LQ9 with early 4L80e - The 1947 - Present Chevrolet & GMC Truck Message Board Network

'67Nate · 01-21-2014, 03:22 AM

I have an LQ9 out of an '04 SS Silverado that I plan to start gathering pieces for to install into my '67 C10 soon. I was just given a working trans (4L80e) but it's an early version from '93. I see I will be missing the top (center) and right bell housing bolt if I were to try to use this… Will this work? and if so what else am I looking at needed to combine the two? Thanks for any input guys!

**truckdude239** · 01-21-2014, 10:48 AM

dont need top bolt i dont know about other stuff

BR3W CITY · 01-21-2014, 07:47 PM

The top bolt thing is fine. The early 80s are a tad different in that 91-96 are essentially the same, but the 91-93 have a crap electrical connector where the harness passes through the case. You'd want a new harness anyway sine your running a different setup, so with a little heads up on the wiring, you should be able to use it no problem.

There are actually a bunch of other internal differences in the lubrications, the # of teeth on the sprag, and the way the cooler lines attach.

'67Nate · 01-22-2014, 01:54 AM

Thanks for the help guys. So as far as torque converters and flex plates, what kind of recommendations do you have? Factory 4L80e stuff bolts right up? I read somewhere about spacers etc. are needed on some applications, but it was about as clear as mud to me.
Again, new to this LS world, but so far this forum is a life saver!

Andy4639 · 01-22-2014, 02:58 AM

I'm learning to but I think the spacers are for the 700r4 stuff are other older trans like the 350 turbo are 400.
My 6.0 came with a 4l80e attached so I'm good.

BR3W CITY · 01-22-2014, 08:03 PM

Quote:

Originally Posted by Andy4639

I'm learning to but I think the spacers are for the 700r4 stuff are other older trans like the 350 turbo are 400.
My 6.0 came with a 4l80e attached so I'm good.

The spacing on the flywheel is different when attaching a 4l80e to a few different things. The early 6.o only came with a 4l80e and had the spacer built in, and its difficult to retro-convert to use anything besides the 80e. The smaller cube truck engines that came with the 60e's can run a small spacer or switch out to the lq4 style flywheel.
The 80e uses more bolts on the tq converter, which seems so much more robust than the ls-car style converters.

'67Nate · 01-23-2014, 02:04 AM

So the sum of it all… My LQ9 will bolt right up to the '93 4L80e with factory TQ converter and flex plate. I'll have to rewire the trans with the newer (better) style harness and don't stress over the top center and right side bell housing bolts missing. If that's the case, the trans is headed to the shop to be gone through! Thanks guys.

Andy4639 · 01-23-2014, 02:11 AM

'67Nate,
That's how I see it!

Ok, That's what I was thinking since mine has the 4l80e already hooked up. Didn't realize it had a spacer in it though. I had read that the 700r4 and others would work with spacers just didn't realize it was only for the 4l60!
PS I did state I was learning to!

BR3W CITY · 01-23-2014, 03:33 AM

Quote:

Originally Posted by Andy4639

'67Nate,
That's how I see it!

Ok, That's what I was thinking since mine has the 4l80e already hooked up. Didn't realize it had a spacer in it though. I had read that the 700r4 and others would work with spacers just didn't realize it was only for the 4l60!
PS I did state I was learning to!

Andy, what applies to the 4l60e applies to the 700r4 too.

Andy4639 · 01-23-2014, 04:22 AM

Quote:

Originally Posted by BR3W CITY

Andy, what applies to the 4l60e applies to the 700r4 too.

Thanks!

clinebarger · 01-26-2014, 07:28 PM

The EPC (Electronic Pressure Control Solenoid) In a '91-'93 4L80E is NOT compatible with LS electronics. A '94-'03 EPC part# 24209276 is the one you need, Bolt-in deal.

The original '91-'93 internal harness is NOT compatible either, Again a '94-'03 harness will work, Part# 24200161.
A lot of the early 4L80E's have already been updated with a harness. But check to be sure. The early harness has a threaded hole in the middle of the connector, The late harness does not.

ls1nova71 · 01-23-2014, 04:20 AM

Quote:

Originally Posted by '67Nate

So the sum of it all… My LQ9 will bolt right up to the '93 4L80e with factory TQ converter and flex plate. I'll have to rewire the trans with the newer (better) style harness and don't stress over the top center and right side bell housing bolts missing. If that's the case, the trans is headed to the shop to be gone through! Thanks guys.

The flexplate on your LQ9 will be for a 4l60e (4l65e). You'll need one for a 4l80e.

BR3W CITY · 01-27-2014, 03:27 AM

Good post Cline, I was always told to change that stuff together, tho I didn't know it physically wouldn't work without doing so.

'67Nate · 01-28-2014, 05:25 AM

Great info and thanks!

01-21-2014, 03:22 AM	#1
'67Nate Registered User Join Date: Jan 2007 Location: Nor-Cal Posts: 18	LQ9 with early 4L80e I have an LQ9 out of an '04 SS Silverado that I plan to start gathering pieces for to install into my '67 C10 soon. I was just given a working trans (4L80e) but it's an early version from '93. I see I will be missing the top (center) and right bell housing bolt if I were to try to use this… Will this work? and if so what else am I looking at needed to combine the two? Thanks for any input guys! __________________ If you can't drive safe... Drive fast.

01-21-2014, 10:48 AM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: LQ9 with early 4L80e dont need top bolt i dont know about other stuff __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-21-2014, 07:47 PM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LQ9 with early 4L80e The top bolt thing is fine. The early 80s are a tad different in that 91-96 are essentially the same, but the 91-93 have a crap electrical connector where the harness passes through the case. You'd want a new harness anyway sine your running a different setup, so with a little heads up on the wiring, you should be able to use it no problem. There are actually a bunch of other internal differences in the lubrications, the # of teeth on the sprag, and the way the cooler lines attach. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-22-2014, 01:54 AM	#4
'67Nate Registered User Join Date: Jan 2007 Location: Nor-Cal Posts: 18	Re: LQ9 with early 4L80e Thanks for the help guys. So as far as torque converters and flex plates, what kind of recommendations do you have? Factory 4L80e stuff bolts right up? I read somewhere about spacers etc. are needed on some applications, but it was about as clear as mud to me. Again, new to this LS world, but so far this forum is a life saver! __________________ If you can't drive safe... Drive fast.

01-22-2014, 02:58 AM	#5
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: LQ9 with early 4L80e I'm learning to but I think the spacers are for the 700r4 stuff are other older trans like the 350 turbo are 400. My 6.0 came with a 4l80e attached so I'm good. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

01-23-2014, 02:04 AM	#7
'67Nate Registered User Join Date: Jan 2007 Location: Nor-Cal Posts: 18	Re: LQ9 with early 4L80e So the sum of it all… My LQ9 will bolt right up to the '93 4L80e with factory TQ converter and flex plate. I'll have to rewire the trans with the newer (better) style harness and don't stress over the top center and right side bell housing bolts missing. If that's the case, the trans is headed to the shop to be gone through! Thanks guys. __________________ If you can't drive safe... Drive fast.

01-23-2014, 02:11 AM	#8
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: LQ9 with early 4L80e '67Nate, That's how I see it! Ok, That's what I was thinking since mine has the 4l80e already hooked up. Didn't realize it had a spacer in it though. I had read that the 700r4 and others would work with spacers just didn't realize it was only for the 4l60! PS I did state I was learning to! __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

01-26-2014, 07:28 PM	#11
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: LQ9 with early 4L80e The EPC (Electronic Pressure Control Solenoid) In a '91-'93 4L80E is NOT compatible with LS electronics. A '94-'03 EPC part# 24209276 is the one you need, Bolt-in deal. The original '91-'93 internal harness is NOT compatible either, Again a '94-'03 harness will work, Part# 24200161. A lot of the early 4L80E's have already been updated with a harness. But check to be sure. The early harness has a threaded hole in the middle of the connector, The late harness does not.

01-27-2014, 03:27 AM	#13
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: LQ9 with early 4L80e Good post Cline, I was always told to change that stuff together, tho I didn't know it physically wouldn't work without doing so. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

01-28-2014, 05:25 AM	#14
'67Nate Registered User Join Date: Jan 2007 Location: Nor-Cal Posts: 18	Re: LQ9 with early 4L80e Great info and thanks! __________________ If you can't drive safe... Drive fast.

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