6.0l LQ4 to old school tranny - The 1947 - Present Chevrolet & GMC Truck Message Board Network

softballnrd27 · 03-28-2011, 01:54 AM

I want to make sure I have this right:
2004 LQ4(not sure what trans was behind it, I forgot to ask) I am posting a pic so that maybe it will help with what I need to know:

I need to adapt my th350 to the 6.0 If it did in fact come with a 4l80e then I should be good as far as spacer and bolts correct? If not then I need to get the spacer and bolts correct? Then I need the flat flexplate and drill holes for the th350 TC? When I go to mark the holes in order to drill new ones, does it matter where on the flexpalte they are drilled? Should there be a certain distance from the factory holes?

softballnrd27 · 03-28-2011, 03:56 AM

For the VSS will this one work with the stock computer? I am going to run Autometer procomp gauges and this is the recommended one for GM.
http://www.summitracing.com/parts/ATM-5291/

Shon · 03-28-2011, 09:25 AM

Need to determine what flexplate is on the motor. if it has a spacer already then you will just have to drill holes for the TC. If it doesnt have a spacer then you will want a crank spacer.

link to just the spacer pictured above

If you want all new stuff I ship these out:
TCI Flexplate and spacer

softballnrd27 · 03-28-2011, 12:02 PM

How much for that kit? I am guessing it is already drilled for th350 pattern.

softballnrd27 · 03-28-2011, 12:07 PM

I guess i could have just clicked on the link.

shortbed70 · 03-28-2011, 03:42 PM

Do these flexplates work with 700's and th 400's also?
Posted via Mobile Device

Shon · 03-28-2011, 03:45 PM

We use them on TH350/400s and I dont see why they would not work with a 700R4, the bolt pattern for the TC is the same.

jkade · 03-29-2011, 10:53 AM

http://www.gmpartsdirect.com/

GM PART # 12621399 $44.42

That has the flexplate, spacer, and bolts. All you will have to do is do a little grinding with a die grinder on the new flexplate to match you converter. The bolt holes are close but you have to open them up a little. Working fine on my LQ9/th400 and you won't beat the price!!!

You can see here what I am talking about.

Shon · 03-29-2011, 10:59 AM

How much is shipping from there? LOL
If you want that set up let me know, I will see if I can ship it to you cheaper than GMPD.

jkade · 03-29-2011, 12:20 PM

Quote:

Originally Posted by Shon

How much is shipping from there? LOL
If you want that set up let me know, I will see if I can ship it to you cheaper than GMPD.

It was around $10 for shipping. Heck of a deal for plate, spacer, and bolts IMO since most places want that for just the spacer.

67shortie · 03-29-2011, 02:43 PM

My engine came off of a 4L80 so the flexplate had the correct adapter already there so all I had to do is elongate the converter holes to mount the 700 to it.

clinebarger · 03-29-2011, 03:08 PM

Quote:

Originally Posted by 67shortie

My engine came off of a 4L80 so the flexplate had the correct adapter already there so all I had to do is elongate the converter holes to mount the 700 to it.

You should not have to mess with the converter bolt holes on a "4L80E" flexplate

Quote:

Originally Posted by jkade

GM PART # 12621399 $44.42

That has the flexplate, spacer, and bolts. All you will have to do is do a little grinding with a die grinder on the new flexplate to match you converter. The bolt holes are close but you have to open them up a little. Working fine on my LQ9/th400 and you won't beat the price!!!

Is that what you got from GM parts direct? If so, Its wrong, Looks like a 4L60E flexplate. It should look like this, Notice the 6 converter bolt holes.

clinebarger · 04-01-2011, 03:49 PM

I was wrong, You do have to open up the holes a little, I dont know why GM would change that on the 4L80E from the early ones.

jkade · 04-04-2011, 11:04 AM

Quote:

Originally Posted by clinebarger

You should not have to mess with the converter bolt holes on a "4L80E" flexplate

Is that what you got from GM parts direct? If so, Its wrong, Looks like a 4L60E flexplate. It should look like this, Notice the 6 converter bolt holes.

That was a flexplate I had laying around just to see how far the holes were off. I used the one in the kit. The one in the pic will work as it was a dished plate as well but I did not have the spacer.

jkade · 04-04-2011, 11:06 AM

Quote:

Originally Posted by clinebarger

I was wrong, You do have to open up the holes a little, I dont know why GM would change that on the 4L80E from the early ones.

The 6 bolt converter for the 6.2 matched the holes perfect.

Andyking1203 · 02-08-2019, 10:53 PM

Quote:

Originally Posted by Shon

Need to determine what flexplate is on the motor. if it has a spacer already then you will just have to drill holes for the TC. If it doesnt have a spacer then you will want a crank spacer.

link to just the spacer pictured above

If you want all new stuff I ship these out:
TCI Flexplate and spacer

Is the second link still available so many years later?

Shon · 02-09-2019, 08:35 AM

Quote:

Originally Posted by Andyking1203

Is the second link still available so many years later?

HerronPerformance is gone. Was mine that’s how I know. But the TCI spacer is still available from many places.
Posted via Mobile Device

BR3W CITY · 02-09-2019, 12:01 PM

^Holy crap dude I haven't seen your username here in a while!

03-28-2011, 01:54 AM	#1
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	6.0l LQ4 to old school tranny I want to make sure I have this right: 2004 LQ4(not sure what trans was behind it, I forgot to ask) I am posting a pic so that maybe it will help with what I need to know: I need to adapt my th350 to the 6.0 If it did in fact come with a 4l80e then I should be good as far as spacer and bolts correct? If not then I need to get the spacer and bolts correct? Then I need the flat flexplate and drill holes for the th350 TC? When I go to mark the holes in order to drill new ones, does it matter where on the flexpalte they are drilled? Should there be a certain distance from the factory holes? __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-28-2011, 03:56 AM	#2
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: 6.0l LQ4 to old school tranny For the VSS will this one work with the stock computer? I am going to run Autometer procomp gauges and this is the recommended one for GM. http://www.summitracing.com/parts/ATM-5291/ __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-28-2011, 09:25 AM	#3
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 6.0l LQ4 to old school tranny Need to determine what flexplate is on the motor. if it has a spacer already then you will just have to drill holes for the TC. If it doesnt have a spacer then you will want a crank spacer. link to just the spacer pictured above If you want all new stuff I ship these out: TCI Flexplate and spacer __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

03-28-2011, 12:02 PM	#4
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: 6.0l LQ4 to old school tranny How much for that kit? I am guessing it is already drilled for th350 pattern. __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-28-2011, 12:07 PM	#5
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: 6.0l LQ4 to old school tranny I guess i could have just clicked on the link. __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

03-28-2011, 03:42 PM	#6
shortbed70 Registered User Join Date: Mar 2002 Location: Forney TX Posts: 4,512	Re: 6.0l LQ4 to old school tranny Do these flexplates work with 700's and th 400's also? Posted via Mobile Device __________________ Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274

03-28-2011, 03:45 PM	#7
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 6.0l LQ4 to old school tranny We use them on TH350/400s and I dont see why they would not work with a 700R4, the bolt pattern for the TC is the same. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

03-29-2011, 10:53 AM	#8
jkade Senior Member Join Date: Nov 2005 Location: AL Posts: 2,517	Re: 6.0l LQ4 to old school tranny http://www.gmpartsdirect.com/ GM PART # 12621399 $44.42 That has the flexplate, spacer, and bolts. All you will have to do is do a little grinding with a die grinder on the new flexplate to match you converter. The bolt holes are close but you have to open them up a little. Working fine on my LQ9/th400 and you won't beat the price!!! You can see here what I am talking about. Last edited by jkade; 03-29-2011 at 10:54 AM.

03-29-2011, 10:59 AM	#9
Shon Registered User Join Date: Sep 2005 Location: sc Posts: 1,203	Re: 6.0l LQ4 to old school tranny How much is shipping from there? LOL If you want that set up let me know, I will see if I can ship it to you cheaper than GMPD. __________________ 71 Cheyenne C10 LWB cam'd 6.0/T56 Swap

03-29-2011, 02:43 PM	#11
67shortie Green club Join Date: May 2002 Location: Central CA Posts: 1,059	Re: 6.0l LQ4 to old school tranny My engine came off of a 4L80 so the flexplate had the correct adapter already there so all I had to do is elongate the converter holes to mount the 700 to it. __________________ 71 short/fleet ECE 4/6 drop, LQ4/700r4/3.42 gears 70 SS396 Chevelle 427/200-4R/3.73posi 61 Lincoln Continental, black on black Son you are going to drive me to drinkin if you don't stop drivin that hot rod lincoln

04-01-2011, 03:49 PM	#13
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: 6.0l LQ4 to old school tranny I was wrong, You do have to open up the holes a little, I dont know why GM would change that on the 4L80E from the early ones.

02-09-2019, 12:01 PM	#18
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 6.0l LQ4 to old school tranny ^Holy crap dude I haven't seen your username here in a while! __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

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