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www.ColoradoClassicBroncos.com - View topic - opinions??
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Reply to topic  [ 6 posts ] 
 opinions?? 
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Joined: Tue Oct 05, 2010 10:17 pm
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Post opinions??
I have a 5.0 efi, C4 marlin crawler-d 20 combo w/ 4.56 gears in back and 4.11 up front. Haven't wheeled yet.

My question is would you keep the 4.56's and mate the 44 or drop the rear to 4.11's. I am looking at moderate wheeling, more pavement.
I am thinking the rear, as to lower some rpm's on the highway, and w/ the crawler I should still be able to get a lower ratio when off road.
What do you guys think??

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Wed Nov 24, 2010 3:13 pm
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Post Re: opinions??
What size tires are you planning to run and what kind of fuel economy (oxymoron in this case, I know) are you hoping to achieve?

Initial instinct on my part is to drop the rear to 4.11s. Much more highway/street friendly than the 4.56. I'm not familiar with the Marlin set up, but if it is designed as a low range upgrade/psuedo doubler then I would say you should survive quite well in your limited wheeling.

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1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

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1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Wed Nov 24, 2010 3:24 pm
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Post Re: opinions??
33's, thats what I am going to do, just needed help getting pushed off the cliff if you will!

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Thu Nov 25, 2010 12:07 am
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Post Re: opinions??
I would go with the 4.10's. Thats whats in mine with 33's and it turns right around 2800-3000 at 60-65. I dont like spinning it that high for very long on the highway so I usually dont go much faster than 55. banghead

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74 Ranger EFI351w, 4r70w, ARB 5.13 9in, ARB 5.13D44, and a bunch of other goodies. Best of all the family memories.

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Thu Nov 25, 2010 8:39 am
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Post Re: opinions??
Definitely 4.11 with the 33's. You have all the low gears you'll ever need already.


Thu Nov 25, 2010 11:01 am
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Post Re: opinions??
Plumbdoctor, if you end up going w/4.11's I'd be interested in your 9 in 4.56's if they are in good condition. I run 4.11's w/33's and in 4 low I've never had a problem off road, on road in 4 hi i don't mind running it at 3k plus for 1-2 hrs to get somewhere, around town driving it is a great gear setup.

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Thu Nov 25, 2010 8:42 pm
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