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03-10-2014, 11:23 PM
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#1 |
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Registered User
Join Date: Feb 2014
Location: Phoenix, AZ
Posts: 60
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Best Transmission???
Planning the build of a 72 C/10 with a built LS3 and was trying to decide which transmission to go with, the 4L60, 4L80, or maybe the 6L80/90. Any opinions are welcomed.. Thanks
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03-11-2014, 12:10 AM
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#2 |
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Chance
 
Join Date: Sep 2001
Location: Belcourt ,ND, USA
Posts: 750
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Re: Best Transmission???
Th400
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1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400 |
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03-11-2014, 12:38 AM
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#3 |
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Registered User
Join Date: Jul 2013
Location: Forestburg, Texas
Posts: 659
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Re: Best Transmission???
For the OD on a LS engine... if money was not a concern then one of the new 6 speed autos
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Mark Jesus is the Way! 2003 2500HD CCLB Duramax/Ali (Clifford) 2014 2SS/RS black on black Camaro (Betty) 2006 Pontiac SOLSTICE silver/black (Lula-Bell) 1970 C/10 Short Wide (Peggy) 1964 C/10 Short Step (Hambone) RIP Jimmy Hamilton Thank you for the trucks |
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03-11-2014, 03:23 AM
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#4 |
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Senior Member
Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: Best Transmission???
350 Turbo..."Everything else is just a transmission" <---<< Just kidding...Dont know nuthin about the late model stuff
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American" 
Last edited by Ironangel; 03-11-2014 at 10:25 AM. |
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03-11-2014, 03:31 AM
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#5 |
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Registered User
Join Date: Mar 2012
Location: Crestline, CA
Posts: 225
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Re: Best Transmission???
6L80/90
If money is no object. Overdrive will save you some gas. |
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03-11-2014, 08:24 AM
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#6 |
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Registered User
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Best Transmission???
With the 4l80 , and 6l80 , I believe you will need some transmission tunnel modification .If that does not bother you Id do the 6l80 , more gears-more fun , and driveability , I hope you have atleast a 3.73 rear gear . 4l60 should be relatively easy to drop in . I think with all or at least the two 80 series transmissions , you will need driveshaft modification
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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03-11-2014, 08:27 AM
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#7 |
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Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: Best Transmission???
Built 200R4 from a Turbo Buick
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Chevy GMC Trucks Find Of The Day https://www.facebook.com/ChevyGmcTrucksFindOfTheDay or http://ChevyGMCTrucks.com |
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03-11-2014, 10:17 AM
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#8 |
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Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,165
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Re: Best Transmission???
If the man is building a modern fuel injected engine, why would you steer him to old school TH350, TH400, or 200R4 that won't really bolt up?
If you are making serious power, then I would say 4L80. If you can afford even more modern, a 6L80 would be nice. No experience with the 6L80, but the 4L80 is a pretty tough piece.
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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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03-11-2014, 10:24 AM
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#9 |
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Registered User
Join Date: Jun 2012
Location: Pittsgrove, NJ
Posts: 1,502
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Re: Best Transmission???
Didn't need to modify my tunnel for the 4l80. I've heard the 6L80 won't handle as much power, but that was quite a while ago. I imagine by now there are upgrade kits that can handle just as much power but I'm sure they cost much more $$$$. If it's going to be built I'd avoid the 4l60.
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Will 1968 C10 - Project Texa Go 6.0/4L80e 2003 Mitsubishi Lancer Evolution 2002 Ford Excursion 7.3L 2024 Toyota Sienna |
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03-11-2014, 10:39 AM
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#10 |
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Registered User
Join Date: Dec 2008
Location: NW-Ohio
Posts: 2,525
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Re: Best Transmission???
you can bolt anything to anything with an adapter plate, around $100 usually.
don't let a bolt pattern stop you from your dreams, move the bolts; not your vision.
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Chevy GMC Trucks Find Of The Day https://www.facebook.com/ChevyGmcTrucksFindOfTheDay or http://ChevyGMCTrucks.com |
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03-11-2014, 12:00 PM
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#11 |
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Registered User
Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Best Transmission???
You can bolt any 350-400-2oo4r-700r4 to an ls3 there are converter and flexplate issues ,but they are small , .4 of an inch to be exact , no adapter plates needed . the ls3 engine is missing a threaded hole on the top passenger side , and its not necessary , 5 other bolts will hold it .
changing to an overdrive transmission is a great upgrade , as is the ls engine , hey it wont leak  , along with the increased cruising speed you will be getting , Id defiantly upgrade the braking system , especialy if you have 4 drum manual brakes now , minimal front disc power , 4 disc even better , my 68 is running an ly6 ls motor with a turbo 350 behind it , probaly swaping in a 2004r soon for highway cruisingI see you mention "BUILT LS3 " Thats over 500 horse easy , please go for a quality 4 disc power system , hydroboost highly recommended
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive Last edited by 67 chevelle; 03-11-2014 at 12:05 PM. |
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