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Must watch video hd gear mod

2Shoes said:
I just finally got around to working on the YXL again after moving and building up an RR10 Bomber. I did this mod to my front pinion and it works flawlessly in the DHawk Builkhead. I'll post up once I get the whole truck back together. Why did they make getting to the front gears so difficult?

Now to get the entire front end back together so I can work on the rear axle.
Click to expand...

You are probably taking apart too much of the front. I would write the guide but I can't say for exact certain what you have to remove cause its been a couple months and I don't have it in my face. It takes about 10 minutes.
 
I'd be curious to hear it too as I haven't figured out a way to get the bulkhead cover off without removing the entire bulkhead (which, as far as I can tell, means removing the entire front clip)


Sent from my iPhone using Tapatalk
 
Yep I leave everything together just unbolt the bulkhead... pull the shock tower up and slippery out the bulkhead... 7 minute job... I show a example of this on my YouTube channel. Im glad that you decided to keep the XL!
 
I had to rebuild the entire front end due to some other issues so I went ahead and broke it all down. I added a DHawk bulkhead, HD gears, aluminum shock tower and replaced all of the plastic forward of the bulkhead due to scratches and some damaged screw heads.
 
Clarification needed......

I have the V2 DHAWK bulkhead and the DHAWK aluminum spacer with the HD gear set. Do I need to do the pinion mod too? Some confusion on if it is needed with the version 2 of the DHAWK bulkhead. If I turn it by hand right now there is one spot that has a notch. I have a new plastic diff cup on the way just in case the one I have is damaged. I can't see anything but with plastic you never know.

I have already stripped two sets of gears with the old plastic bulkhead. This front diff has been frustrating to say the least. My rear has been fine, front has never been smooth. Only have 3 packs through the kit and have had it nearly a year.
 
Well I helped Jimmy/Dhawk with the V2 but I never received one..the V2 that he sent me happen to be a V1 lol...I was anxious to make sure he got it right... Chris a.k.a Everyday Rc did a video over the v2 and said it was great....can you show us a picture of the pinion pack..? Are you using shims? Hopefully we can get up straightened out. "thumbsup"

I'm hoping that you didn't receive a V1
 
BarHarborBasher said:
Well I helped Jimmy/Dhawk with the V2 but I never received one..the V2 that he sent me happen to be a V1 lol...I was anxious to make sure he got it right... Chris a.k.a Everyday Rc did a video over the v2 and said it was great....can you show us a picture of the pinion pack..? Are you using shims? Hopefully we can get up straightened out. "thumbsup"

I'm hoping that you didn't receive a V1
Click to expand...

I just got the bulkhead last week so hopefully it is the version 2. Any measurements I can check? I do not have any shims installed right now. I will take a picture and post it later. Like I said, it is relatively smooth besides one spot in the turn. No visible damage on anything and brand new ring and pinion gears.
 
BarHarborBasher said:
The thread shows a close up of the measurements for the V1 & V2
Click to expand...

Got it figured out. For some reason it wasn't sitting right in the bulkhead. Reset the diff and used marine grease. Pretty smooth now... Not perfect but it should be good enough. Got everything back together but the upper bulkhead didn't want to fit. I think I am going to replace it with the hot racing aluminum bulkhead since the metal standoffs will be much easier than the plastic that is impossible to line up.

One thing of interest when I took a closer look. The HD gears I just got last week actually have the end of the spiral tooth already removed. It is like the mod is already done from the factory now. Did Axial finally listen to you?
 
leahcim said:
Got it figured out. For some reason it wasn't sitting right in the bulkhead. Reset the diff and used marine grease. Pretty smooth now... Not perfect but it should be good enough. Got everything back together but the upper bulkhead didn't want to fit. I think I am going to replace it with the hot racing aluminum bulkhead since the metal standoffs will be much easier than the plastic that is impossible to line up.

One thing of interest when I took a closer look. The HD gears I just got last week actually have the end of the spiral tooth already removed. It is like the mod is already done from the factory now. Did Axial finally listen to you?
Click to expand...

how about posting a pic?
 
I'd really love to see a picture sitting in a bearing... please ..if you have a hard time loading pictures you can email it to me more.. thanks
 
Nevermind, just checked and the HD pinion has the lip at the bottom of the teeth. Although my mesh appears to be fine at this point. It is in a DHawk V2 Aluminum bulkhead. No grind after two packs and no visual damage. Time will tell!

 
Last edited:
Looks like I'll have to do this mod. The rear diff went out the other day. I haven't opened it up but I'm guessing the ring and pinion are shot.
 
Last edited:
Well guys this week I'll be working a BHB HD Bushing replacement for the HD Pinion
This will elevate the necessity to modify the HD Pinion as well as solving the chronic failure of the pinion bearings...
Possibly this will help Vanquish out so they could release the XL axle again!!!
 
I am now 40 packs in on the BHB mod with 6S and stock front and rear housings with no gear issues. I have had pinion bearing issues but the gears survived. Thanks BHB.
 
pro mod steve said:
I am now 40 packs in on the BHB mod with 6S and stock front and rear housings with no gear issues. I have had pinion bearing issues but the gears survived. Thanks BHB.
Click to expand...

Thanks for being First to try it !! "thumbsup" and you're absolutely right about the stock housing... tuff as hell with smooth operating gears that's for sure!! I've lost count on runs ... I think it's around 350+... some days I went through two sets of 4 & 6s during testing... still look awesome "thumbsup"
 
Just got my XL kit and building up the front and rear and instantly feel horrible mesh as I tighten down the bulkhead and the rear diff cap. I had to find out for myself before blindly following the crowd.

What I am seeing (correct me if I am wrong) there are two ways to solve this problem:

1. Grind off the lip from the pinions

2. Get a thinner spacer/bushing between the two bearings

Either of these options will require shims, right? Since new kits come with HD gears, they don't include shims.

I am ordering up a spare set of gears just to be ready but need to know if I am getting shims or not.
 
t3yf5g said:
Just got my XL kit and building up the front and rear and instantly feel horrible mesh as I tighten down the bulkhead and the rear diff cap. I had to find out for myself before blindly following the crowd.

What I am seeing (correct me if I am wrong) there are two ways to solve this problem:

1. Grind off the lip from the pinions

2. Get a thinner spacer/bushing between the two bearings

Either of these options will require shims, right? Since new kits come with HD gears, they don't include shims.

I am ordering up a spare set of gears just to be ready but need to know if I am getting shims or not.
Click to expand...

thinner spacers will do nothing to alleviate the issue since the tightness happens due to the step under the pinion teeth. This step pushes the pinion further into the ring gear beyond what the shims and bearing dictate. By removing the step the pinion will not stick out as far but you have to eat up the additional space with a couple extra shims, which you have to purchase.
 
Okay I finally understand. Took my rear end apart and played with bearings and my calipers. I have extra bearings since I got some fast eddie bearings right of the bat.

While replacing the spacer with a bearing (bearing being 4mm thick and the spacer being 4.9) I could get the pinion sitting back where it meshes buttery smooth. Getting to prove myself wrong I see why that lip/step in the pinion "forces" you to "have" shims at the teeth when you actually need shims at the snap ring. Least that is where I am seeing the issue.

Guess I am pulling out the grinder and going to town on it.
 
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