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greasing your diffs any help plz? pros?

greasing your diffs any help plz? pros?

Old 07-20-2006, 10:02 PM
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Talking greasing your diffs any help plz? pros?

hi i am new to 1/8 nitro buggy racing and want to know a few things regarding greasing the diffs.

number 1. how often should i do a grease change?

2. how do i know when its time to do a grease change (will the gears
have a rough sound or feel)?

3.what do different viscoscity or thicknesses do?

4. how will those different thicknesses or viscoscity
of grease effect the handling of my car and operation of
the diffs?

5.basically what does everything that greasing the diffs do?
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Old 07-20-2006, 10:24 PM
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Hmmmmm, ok. Lets start with changing diff oils... I change mine after every third weekend of racing. I personally am not sure how to "tell" when they need to be replaced but if I am not mistaken they just get filthy and don't lube your diffs properly. Next question: The thicker the diff oil the more push or pull you get from that diff. You want a thicker fluid in your front than your rear so your front end will pull you around the corner rather than your rear end pushing and fishtailing you. In my buggy I usually run 5000 in the front, 7000 in the center and 2000 in the rear.

Hope this helps
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Old 07-20-2006, 10:44 PM
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Originally Posted by downunder23
hi i am new to 1/8 nitro buggy racing and want to know a few things regarding greasing the diffs.

number 1. how often should i do a grease change?

2. how do i know when its time to do a grease change (will the gears
have a rough sound or feel)?

3.what do different viscoscity or thicknesses do?

4. how will those different thicknesses or viscoscity
of grease effect the handling of my car and operation of
the diffs?

5.basically what does everything that greasing the diffs do?

1/ the pros change their diff oil between each heats.
for club racing, the oil is changed every other weeks.

2/ it tells ya when the oil viscocity gets thinner.

3/ on what diff ? front, center or rear ?

4/ see above.

5/ to limit their action (diffing).
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Old 07-22-2006, 02:04 AM
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Default diff fluids??

hi thanks for your advice but are you sure its not the opposite the lighter the fluid the more it pulls or pushes??
i would of thought it worked that way and also i checked teamx-ray.com and cheked some set ups and alot of them had either the same all thru the diffs (3k 3k 3k)some had heavier stuff in the front and some had heavier in the front so is what im looking for is a fluid set up for a quiet small track with medium traction and med bumps.
any suggestions any one??
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Old 07-22-2006, 07:09 AM
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change the oil wenever u can be bothered....i change mine everytime i blow a diff...or wenever i am so dam bored that my jaws drop...or im out of P***O magz....

take itlike this...higher viscosity like 50000 willgive u a bigger turning radius..somthing like 5000 willgive u a smaller turning radius..(turning circle)....thats the easy way or explaining it
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Old 07-26-2006, 12:40 AM
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You cannot apply thickness of oil to one factor, its really about the relationship between all 3 (Front Middle Rear)

If you have 553 (5000wt front 5000wt middle 3000wt rear), the diff with the lowest oil (Rear) will unload first in the corner. To understand this, you need to understand how the diff works. This is the point at which both outdrives of the diff stop acting similarly.

So with lower oil, the diff will unload sooner, at lower force. With a higher oil, the diff will retain parity longer, but will break at higher rpm/force.

So its all about playing with the ratios between FMR. I would start with 555, try that for a few tanks, then try 371 and see how it changes.

This has been my understanding, but feel free to correct me.
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Old 07-26-2006, 06:46 PM
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how about in a 2 wd only one rear diff what is best to use in that?
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Old 07-26-2006, 11:49 PM
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Originally Posted by bumm_off_street
how about in a 2 wd only one rear diff what is best to use in that?
tomatoe sauce or mayonnaise.....works for me
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