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08-20-2014, 01:37 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: Valley Center,CA
Posts: 89
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LS1 with 4.11 gears
Just got done with my LS1 swap 4L60E ,28 inch tires,its got 3.08s gear right now and getting ready to stick 4.11s in it .. Im in SoCal and drive up a pretty substantial hill to get to my house and plan on putting a hitch on it for the occasional tow. From what I gather out here the gear of choice is 3.73..Do you think I will regret it??,,,,thanks jim
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1971 Chevy C-10, 5.3, 4L60E,4.10 gears UNDER CONSTRUCTION Mid size bed conversion https://picasaweb.google.com/1114721...yC10MidSizeBed The basic buildup https://picasaweb.google.com/1114721...3/1971ChevyC10 |
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08-20-2014, 02:45 PM
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#2 |
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It's alsways something.....
 
Join Date: Nov 2008
Location: Douglasville GA
Posts: 1,171
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Re: LS1 with 4.11 gears
One of my donor trucks was a LQ4 with 4l80 and it had 4:10 gears from the factory (2WD 2002 2500HD)
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1968 RS Camaro 'Vert Matching number 327 and M21 Muncie 1968 C10 Black with red interior and orig paint. 5.3 / 4l60e,3:73 POSI 17" Torq Thrusts 1968 CST 514 Red with black interior. Buddy Buckets, Factory A/C, PS, PB- 20" AR custom shop TT, 5.3 and 4l60e |
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08-20-2014, 03:32 PM
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#3 |
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Registered User
Join Date: Dec 2011
Location: winnipeg
Posts: 1,107
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Re: LS1 with 4.11 gears
Personally with a 4le trans I'd go with the 3.73. These trucks are far lighter then the donors ls engines come out of,3.73 should be plenty of gear and make for a better highway cruiser.
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08-21-2014, 12:17 AM
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#4 |
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Registered User
Join Date: Jan 2010
Location: Loveland, CO
Posts: 1,921
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Re: LS1 with 4.11 gears
My '71 that I LS swapped has a 3.73 rear w/ 29" tires and its pretty much perfect for the setup. I'd think 4.11 is too much.
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Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB |
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08-21-2014, 01:40 AM
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#5 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: LS1 with 4.11 gears
I just had the 6.0 LQ4 with 4l80e auto installed back in Jan. The rear end gear is factory 4:10's and I like it. I could go a little less I'm sure but with the weight of these old trucks I'll stay right where I'm at. I don't get the best gas milage but at 17.5MPG I'm ok with it since I didn't buy the truck for gas milage anyway!
The take off is great and it doesn't cruise bad at all only 2200RPM's at 65-70 MPH. If I do anything else it will be to add the new 6 speed automatic later to help on gas. 
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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. |
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08-21-2014, 07:17 AM
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#6 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: LS1 with 4.11 gears
You'll find 4.10s came in 2500/3500s with taller tires. I would want 3.73s for your lighter truck with shorter tires. I have hauled many serious loads with 3.73s. I never felt I had the wrong ratio
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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08-21-2014, 09:27 AM
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#7 |
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Registered User
Join Date: Nov 2001
Location: Springfield, MO
Posts: 2,939
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Re: LS1 with 4.11 gears
I will vote for 3.73 also, I used that for several years and was a great combo. I did swap to a t56 and did swap to the 4.11 at that time because of the double overdrive.
the 4l60 has a very low first gear so with the lower gearing you will find first is a very short gear for you. doing the quick calculation for the upper end it probably is about a wash. at 70 the 4.11 gears will cruise at 2400, the 3.73 will net you 2200. Not much difference.
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Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!" |
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08-21-2014, 06:25 PM
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#8 |
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*************
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,858
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Re: LS1 with 4.11 gears
3.73s....
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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