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Old 12-11-2006, 07:30 AM   #1
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Default need help fitting 4200 into jrxs

just wondering if any one has any tips on how to fit ib 4200 batteries into a jrx-s.
again thanks for the help
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Old 12-11-2006, 07:45 AM   #2
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You'll need the aluminum battery tray.
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Old 12-11-2006, 07:45 AM   #3
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Quote:
Originally Posted by bludevlsi
just wondering if any one has any tips on how to fit ib 4200 batteries into a jrx-s.
again thanks for the help
You'll need the aluminum option battery tray. You also might need to grind the bulkheads in the rear so the battery can fit better. One last thing, sometimes if the batteries have thick shrink wrap on it, it might need to be removed or use thinner shrink.

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Old 12-11-2006, 04:42 PM   #4
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yeah i have the aluminum tray. it seems that they are too long. like the center support is in the way and it looks like the rear diff may rub. just wondering if any one else has had these issues.
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Old 12-11-2006, 04:52 PM   #5
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Like chicky03 said, you need to take of any shrinkwrap that may have been put on by your battery matcher so that the overall length of the battery will decrease. Oh and you do need the aluminum tray. Filing of the bulkhead should not be necessary if you solder good and you remove the shrink wrap. The only thing that may need filing is the rear cell slot in the chassis, if you didn't do enough in your initial assembly. Hope this helps.
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Old 12-11-2006, 05:01 PM   #6
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Quote:
Originally Posted by bludevlsi
just wondering if any one has any tips on how to fit ib 4200 batteries into a jrx-s.
again thanks for the help
Another thing to keep your eye on is the rear most battery slot (the one that is in the chassis). As the manuel says, you need to file that slot so that a cell will sit flush with the bottom of the chassis. As long as you file that slot so that a cell will sit properly and use the aluminum battery tray, you will probably be okay. My 4200's have an extra shrink wrap layer (the way the come from the matcher) and they are a little tight, but fit fine without any grinding of the bulkheads. I would start with making sure the rear slot is big enough, then if you still have problems, remove shrink wrap or grind the rear bulkheads down. Good luck!
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Old 12-11-2006, 05:58 PM   #7
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Quote:
Originally Posted by bludevlsi
yeah i have the aluminum tray. it seems that they are too long. like the center support is in the way and it looks like the rear diff may rub. just wondering if any one else has had these issues.
If the packs are glued or saldered too far apart this can happen. I had to reassemble my 3800's to get them to fit length-wise.
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