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Old 10-05-2008, 04:16 PM   #1
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Default Need advise on Diff fluid for 8ight-t with vspec

Hey guys,
Well today ran for the first time a real race. Half way thru the main my center diff blew out. I would like to know what are you guys running with the losi 8ight-t with vspec in it. I currently have 7K front 10K center and 5K rear. I'm thinking on maybe going to 10K front 20K center and 7K rear. Please let me know and advised greatly appreciated.
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Old 10-05-2008, 04:28 PM   #2
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I'm new to the game also, and asked this same question a few months ago,,, I'm no pro and a newbie, and run a Mugen not a Losi,,, but the answers I got were 5-7-2,,5-7-3,,I race with guys that run 5-5-5,,, I hope you get the help you need bro!!!
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Old 10-05-2008, 04:47 PM   #3
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I run an 8t and 8ight, with .28 Ninja and EB Mod V-Spec, I run Truhe's set up for both and they work for me, I don't think you blew the diff cause of the oil, there might have been a little more to it, binding or something like that, just my 2cents.
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Old 10-05-2008, 05:47 PM   #4
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Quote:
Originally Posted by Toiffel View Post
I run an 8t and 8ight, with .28 Ninja and EB Mod V-Spec, I run Truhe's set up for both and they work for me, I don't think you blew the diff cause of the oil, there might have been a little more to it, binding or something like that, just my 2cents.
truggy is 7-10-5
buggy 5-7-2
I agree with you. I think because of the traction on the track today it was really wet and also I think I overfilled the diff cups. Well tomorrow I'm taking it apart to see what's the damage.
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Old 10-05-2008, 05:51 PM   #5
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I've heard of several people having problems with the center diff, call losi tomorrow, talk to Bob or Bill, from racing support/tech support explain to him what happened and they should take care of you!! At least that's what the have done for me!!!
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Old 10-05-2008, 05:52 PM   #6
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Originally Posted by Toiffel View Post
I've heard of several people having problems with the center diff, call losi tomorrow, talk to Bob or Bill, from racing support/tech support explain to him what happened and they should take care of you!! At least that's what the have done for me!!!
Cool will do that. Think I'm going to switch over to the HD diff cases.
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Old 10-05-2008, 05:55 PM   #7
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ahhh HD diff cases, just be careful if you switch all three diffs, make sure you shim the rear one properly or you are going to have a lot and I mean a lot of rear diff problems!!! I actually went back to the stock cases in the rear!
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Old 10-05-2008, 06:28 PM   #8
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Originally Posted by Toiffel View Post
ahhh HD diff cases, just be careful if you switch all three diffs, make sure you shim the rear one properly or you are going to have a lot and I mean a lot of rear diff problems!!! I actually went back to the stock cases in the rear!
Oh Ok thanks for the heads up.
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Old 10-05-2008, 10:35 PM   #9
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yes shim the rear correctly or else

on my truck i ran 7-10-3 it seemed to give me better drive through the corners with the 3k rear
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Old 10-06-2008, 02:36 AM   #10
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Quote:
Originally Posted by NitroLuver View Post
yes shim the rear correctly or else

on my truck i ran 7-10-3 it seemed to give me better drive through the corners with the 3k rear
Yeah, they are a get set of weights for the oils, they are right on the money
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Old 10-06-2008, 05:03 AM   #11
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i went to 7 15 3 for me it feels way more stable, 10 in the center it felt twitchy.
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Old 10-06-2008, 07:11 AM   #12
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Quote:
Originally Posted by Toiffel View Post
ahhh HD diff cases, just be careful if you switch all three diffs, make sure you shim the rear one properly or you are going to have a lot and I mean a lot of rear diff problems!!! I actually went back to the stock cases in the rear!

whats so different from the old cases to the HD that would require extra attention ?
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Old 10-06-2008, 07:20 AM   #13
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HD Diff cases are not the same dimensions as stock ones, and if you are familiar with rear diff on the 8t, any bit of play just adds to a potential rear diff failure, I experienced this first hand, went thru many rear pinions and diff gears, and couldn't figure out what was going on, until someone on the Sgrid pointed this out to me, instead of shimming the rear diff I went back to the stock case and the problem went away. If you ever talk with someone that has experienced a rear diff problem, they wil tell you that in order to fix the problem everything in the rear needs to be changed, and that is everything, gears, bearings, cases, diff cases and outdrives, once one these elements has gone bad throws everything out of sync, so instead of slowly changing one piece at a time, avoid some frustration and do a complete overhaul. And as I said, this is from my personal experience with the 8t.
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Old 10-06-2008, 08:10 AM   #14
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i never had an issue swapping my new HD cases into my 1/2 year old 8T...old cases n all....i did however use the alum inserts...and i am anal on changing the rear bearings every month or so...or w/e i got the rear end apart....i dont think they are that different..but i didnt exactly measure them up before installing....any one got New HD cups to measure against the standards ?
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Old 10-06-2008, 08:38 AM   #15
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this is posted on the grid

iliasark
THE Ilias response 3081 of 3540: Sep 1 02:42 EDT 2008

--------------------------------------------------------------------------------

Esteban,are you using the new HD diff cases? This is the problem in most
cases,I also had this problem,after having the HD cases,just shim the
diff,replace the pinion and crown gear and you're good to go,it seems
that there is a slight difference between the HD dif cases and the older
ones....
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