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Old 01-05-2009, 05:16 PM   #1
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Default XXX4 HELP PLEASE!!!

ok i was building a front diff on my xxx4 and i have the metal drive cups well there is no flat spot for the diff ring to seat any help is appreciated thanks
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Old 01-05-2009, 05:23 PM   #2
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do you mean the outdrives or the inside of the outdrives where you put the diff rings on??. if you mean the outer side of the outdrive where the head of the cvd is..than yes the steel outdrives have no place to put the rings only the composet outdrives have the groove for the rings. i have never heard or seen a set of losi xxx4 steel outdrives to not have the flat spots on the diff side for the diff rings....hope this helped....
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Old 01-05-2009, 05:28 PM   #3
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these are the molded ones....
http://www.losipartshouse.com/servle...et-cln-/Detail
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Old 01-05-2009, 06:58 PM   #4
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I think you might be talking about the inside of the outdrive where the diff ring goes in. On the original XXX diffs, the diff rings had a "D" shaped cutout in the middle and the matching keyed outdrive. The new outdrives for the XXX CR diff do not have the D ring. They actually use a brass shim to help the diff ring slip a little and increase the life of the diff. If you have the new CR outdrives, just get the new CR diff rings and you should be fine. You can use the new CR rings with the old D shaped outdrive. It will still work.

Hope that might help.
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Old 01-06-2009, 02:27 AM   #5
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Chris,
Since you "can" use the round diff rings with the old D-outdrives, has it been popular to put B-Fast diff kits into the xxx-4?
Thanks.
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Old 01-06-2009, 11:02 AM   #6
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i just filed a flat spot in each of the outdrives so the diff rings would key in i went and ran it and operated great hopefully it will stay that way
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Old 01-06-2009, 02:36 PM   #7
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BobWoodhouse- BFast produces the old D rings as well as the CR style. I use the D rings in the front of my xx4.
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Old 01-25-2009, 10:58 PM   #8
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well i found out after eatting up the molded ones few times runing brushless and lipos i found out that the Transmission Outdrive Cup LOSA3073 XXX-T work well with no mods haveing to be made i found this on the break down of the xxx4 car LOSA3073 but the but when i whent to the parts list for the xxx4 it wasnt on the list just in the break down pics so i looked it up come to find out it a xxxt num its a great replacement to steel
http://cgi.ebay.com/ws/eBayISAPI.dll...m=190232772489
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