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building a dif

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Old Aug 19, 2009 | 07:15 AM
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Default building a dif

Ok, i am building a diff and have a extra pumpkin from a 05 z with a vlsd, and a xterra open dif with 4.9 gears. My question is can i use the open diff and weld up the spider gears on the xterra diff and put it and the 4.9 in the z pumkin housing with the vlsd stubs?
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Old Aug 19, 2009 | 07:56 AM
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4.9??? your gears are gonna be crazy short, top speed in each gear almost half of what it is now...
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Old Aug 19, 2009 | 08:02 AM
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yea i know but i need a 1/8mile N/A monster to suit the track near me. just need to know what i can do to lock this rear up without spending the $ on a crazy limited slip thats just not needed. This is my spare rear, i will swap it in for race days. have the 3.55 with stock vlsd for day to day.
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Old Aug 19, 2009 | 08:29 AM
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I think you will find that the 4.9 will not go into that pumpkin, nor bolt up to your driveshaft, without significant custom work. VLSD stubs are different from open diff stubs as well.
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Old Aug 19, 2009 | 08:55 AM
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ouch, 1/8 mile is so pointless haha
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Old Aug 19, 2009 | 09:06 AM
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this is funny
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Old Aug 21, 2009 | 06:26 AM
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Anyone? here have knowlege if the xterra 200mm r/p will fit in the diff? thanks
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Old Aug 21, 2009 | 07:22 AM
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gotta love those who ask a question and then don't even bother to read the answer
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Old Aug 21, 2009 | 07:56 AM
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well, i just pulled it apart and the 200mm ring and pinion DO fit with 49 tooth ring and 10 tooth pinion. thanks for the answer, i just need a open diff now to weld. anyone have one laying around? thanks
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Old Aug 21, 2009 | 08:11 AM
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Define "fit". Any R200 ring and pinion will phyiscally go inside the case - getting them to work is a different story altogether.

Did you use a pinion bearing? if so, which?

Did you use a crush collar? If so, which?

Did you bolt the ring gear to the diff you intend to use? If so, with which bolts?

Did you try to install the mounting flange for the driveshaft to the pinion? If so, which one?

These are just some of the issues
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Old Aug 21, 2009 | 08:15 AM
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adam is correct on the stub axles, i need a open diff with the stub axles and it looks like ill be ok. same pinion bearing, had to machine the ring to 13mm bolts, and im getting new nut and crush collar ordered. got to find an open diff first! Im stuck with two vlsds on hand. any one want to swap a vlsd for an open?
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Old Aug 22, 2009 | 08:39 AM
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im curious on the matter as well. how hard is the swap. i have a base Z and will swap with you if its a straight drop in. also if a 4.9 ratio is to short then what would be a good ratio you know something that will give you a faster acceleration. ohyea pm me on the swap.
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