Pre-production Boom Racing 109

Jrkilburn

Jrkilburn

V.I.P. Member
IMG_0511.jpeg

after getting the inner fenders and side plates installed I was able to clean up the wiring and finalize the selectable transfer case so now I can shift between 2 and 4wd.
I would still like to add a few more details to the engine bay but I have another major part coming for this next part that takes precedence. I’ll give you a hint…. It takes about two weeks to ship it from Europe…..
 

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DaveInNoVa

DaveInNoVa

Supporting Member
Jrkilburn said:
View attachment 51963
after getting the inner fenders and side plates installed I was able to clean up the wiring and finalize the selectable transfer case so now I can shift between 2 and 4wd.
I would still like to add a few more details to the engine bay but I have another major part coming for this next part that takes precedence. I’ll give you a hint…. It takes about two weeks to ship it from Europe…..
Click to expand...
SGS?
I have one on my Mojave 2 and I love it! I should put an order in for the 109 soon!
 
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DaveInNoVa

DaveInNoVa

Supporting Member
Is this the right thread for this?
I think I may have made a critical mistake while mounting the transfer case. The installation calls for a M3x10 and an M3x6 screw, and it appears I used two M3x10s. I inspected the gears and it doesn't look damaged but there is a definite 'hiccup' when I cycle the gears. I do have a spare BR transfer case (got it with a used unbuilt RC4WD Gelande 2 kit of all things) that would slot right in but I want to run the stock box first.

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Kear

Kear

Bleb
On gear roughness, something I did for a particularly rough RC4WD T-Case was I got some valve lapping compound and put it in the gear mesh and put a brushless drill on it's highest speed onto the input shaft and ran it like that for about a minute or two. the gears were a little sloppier but much, much smoother.
 
Jrkilburn

Jrkilburn

V.I.P. Member
Kear said:
On gear roughness, something I did for a particularly rough RC4WD T-Case was I got some valve lapping compound and put it in the gear mesh and put a brushless drill on it's highest speed onto the input shaft and ran it like that for about a minute or two. the gears were a little sloppier but much, much smoother.
Click to expand...
Something a bit less than lapping compound is actually Crest toothpaste with the “grit” in it. We used this truck quite a bit for the plastic Tamiya gears for TCS racing to reduce gear drag on new assemblies. Use the toothpaste as if it were grease on assembly, run at speed with a drill, clean everything and use a light grease (Cow RC Udder Butter) and things roll smoothly afterwards.
 
DaveInNoVa

DaveInNoVa

Supporting Member
Jrkilburn said:
Something a bit less than lapping compound is actually Crest toothpaste with the “grit” in it. We used this truck quite a bit for the plastic Tamiya gears for TCS racing to reduce gear drag on new assemblies. Use the toothpaste as if it were grease on assembly, run at speed with a drill, clean everything and use a light grease (Cow RC Udder Butter) and things roll smoothly afterwards.
Click to expand...
I've known about using toothpaste as a very light polishing compound for years but never related to RC...learn something new every day!
 
DaveInNoVa

DaveInNoVa

Supporting Member
After running the truck for the first time last night, I’m relieved to report there’s no issues with the transfer box gears. I’ll run it some more and then pull it apart to make sure there’s nothing floating around in there.
 
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