New diff cup

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, and others.
M

Martin_

Well-Known Member
Messages
266
Reaction score
0
Location
Quebec, Canada.
Today I made new diff cup for my TT, I have not yet any problem with the original, but the goal is to adapt the FLM 155mm extended axle (made for HPI baja) with also bigger ball end.


I made it from 4140 steel and I hardened them.
 
Here a non slotted one, and on that one I keep the ringed end non slotted.Also some pic of the rear.

non slotted.webp

004.webp

005.webp

007.webp

/monthly_2010_05/583c605da851c_nonslotted.jpg.b2c0fe909fc9ad9dd977cb9f6791d61c.jpg

/monthly_2010_05/004.jpg.03246a4dbcfe3215408042354298c7d2.jpg

/monthly_2010_05/005.jpg.1bce7335792bcf95968e725b7107716c.jpg

/monthly_2010_05/007.jpg.010549437cd4c23cf20ddf2135c790da.jpg
 
WOW really great...I wish you worked for Dark Soul so they could go into production...


Uhh, I think your in need of a new gear set next...lol
 
I will first see how the cup hold before tinking about selling a few, but this is very time consuming, I don't have a CNC lathe, so.... I sit it near the lathe and watch the work, it's really annoying, I don't know if I can make a batch at a reasonable price.


As for the gear, I'm in wait for real hardened sets, those plastic one do not last for very long, about one tank a set, I bought several plastic MCD sets to see what gear should be fine for my 2 speeds projet, now they are all melted, but I have a good idea of what combination I will use.
 
Nop, the one in the link are FLM cup for 1/5 HPI baja.


They can fit on the rampage hub but you will need cutom axle (15mm ball end) and custom differential cup (15mm hole), like the one I make, Rampage are 12mm.


The goal with bigger ball end axle is to work better with the extra suspention travel I have, and to help a little more I also widened both front and rear with a larger A-arm support, making the axle less angled.
 
Martin said:
Here a non slotted one, and on that one I keep the ringed end non slotted.Also some pic of the rear.
Click to expand...
Hey martin is that an hpi sway bar i see ? And did it help you with body roll ? I put hpi sway bars on my mt and it really helped with throwing these big tires around.IMG_2308.webp

IMG_2348.webp

/monthly_2010_04/IMG_2308.jpg.68184a2c2408f5574495a77259520c75.jpg

/monthly_2010_06/IMG_2348.jpg.d0d9e832c3a8175e0ce3c44d9ccec172.jpg
 
Last edited by a moderator:
Yes this is HPI sway bar, I installed it on front and rear, and yes this is a completely different TT now, better control and stability.
 
No, HPI are 125-128mm and redcat are 135 or 138mm.


FLM extended dog bone (for FLM extended arm kit) are 155mm pin to pin, this is the one I use.
 
Back
Top