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03-23-2016, 07:17 PM
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#1 |
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Registered User
Join Date: Dec 2015
Location: Las Vegas, Nv.
Posts: 12
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6L80 transmission in a 71 C10
Howdy. Will a 6L80 transmission fit in a 71 C10 or will the trans hump have to be modified? Any info appreciated!
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03-23-2016, 07:53 PM
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#2 |
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Registered User
Join Date: Jan 2010
Location: Katy Texas
Posts: 501
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Re: 6L80 transmission in a 71 C10
I've got one in mine, with the small hump floor. It takes a little modification. I raised the tunnel up an inch higher and now it clears. With a high hump you'd have no issues.
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 c10clubtexas
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03-23-2016, 08:18 PM
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#3 |
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Registered User
Join Date: Dec 2015
Location: Las Vegas, Nv.
Posts: 12
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Re: 6L80 transmission in a 71 C10
Mine is a 2 wheel drive so I'm guessing I have low hump. But I don't mind modifying it. Thanks for the info!
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03-23-2016, 11:55 PM
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#4 |
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Registered User
 
Join Date: Oct 2004
Location: Milwaukee, WI
Posts: 403
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Re: 6L80 transmission in a 71 C10
You can have a 2 wheel drive and have a high hump trans cover. My 69 Burb is a 2 wheel drive and has a high hump. The trans in the picture is the stock 4-speed. The option code for the trans is M20. I think it just matters what trans came stock in the truck.
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Steven 69 Chevy C10 Suburban 350 700R4 w/Disc brakes on all four corners 2017 50th Anniversary Camaro SS 2004 Chevy Impala LS 2016 Chevy Malibu LT |
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03-24-2016, 01:15 AM
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#5 |
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Registered User
Join Date: Sep 2013
Location: Houston, TX
Posts: 80
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Re: 6L80 transmission in a 71 C10
I have a 6L80 in my truck with a high hump and everything cleared. You'll need to make a custom linkage to connect the shift lever on the steering column to the lever on the transmission, I used one from Lokar and bent it to fit.
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1972 C10 LWB Highlander Dark Olive/White - Work in progress 5.3/6L80e, Accuair e-level, Porterbuilt Stage 1 front and Stage 2 rear, Wilwood 14"F 13"R, Vintage Wheel Works V40 18x8/18x11, and more... Build Thread |
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03-24-2016, 09:16 AM
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#6 |
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Registered User
Join Date: Jan 2010
Location: Katy Texas
Posts: 501
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Re: 6L80 transmission in a 71 C10
thats surprising that you had to bend your lokar linkage, mine lined up beautifully! I did modify the arm to bolts to the transmission though moving it more to a 9 o'clock position.
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c10clubtexas
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03-24-2016, 09:18 AM
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#7 |
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Registered User
Join Date: Jan 2010
Location: Katy Texas
Posts: 501
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Re: 6L80 transmission in a 71 C10
best thing about the 6l80 is when I'm cruising at 80 and the rpms are at 2000. just changed gears to 4:11 now but I'm expecting to be 80 at 2300
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c10clubtexas
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03-24-2016, 12:58 PM
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#8 | |
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Registered User
Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: 6L80 transmission in a 71 C10
Quote:
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1968 LWB C20 / AC / Wood Bed |
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03-24-2016, 05:02 PM
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#9 |
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Registered User
Join Date: Dec 2015
Location: Las Vegas, Nv.
Posts: 12
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Re: 6L80 transmission in a 71 C10
Stock, my 71 C10 Longbed had a 350 engine with a Turbo 350 transmission. It has a 92 TPI engine with a 700r4. It's been in there for bout 20 years. Was thinking of picking up a low milage L92 or LS3 and swapping it out. I like the idea of the 6 speed trans. When I get it back from the rear end shop, I'll have to check the hump...
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03-24-2016, 07:59 PM
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#10 |
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Registered User
Join Date: Jan 2010
Location: Katy Texas
Posts: 501
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Re: 6L80 transmission in a 71 C10
I did notch my crossmember, however that was to fit the enormous oilpan on the gen v engines. this sucker holds 8 quarts
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