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Old 06-26-2011, 05:06 PM   #811
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Default gear diff oil

Iwould like to know if like 70 to 100 shock oil is the same as700to 1000 diff oil.
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Old 06-26-2011, 06:41 PM   #812
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Old 06-27-2011, 04:25 AM   #813
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how are you guys finding the specr gear diff hold up in mod any weaks points in the diff that i should carry spares of cheers
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Old 06-27-2011, 10:51 AM   #814
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Iwould like to know if like 70 to 100 shock oil is the same as700to 1000 diff oil.
It is close, and varies a little by brand 700 is closer to 60wt and 1000 is close to 75wt.

Again it varies a little by brand. There are several cross reference charts available online.

Last edited by ebruce; 06-27-2011 at 11:06 AM.
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Old 06-27-2011, 06:18 PM   #815
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http://www.dowcorning.com/content/di...-rheology.aspx

the above is from the horses mouth regarding silicone fluids

"Silicone fluids range in viscosity from 0.65 cs (thinner than water) to more than 20,000,000 cs (thicker than chewing gum)."

So I guess I can put bubblelicious or Wrigleys in my gear diff as a tunning option?

so is the theory for thicker oil based on non-newtonian fluid behaviour? ei, give or stay fluid like under little or slow force but increase resistance to an almost solid state when applied with a fast strong force?
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Old 06-27-2011, 07:37 PM   #816
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i have 2 of the old gear diffs and just purchased another from a new batch noticed the material is different on the gears and they are not as good as the old ones. i put it together and shimmed it correctly and did not last long, rebuilt it with the old gears and it is good with no problems.
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Old 07-03-2011, 02:10 AM   #817
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has any one tried anything other than putty in there front gear diff and thoughts of the outcome. cheers
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Old 07-04-2011, 07:43 PM   #818
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500,000 diff oil works fine as a starting point as well.
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Old 07-04-2011, 08:11 PM   #819
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has any one tried anything other than putty in there front gear diff and thoughts of the outcome. cheers
Just put a Spec-R front diff in my 008 mod TC and am using the Lucas Auto Transmission Fix found at any local auto supply store. The stuff is REAL thick, creates a thin film, is known to prevent slipping, keeps seals from leaking and will not foam. It bites hard while on power and off power allows nice diff action. Oh and it's around 20x cheaper then the 1zillion snake oils. I will report back after a few weeks running.

http://www.lucasoil.com/products/dis...tid=9&loc=show
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Old 07-05-2011, 02:41 AM   #820
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Ran my gear diff for the first time in my Mi4 on the weekend and picked up 2 tenths. Ended up running 3000wt oil after trying 1000 and 2000 but will try 5k and 7k next practice.

Stupidly i thought the little hex screws that hold it together were a 0.5mm driver and it is actually 1/16th. I've nearly stripped one out as Ive pulled it apart and back together a few times trying different diff oils. Is there anywhere i can buy replacement screw kits for these gear diffs? I can only find replacement gear and gasket sets online. All the old versions Ive seen of these have small phillips head screws. Wish i got those now as they are idiot proof...
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Old 07-05-2011, 03:37 AM   #821
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Ran my gear diff for the first time in my Mi4 on the weekend and picked up 2 tenths. Ended up running 3000wt oil after trying 1000 and 2000 but will try 5k and 7k next practice.

Stupidly i thought the little hex screws that hold it together were a 0.5mm driver and it is actually 1/16th. I've nearly stripped one out as Ive pulled it apart and back together a few times trying different diff oils. Is there anywhere i can buy replacement screw kits for these gear diffs? I can only find replacement gear and gasket sets online. All the old versions Ive seen of these have small phillips head screws. Wish i got those now as they are idiot proof...
what were your findings going thicker? what did it do to the handling of the car. cheers
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Old 07-05-2011, 05:49 AM   #822
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what were your findings going thicker? what did it do to the handling of the car. cheers
I felt like it turned in better and more planted and stable in the rear.
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Old 07-05-2011, 08:40 AM   #823
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Stupidly i thought the little hex screws that hold it together were a 0.5mm driver and it is actually 1/16th. I've nearly stripped one out as Ive pulled it apart and back together a few times trying different diff oils.
Not really stupid, its made in China so one would think they are 1.5mm. There is a very small difference between 1.5mm and 1/16 and if they are just a bit big then the 1/16th would fit. Pretty sure mine are 1.5mm but I'll try the 1/16th next time. Haven't seen replacement screws, may need to go to a philips head and pick one up from the local hardware store.
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Old 07-05-2011, 10:18 AM   #824
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Originally Posted by Benzaah View Post
Ran my gear diff for the first time in my Mi4 on the weekend and picked up 2 tenths. Ended up running 3000wt oil after trying 1000 and 2000 but will try 5k and 7k next practice.

Stupidly i thought the little hex screws that hold it together were a 0.5mm driver and it is actually 1/16th. I've nearly stripped one out as Ive pulled it apart and back together a few times trying different diff oils. Is there anywhere i can buy replacement screw kits for these gear diffs? I can only find replacement gear and gasket sets online. All the old versions Ive seen of these have small phillips head screws. Wish i got those now as they are idiot proof...
http://store.hkshobby.com/product_in...oducts_id=8856

I stripped a screw head, and all I had to replace it was extra Mi4 spur gear screws. It tightened down just fine, and that diff hasn't leaked a drop.

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Old 07-05-2011, 12:33 PM   #825
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guys im running the gear diff in the rear of my mod t3'11 and am having alot of fun with it. gives alot more on power steering and i like it alot!

one problem i am having is it is throwing out oil, not excessively but it is enough to see oil on the chassis by the diff after a run. also due to this i am having to refill it with 2000 losi oil every 6-7 runs. is there anyway to keep the gear diff from leaking, and it appaears it is leaking out of the middle where the green gasket is. any ideas?
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