. The flat flexplate is snug against the torque converter and I have a 5/16 " gap between the engine block and the transmission casing. Does anyone know what flexplate to use and or if I need to remove a spacer of sort.GM part numbers would be good. The dealership is clueless. Thanks.

04-20-2016, 09:24 PM	#2
72MARIO Registered User Join Date: Nov 2000 Location: Huntsville Ontario Canada Posts: 4,052	Re: LQ 9 4L80 flexplate http://www.ebay.ca/itm/LS1-Flexplate..._qi=RTM2247625 I plan on using this spacer. I have purchased it and I am 99% sure thats all I need. I believe That TCI also make one similar __________________ 1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD

04-21-2016, 08:29 PM	#5
gpat@earthlink.net Active Member Join Date: Jan 2011 Location: columbia, SC Posts: 156	Re: LQ 9 4L80 flexplate Hello again. I am missing something. LQ 9 has stock flexplate GM 368 stamped into and a bar code sticker with 531 in red writing on it. On the backside it looks to have a ring about 3/8 " thick attached to it . Six torque bolt wholes six bolts to the crank. Does anyone know if this is the wrong flexplate. Driving me nuts.

04-21-2016, 08:56 PM	#6
gpat@earthlink.net Active Member Join Date: Jan 2011 Location: columbia, SC Posts: 156	Re: LQ 9 4L80 flexplate removed the flexplate . engine side correct . spacer on the back side, looks like i don't need that .

04-21-2016, 11:00 PM	#8
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: LQ 9 4L80 flexplate I missed the LQ9 part originally, was just thinking 6.0. But if you truly have an LQ9, then it will not have the correct flexplate for a 4l80e, they didn't come with them, so you would most likely have the dished one. You need the flat one with the spacer. __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

04-22-2016, 01:13 PM	#9
foamypirate Registered User Join Date: Apr 2009 Location: Pflugerville, TX Posts: 594	Re: LQ 9 4L80 flexplate This is the kit I used to bolt up my 4L80E w/ stock 4L80E converter to my LQ9. http://paceperformance.com/i-5146385...converter.html

04-22-2016, 05:10 PM	#10
65standard Registered User Join Date: Dec 2014 Location: Coal City, IL Posts: 695	Re: LQ 9 4L80 flexplate My LQ4 has a flat flex plate and no spacer with the 4L80 trans. What is different with the LQ9? __________________ Tony Nicholas @ Midwest Metal Masters 1953 Chevy 3100 392 Hemi w/727 & 9” Ford 1985 Chevy C/10 6.0L 4L80 373 locker

04-22-2016, 10:49 PM	#12
Robznob11 Registered User Join Date: Feb 2004 Location: brownfield texas (west texas) Posts: 1,936	Re: LQ 9 4L80 flexplate This is what the correct flex plate should look like. Attached Images __________________ The Ghost 67 short wide full custom. 550 hp LSX, 4l80E, narrowed 9". Body dropped w/air ride! ........................ ___ .........________//__{\_____ ,,,,,,,/__(⊙)___//___/__(O)_/ @disciple2.rc 💪instagram💪 LED TAILS

04-23-2016, 10:59 PM	#13
gpat@earthlink.net Active Member Join Date: Jan 2011 Location: columbia, SC Posts: 156	Re: LQ 9 4L80 flexplate Thanks for all the information. I believe I have have completed the task.



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