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06-26-2025, 07:45 PM
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#1 |
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Registered User
Join Date: Aug 2008
Location: greensboro nc
Posts: 895
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4L80E transmission in 1969 c10
Thinking about sticking a 4L80E transmission into my 69 Panel truck and since most everything is same as gtruck and nobody answered in Panel section/
Wondering and taking lazy route, Will it fit w/o tunnel haing to be cut and enlarged. Know driveshaft will be cut. Haver to build crossmembers to tailshaft mount. That all easy enough and since cutting hell out of everything else to repair rust crap. Cutting tunnel probably just another job. Just like to haver parts on hand and frteady to go in before ci=utting into it. Fit as is or brake put the saw all?
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Only the stupid know too much to learn something new. |
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06-27-2025, 10:48 AM
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#2 |
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Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,260
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Re: 4L80E transmission in 1969 c10
What was the original engine and transmission?
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'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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06-27-2025, 01:34 PM
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#3 |
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Registered User
Join Date: Aug 2008
Location: greensboro nc
Posts: 895
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Re: 4L80E transmission in 1969 c10
396 with 3 on the tree.
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Only the stupid know too much to learn something new. |
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06-27-2025, 05:34 PM
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#4 |
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Registered User
Join Date: Jun 2025
Location: Statesville, NC
Posts: 13
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Re: 4L80E transmission in 1969 c10
I just recently purchased my 72 C-10 that has a 350 with a 4L80 and as far as I know it wasn't cut. (Haven't seen any indication myself) The truck originally had a 292 but not sure of the tranny. Now it's a floor shift with tilt steering.
Good Luck! |
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06-27-2025, 07:10 PM
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#5 |
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Senior Member
 
Join Date: Apr 2006
Location: Yuba City, Ca
Posts: 2,041
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Re: 4L80E transmission in 1969 c10
I installed a 4l80 in my blazer. It’s 4wd but I simply moved the engine forward. You may be able to do the same. All my stock drivelines fit.
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Kirk 72 Blazer CST 4wd highlander |
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06-28-2025, 10:10 AM
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#6 | |
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Registered User
Join Date: Aug 2008
Location: greensboro nc
Posts: 895
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Re: 4L80E transmission in 1969 c10
Quote:
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Only the stupid know too much to learn something new. |
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06-28-2025, 04:45 PM
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#7 |
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State of Confusion!
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 48,486
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Re: 4L80E transmission in 1969 c10
You'll need a computer for the 4l80e. Means, if you don't want to deal with the computer, use a 4l80/700R4 for you overdrive tranny.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 06-28-2025 at 10:09 PM. |
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06-28-2025, 05:08 PM
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#8 |
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At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,448
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Re: 4L80E transmission in 1969 c10
Put a 4L80 in my 73 best thing I've done.
Hgm electronics controller Control shift time/firmness/lockup from your phone via Bluetooth
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" That didnt make it any newer " " Dont antique the equipment " |
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06-30-2025, 02:12 PM
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#9 |
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Registered User
Join Date: Aug 2020
Location: Salmon Arm BC
Posts: 282
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Re: 4L80E transmission in 1969 c10
My understanding is that the 4l80e fits under the high hump trucks that came with 4spds or TH400. The low hump trucks it fits better if you cut and install the high hump.
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1970 C10 l/b 292/4spd Build: http://67-72chevytrucks.com/vboard/s...d.php?t=811062 |
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