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Old 07-26-2011 | 05:04 PM
  #6751  
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[QUOTE=jwmustang;9443209]
Originally Posted by dayglo33
A couple questions.
1 Has anyone have the spur gear rub the center mount?
QUOTE]

I had that problem.
I fixed it by replacing 89019.Took me forever to figure that out. Since it is not a moving part I figured that cant be bad. Well I think what happens is the diff get hot & after a while those parts loose their shape. I want to change it to metal when Grid comes out with one.Integy has one but I rather get Grids.
We should have it ready within the month. Getting ready to mill another prototype which we think will go to production. It will be a one piece design that stays on the chassis if you need to take out the center diff.
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Old 07-26-2011 | 05:11 PM
  #6752  
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Originally Posted by Team Grid RC
Give this a try. We have been using SuperLube grease for years on all our diffs including the center diff. Silicone is an excellent dampening medium for shocks and good on o-rings, but .... it lacks the required friction reduction properties needed for the gears in the diffs.

SuperLube is 100% synthetic and friendly on rubber o-rings and ideal for metal on metal contact. We do maintenance on our gear boxes once a year and nice thing about it, it doesn't leak like oil and its cheap when you buy a large tube of it.

The other thing you need to know is, grease is more effective on open gears like the ones in the diffs which is made from cast aluminum and needs good lube to keep them from wearing out. Well, we just eliminated our aftermarket diff cases with this info for you guys.

Team GRID
Sound interesting...What would be an equivalent silicone weight?
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Old 07-26-2011 | 05:23 PM
  #6753  
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Originally Posted by Arigato
Sound interesting...What would be an equivalent silicone weight?
Silcone changes its viscosity slightly with temperature changes as well it thins out while it is wearing out. As for weight not sure because it is a grease not a thick liquid.

Synthetic grease maintains its viscosity during it entire life and don't need frequent changes like oil.

Once you switch to this grease, just re-tune your suspension.

SuperLube is readily available in large tubes. All hardware stores and some Walmart carries it. A large tube sells for $11.
Attached Thumbnails Team Associated RC8Be Thread-superlube.jpg  

Last edited by Team Grid RC; 07-26-2011 at 05:38 PM.
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Old 07-26-2011 | 05:33 PM
  #6754  
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[QUOTE=jwmustang;9443209]
Originally Posted by dayglo33
A couple questions.
1 Has anyone have the spur gear rub the center mount?
QUOTE]

I had that problem.
I fixed it by replacing 89019.Took me forever to figure that out. Since it is not a moving part I figured that cant be bad. Well I think what happens is the diff get hot & after a while those parts loose their shape. I want to change it to metal when Grid comes out with one.Integy has one but I rather get Grids.
Hot Racing makes an aluminum two piece for the rc8, thats the ones i'm running
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Old 07-26-2011 | 06:18 PM
  #6755  
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Any help on my set up questions guys?

Thanks.
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Old 07-26-2011 | 06:18 PM
  #6756  
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Originally Posted by Team Grid RC
Give this a try. We have been using SuperLube grease for years on all our diffs including the center diff. Silicone is an excellent dampening medium for shocks and good on o-rings, but .... it lacks the required friction reduction properties needed for the gears in the diffs.

SuperLube is 100% synthetic and friendly on rubber o-rings and ideal for metal on metal contact. We do maintenance on our gear boxes once a year and nice thing about it, it doesn't leak like oil and its cheap when you buy a large tube of it.

The other thing you need to know is, grease is more effective on open gears like the ones in the diffs which is made from cast aluminum and needs good lube to keep them from wearing out. Well, we just eliminated our aftermarket diff cases with this info for you guys.

Team GRID
So you use grease instead of oil on center diff?
Right now my diff gets hot. Is your hot with grease?
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Old 07-26-2011 | 06:27 PM
  #6757  
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Originally Posted by jwmustang
So you use grease instead of oil on center diff?
Right now my diff gets hot. Is your hot with grease?
Nope, Never gets hot. The grease is a true synthetic lubricant with PTFE (Teflon) that has one of the lowest coefficients of friction.

Heat is caused by friction.

We use the grease on all three diffs. Just pack it and forget it.

Last edited by Team Grid RC; 07-26-2011 at 06:45 PM.
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Old 07-26-2011 | 07:07 PM
  #6758  
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Originally Posted by ffiB
Any help on my set up questions guys?

Thanks.
I had the same issue when I first built the car. I have tons of 2wd exp on dirt....but this is my first heavy 8th scale 4wd. What I learned..... is that getting the weight to transfer forward off power needs to be coaxed along sometimes. Driving the car a bit harder and using the brakes to set the front end has helped me a ton in the tighter bits of the track.
I also made some small changes to the kit setup.
The only non kit parts on the car are aluminum chassis braces, front springs and carbon center top plate.

I now am running the truggy front silver springs with 35 weight oil. Upper shock location laid down one hole from the kit setup. 2 deg negative camber.
Silver buggy spring in the rear with 30 weight oil. Stock shock and camber link locations. (I did try the inner camber link location one hole down....the car had tons of forward bite....but would not rotate well) 2 degrees negative camber
Ride height .....28mm.
Jconcepts Punisher

I would like to get the car better through some of the rough stuff....but I am very comfortable with it now on 90 percent of the track.

Best of luck.

Cheers,
George
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Old 07-27-2011 | 09:23 AM
  #6759  
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Originally Posted by Team Grid RC
Nope, Never gets hot. The grease is a true synthetic lubricant with PTFE (Teflon) that has one of the lowest coefficients of friction.

Heat is caused by friction.

We use the grease on all three diffs. Just pack it and forget it.
Very Intriguing! I wish this came up before I did my diff rebuild I would have loved to try it.

Curious though -- You said this "grease" you're using does the trick. Don't you take the resistance factor out of using different weight diff oils? My RC8be has 5k, 5k, 3k. If you use grease you don't get this difference. While the maintenance is simplified IMMENSELY (and believe me, I'm very interested to do this) --- Don't you take away from the performance & set up of the vehicle by using that grease? The reason why I have a lower resistence diff fluid in the rear is so I can get better cornering.

I'll be curious to hear your answer to this Team Grid . And if you could, could you post a link of what grease you guys are using? thanks!
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Old 07-27-2011 | 09:44 AM
  #6760  
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The diffs and chassis get hot because the motor. Motor is connected to alum mount and the diff bearings transfer heat to diff gears and so on. You'll notice the chassis getting warm too. I use ptfe grease in my Traxxas diff and my 1/8th scale diff ring and pinions but not in the diff itself, to much resistance.
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Old 07-27-2011 | 02:03 PM
  #6761  
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Originally Posted by grod22
I had the same issue when I first built the car. I have tons of 2wd exp on dirt....but this is my first heavy 8th scale 4wd. What I learned..... is that getting the weight to transfer forward off power needs to be coaxed along sometimes. Driving the car a bit harder and using the brakes to set the front end has helped me a ton in the tighter bits of the track.
I also made some small changes to the kit setup.
The only non kit parts on the car are aluminum chassis braces, front springs and carbon center top plate.

I now am running the truggy front silver springs with 35 weight oil. Upper shock location laid down one hole from the kit setup. 2 deg negative camber.
Silver buggy spring in the rear with 30 weight oil. Stock shock and camber link locations. (I did try the inner camber link location one hole down....the car had tons of forward bite....but would not rotate well) 2 degrees negative camber
Ride height .....28mm.
Jconcepts Punisher

I would like to get the car better through some of the rough stuff....but I am very comfortable with it now on 90 percent of the track.

Best of luck.

Cheers,
George
Thanks.
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Old 07-27-2011 | 02:07 PM
  #6762  
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Has anyone tried both the elite and grid motor mounts on their RC8? I currently have the elite on mine and love it...... I am thinking of picking up a spare rc8 as a backup for race days and was wondering if anyone's owned both and what are the pros and cons for either........ Thanks
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Old 07-27-2011 | 02:14 PM
  #6763  
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Hey guys, I though I would just show everybody what I did to my RC8Be. I know that it is a racing car and I'm not even sure how much I will be racing, but I wanted to do something that no one has seen before. It may not be practical but I think it is awesome! It has Mamba Monster 2200kv and 2 Hi-Tec HS645 MG servos and Proline Road Rages and Proline Hole Shots with a JConcepts Punisher body. Tell me what you think.
Attached Thumbnails Team Associated RC8Be Thread-dsc_0033.jpg   Team Associated RC8Be Thread-dsc_0036.jpg   Team Associated RC8Be Thread-dsc_0037.jpg   Team Associated RC8Be Thread-dsc_0038.jpg  
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Old 07-27-2011 | 03:13 PM
  #6764  
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Originally Posted by Sarinexia
Very Intriguing! I wish this came up before I did my diff rebuild I would have loved to try it.

Curious though -- You said this "grease" you're using does the trick. Don't you take the resistance factor out of using different weight diff oils? My RC8be has 5k, 5k, 3k. If you use grease you don't get this difference. While the maintenance is simplified IMMENSELY (and believe me, I'm very interested to do this) --- Don't you take away from the performance & set up of the vehicle by using that grease? The reason why I have a lower resistence diff fluid in the rear is so I can get better cornering.

I'll be curious to hear your answer to this Team Grid . And if you could, could you post a link of what grease you guys are using? thanks!
See post #6753 for the pic on the grease.

Any synthetic grease will work as long as it is not petroleum based. We have been using SuperLube for years and years with great results.

If you use grease in all the diffs, they will work identical.

As for resistance. Little or none. All the diffs spin freely without any resistance.

There is enough things to tune for handling and driveability like sway bars, camber, caster, spring rates, shock oil, shock pistons. These can be done on the fly or very quickly at trackside, not diff oil changes especially the front and rear diffs.

I"ll post a video to show how smooth and little resistance grease has on the diffs.
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Old 07-27-2011 | 04:15 PM
  #6765  
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Originally Posted by daltonspeed16
Hey guys, I though I would just show everybody what I did to my RC8Be. I know that it is a racing car and I'm not even sure how much I will be racing, but I wanted to do something that no one has seen before. It may not be practical but I think it is awesome! It has Mamba Monster 2200kv and 2 Hi-Tec HS645 MG servos and Proline Road Rages and Proline Hole Shots with a JConcepts Punisher body. Tell me what you think.
I've never seen anything like it. Never even thought about trying 4 wheel steering. PLEASE POST A VID!!! I want to see that thing run

I love tinkering and this one looks awesome
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