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Torque Converter-lockup?

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Old Dec 22, 2003 | 07:05 AM
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mustangman65_79
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Torque Converter-lockup?

I've been thinking of ways to improve my gas mileage on my '89 Bronco. 8Mpg kinda sucks after a while, when it's your everyday driver. So would a luck-up torque converter help with this, or will it cause new problems?

'89 Bronco, 351 c6 33" superswampers. Full lenth headers, true dual sidepipes, K&N filter, a little over 3,000 miles on motor.
 
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Old Dec 22, 2003 | 07:45 PM
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89 Bronc probably has an E4OD tranny that already locks up the converter (to a point) by itself. Havent thought about trying this, but it seems to me that this might cause some probs, puter related and all. Just a though though, good luck
 
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Old Dec 22, 2003 | 08:00 PM
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8 mpg is a little low, even for a Bronc. There may be another problem.
 
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Old Dec 22, 2003 | 09:00 PM
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From: Spokane WA
8mpg is NOT normal

granted, my bronco is a 302 (600cfm 4 barrel) and is running 32" tires with 3:55 gears but I'm getting 14mpg in 2wd around town.
I'm also running a C6
 
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Old Dec 22, 2003 | 11:08 PM
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I thought '89 was a little pre lock-up torque converters in terms of stock configurations and as for putting one in I have an '86 Chevy beater that had a lock-up torque converter installed and boosted mpg's a whopping 3 miles on the highway. It does add up though not sure what went into putting that in though previous owner did it. Give it a whirl and let us know how it goes.
 
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Old Dec 22, 2003 | 11:27 PM
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I'm getting 14 with my 32s 3.55 gears and AOD around town. So I would figure out whats going on before doing mods.
 
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Old Dec 23, 2003 | 10:05 AM
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No, it is a 3-speed C6, 8 mpg is city, well going back and forth to work, I don't know what it is for highway. As for other problems, there shoudn't be anything. 12 is the rated highway mileage for it back in '89. I still have the window sticker.
 
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Old Dec 25, 2003 | 09:34 PM
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if it's a c6, go for it. Probably help on the highway, mostly. Good luck
 
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Old Dec 26, 2003 | 01:08 AM
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From: Myrtle Point, Or
it wouldn't cause any unknown problems hu?

Well,I might give it a try then, what ahout 4wheeling, or towing?
 
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Old Dec 31, 2003 | 07:16 PM
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I cant think of any puter problems since the engine is the only thing the puter is futzing with. Only thing to think about off road is that locking up the converter gets rid of the gear reduction it gives you and may be a problem in the mud, just depends on what kind of power you're making and where. Porbably work good for towing though, by the time it locks up you should be making plenty of juice, and you'll get better mileage. Godd luck.
 
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Old Dec 31, 2003 | 08:04 PM
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If you put one in it will have to on a toggle switch. I had a switch to lock up my converter on a diesel that I had. If I didn't turn the switch off it would act like the trans was going nuts when stopping and starting off. The converter should only be locked up in 3rd gear.
 
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Old Jan 1, 2004 | 01:31 AM
  #12  
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How does this switch work, when my trans is controled by Vaccuum?
 
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Old Jan 1, 2004 | 02:33 AM
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In my '86 it acts like something of an overdrive that will only kick in in third gear. You can feel it come on and there is no switch to engage it. I thought it was something of a fluidity thing that engaged through laws of fluid motion????
 
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Old Jan 1, 2004 | 03:48 AM
  #14  
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SO it's only in third gear, and doesn't ingage any other time? What speed?
 
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Old Jan 1, 2004 | 01:36 PM
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http://www.technicalevolution.com/tcc.htm - This website gives a little insight into what a lock-up torque converter is/does.
 
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