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| Metro Trans Swap - Need Advise; 1994 Swift 5sp | |
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| Tweet Topic Started: Nov 27 2009, 09:02 AM (3,103 Views) | |
| nerys | Nov 29 2009, 09:13 PM Post #16 |
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Grr
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can I just GET the 3.52 final gear and install it in my xfi tranny when I rebuild it? ie this way I have the nice 1-4 gears but the really high 5th gear ? |
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| bogs | Nov 29 2009, 10:25 PM Post #17 |
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Duct tape heals all wounds
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I was wondering similarly, Nery, but more of a mix & match spreading of the gears so that the get up and go is still there from a stop, but the top end spread out more, say 4th and 5th. |
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| Woodie | Nov 30 2009, 07:21 AM Post #18 |
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Yes, that's the three cylinder "ear", you might need to tap the hole for the bolt threads, but the casting is there. The gears are the same in all transmissions, if you change the final drive ratio, you change all five gears. If you want to modify the spread between the individual gears, you're going to have to get custom gears made, probably thousands of dollars. |
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| nerys | Nov 30 2009, 11:03 PM Post #19 |
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Grr
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why can't you just change the 5th gear? they are not seperate things they are one "unit" or am I missing something ie I guess I don't really know whats going on inside the transmission :-) |
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| Murf 59 | Nov 30 2009, 11:48 PM Post #20 |
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The way they are changing the ratios, is the final drive. That will change all the rest of the ratios inside the box. And if my info is correct. The XFi ratio is the 3.79 to 1. Nerys. All the speed gears inside are all the same for the MV3 trans. There is a difference in the really early models. But they are not what you would want. The 1/2 syncs are smaller for their 1/2 gears. That means the braking action the sync provides is less than ours. All the early ones had real problems with to small of syncs. Each coast has a different supplier for the clutches. One that I have had luck with is LUC. But the Mullet has posted some of the other brands somewhere around here. Not sure where though |
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| Dallas | Dec 1 2009, 12:14 AM Post #21 |
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yeah, all the insides of the transmissions are the same. same build quality too (ie, the swift gt's dont have stronger gears, just the diff itself) and only on a few places did I read that there is a different GT transmission with different 1/2/3 gear that are closer together. though for what we are talking about in this thread, ALL gears are the same (xfi and all 3 and 4cyls). you have a choice between 3.52, 3.79, 4.11, 4.39 final drives. which from 4.39 to 3.52 is a huge difference, like 20%. 4000rpm becomes 3200 Edited by Dallas, Dec 1 2009, 12:15 AM.
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| Murf 59 | Dec 1 2009, 12:17 AM Post #22 |
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That is a big jump. One is for hiway, the other for pulling stumps out of the ground. |
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| Good bye | Dec 1 2009, 01:04 AM Post #23 |
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I have used all three lower gear ratios in both series of cars. I have 4.11's in my 95 1.0 4 door sedan now and it drives nicely and gets 45 mpg with my son-in-law and normal 65+ mph driving. My daily driver is a 91 coupe with 3.79's and I am going to put 175/70-13's on next weekend. This car has 155-12's now and has been getting 52 mpg in summer and around 42-45 now that it is colder. The 3.52 set is 10% more and would really be a stretch in a heavy car like a 98. IMHO |
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| Woodie | Dec 1 2009, 06:37 AM Post #24 |
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Change it to what? Yes, it is a separate part. As a matter of fact, fifth gear is outside the main unit, under the black cover, you might be able to change it with the transmission in the car. Problem is, the only thing you could change it to is the exact same gear. Every Swift/Metro sold in North America came with a .757 overdrive fifth gear. European GTi's got a .870 fifth, but there's obviously an availability problem and besides, that's going the wrong way. |
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| bogs | Dec 1 2009, 11:20 AM Post #25 |
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Duct tape heals all wounds
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So if all the trannys are exactly the same gearing wise except for the final gear, and your trying for top mileage, why wouldn't the first order of business be to swap out the final gear for a 3.52:1 ratio? Or am I missing something incredibly stupid and simple, aside from the change in performance? |
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| Dallas | Dec 1 2009, 12:26 PM Post #26 |
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no, that is what you do. some people just cant always find them. however, I used a 3.52 trans in my car for better performance. I have TOO much power, and the longer gears aid in traction and it feels cool taking second to almost 120kmh at 8500rpm |
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| nerys | Dec 1 2009, 04:03 PM Post #27 |
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Grr
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So the gears are all the same and they all INTERFACE with another gear and THIS other gear is what determines the ratio's? Can I purchase just this gear and install it? |
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| Dallas | Dec 1 2009, 05:43 PM Post #28 |
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yes you can. its called the differential |
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| Woodie | Dec 2 2009, 06:53 AM Post #29 |
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No, that's pretty much it. The 3.79 from the XFI is a mileage improver, and the 3.52 from the four cylinder swift (rare) is even better, but the further you go, the less fun the car will be to drive in town. I wouldn't go any further than 3.79 without doing something to the engine to improve low end torque. The next problem is installation. The final drive gear consists of two gears, one of which is machined into the countershaft. In other words, changing this gear set involves a TOTAL disassembly of the transmission, big job. You're better off finding a working transmission and swapping it. |
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| bogs | Dec 2 2009, 12:24 PM Post #30 |
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Duct tape heals all wounds
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Ah, I was missing something incredibly stupid and simple, it is machined onto the shaft. That explains a LOT. Thanks
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