3D printed Hummer H1:Conversion to using metal differentials and gearbox
Non 3d-printed parts
(Click the name of the part to follow the link to aliexpress to buy)
or
or
You can install one of the all-metal transmissions or buy only the gears and print a transmission housing for them. The parts are in the archive "Metal gears conversion kit" in the folder "Modified gearbox from H2". You can find the assembly instructions for this transmission in the assembly instructions for the Hummer H2.
Non 3d-printed parts
(Click the name of the part to follow the link to aliexpress to buy)
My transmission is a bad quality, a link so that you understand where you don't need to buy! But you can fix them installing 3d printed housing that I designed and upload to Thingiverse here and here.
!!! For this gearbox with 3d printed housings you need additional bearings:
Cases for metal differentials
Differential case
front top metal
Differential case
front top metal
Differential case
rear top metal
Differential case
rear bottom metal
M3x12
M3x5
The screw closes the hole through which grease can be added without disassembling the entire part.
M3 nuts
G4513 Drive gear
10x15x4 bearings
8x16x5 bearings
P2951 Differential
6x12x4 bearing
(The seller sent me 6x11x4 bearings, so there are two versions of the cases in the archive. Don't mix it up!)
Printed parts
Metal transmission subframe
Center bearings bracket
Assembled differential cases
Center bearing bracket
If you have an old version of the frame and do not have the holes for this bracket, you need to position the bracket as shown in the photo and drill the holes with a 3mm drill. The bracket has a special design and you cannot position it incorrectly.
Then add bearings 5x10x4 and nuts M3 to the bracket. Then insert the 5x30mm shaft through the bearings.
M3x12
Transmission installation
M3x16
M3x6
M3x25 +M3 nut
Many manufacturers sell these gearboxes. Some of them may vary in size. Therefore, it is possible that this transmission subframe will not suit you, then write to me in the Facebook group or personal messages and I will make a subframe for you compatible with your gearbox.
58mm
There is very little space inside the model to install the transmission and motor, so make sure your transmission and motor do not exceed the dimensions below.
22mm
Drive shafts
The front drive shaft must be 68mm long. I did not find such drive shafts for 1/8 - 1/10 scale on sale, so I made it myself from 2 cardan joints and a 5x33mm metal shaft. Note that the differential input shaft is 6mm in diameter, so you need a universal joint with a 5-> 6mm transition. You can also drill the standard 5-> 5mm gimbal joint.
110mm
98mm
I used the rear drive shafts purchased, but you can make them in the same way as the front drive shaft. This will save you a lot of money. Note that on the rear differential, the input shaft is also 6mm in diameter, so if you are using a purchased drive shaft, you will have to drill one of its sides with a 6mm drill!
The metal gearbox is wider than the 3D printed gearbox, so after installing this gearbox in the frame, body installation became problematic. Therefore, I added with a soldering iron cutouts of about 8x40mm on both sides.
Also you need to print new exhaust main part.
They are different for 3d printed and metal gearboxes
exhaust for 3d printed gearbox
exhaust for metal transmission
The end
Traxxas T-maxx differential installation in the rear suspension subframe
M3x16
M3x16-25
M3 nut
M3x14
M3x14
M3 nut
The render shows a differential with two screws on the side, but there are also differentials with four screws on the market. They are also compatible with this part.
T-maxx diff subframe rear
T-maxx diff C-yoke rear
Traxxas T-maxx differential installation in the front suspension subframe
M3x10
M3x16-25
M3x14
M3x14
M3 nut
The render shows a differential with two screws on the side, but there are also differentials with four screws on the market. They are also compatible with this part.
T-maxx diff subframe front
T-maxx diff holding ring front
M3x10
M3x14 + nut�or M3x10 if you have differential with 4 screws as on image above