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Old Nov 28, 2002 | 11:52 PM
  #1  
dustinleavitt2000's Avatar
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really weird question

I have a rather bazaar question for all of you out there that like to mis match stuff.

I was listening to someone talking how the old buses with the 460's and 429's had a two speed rear differential at least i think thats what its called. Would it be possible to put a two speed differential with some fabrication and some redneck engineering into my 1977 ranchero with a C6 transmission?
 
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Old Nov 30, 2002 | 07:12 PM
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really weird question

Anything is possible... you'll have to have it narrowed to fit within the wheelwells. And you'll have to move the spring perches in some, But I don't see any real problems with your modification.

I have to ask why are you putting a 5 ton rearend in a 1/4 ton truck.

 
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Old Nov 30, 2002 | 11:46 PM
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really weird question

my aim is to get better gas mileage with a two speed differential did any other vehicles have one?

Or am I wasting my time.
 
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Old Dec 1, 2002 | 12:45 AM
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I think for the amount of hassle and expense, you would do better with an overdrive on the trans. The bus axle is very heavy.

Other than narrowing the housing, shortening, resplining the axles, and relocating spring perches, u-joints could be incompatable, brake lines, E-brake cables, wheel bolt patterns, wheel diameters and how to wire the overdrive feature are things you should work out before you start.
 
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Old Dec 1, 2002 | 04:31 PM
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really weird question

Where would I find an overdrive transmission that fits my truck? currently i have a c6 transmission. are there any other modifications i could make for good milage?
 
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Old Dec 1, 2002 | 07:54 PM
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really weird question

Off the top of my head, check out GearVendors.
http://www.gearvendors.com/f2wd3s.html

Some companies also make adapter plates for the block that allow several factory 4 speed autos, like the Ford Aod to bolt up. You can also get them for GM overdrives.
 
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Old Dec 1, 2002 | 11:44 PM
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Get with Art Carr, TCI, Lentech and GER for adapters to mate transmissions like the AOD or GM's TH200 and TH700 overdrive trans to various motors. The AOD will actually bolt directly to the 351C however as it has the same bellhousing bolt pattern as the 5.0L. The correct 28 oz balance factor flexplate you'd need is available from various trans outlets, plus Jeg's and Summit.
 
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Old Dec 2, 2002 | 09:43 AM
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The bus stuff would be real heavy. Gear Vendors works great but not cheap.
 
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Old Dec 4, 2002 | 10:59 PM
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really weird question

did they make a c6 over drive tranny?


 
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Old Dec 4, 2002 | 11:08 PM
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From: Fairmont
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One of my Dad's old Farm magazine had a guy who put another manual
transmisson behind the first.

In fact he installed the second trans backwards,(I think it was a 3 speed)so 3rd was straight thru, 2nd was overdrive and 1st was super overdrive.

I always wanted to try that. I wonder how the second trans oiled its self rotating backwards?


 
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Old Dec 5, 2002 | 12:40 AM
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The E4OD is basically a C6 with overdrive but it's a bigger trans. It was only offered in E & F series. I don't know how much a passenger car trans tunnel would need to be modified for one to fit.

http://www.baumannengineering.com/pguide.htm
 
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Old Dec 5, 2002 | 10:37 AM
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I saw a chart a while back and it illustrated the cost savings of more miles per gallon. Basically you'd need to drive tens of thousands of miles to save a nickel on these overdrive conversions. Leave it be. Run it hard! Save your money for the good stuff, like beer.
William in Atlanta
 
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Old Dec 6, 2002 | 12:00 AM
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really weird question

I have to go along with William about the gas mileage issue if that's the only criteria.

From a performance standpoint, the E4OD has a lower 1st gear ratio, (fits a C6 too), and the OD makes a set of low axle gears a lot easier to live with.


 
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Old Dec 21, 2002 | 01:37 AM
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that would be sweet
 
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Old Dec 21, 2002 | 03:37 AM
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From: Jax FL
really weird question

 
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