Thumper and Morrigan "Cheater" metal gear transmissions

!!!!!! It has come to my attention that not all 40T gears are the same. Some have a much bigger shoulder and are much thicker. I got mine on Amazon. link below. The wrong 40T has an option of a shaft up to 15mm, The cheaper version only goes up to a 10mm shaft. This is the one I am using  https://amzn.to/3vDLC9H or https://amzn.to/3UejRxY !!!!!!!

Thumper and Morrigan “Cheater” metal gear transmissions. 

These transmissions are for people that:

1. want to use a 540 motor. Brushed or (Fusion SE 1,200kv) 
2. want the greatest dependability. 
3. like to push the limits.
4. experiment with high rpm or 3s setups. 
5. don't have printers that can get the 0.1mm accuracy needed for the printed gears. 
6. are utilitarian, no nonsense 

The original transmission depends on printer accuracy. If the outer diameter of the gears are off by 0.2mm the belts will slip. These new transmissions use standard GT2 aluminum gears and belts making standard builds easier and more dependable. This also expands the possibilities in custom builds that use 540, 550 motors and or 3S batteries. 

Reasons not to use these cheater transmission: A2, A540, B2, B540 These transmissions only have two belts. Overall they have much less friction. This sounds good however less friction means more rollback on an incline. The original four belt printed gear transmissions combined with a simple D3530 motor actually work well and have very little rollback. These cheater transmissions back spin the motor fairly easy. However, if you use a Fusion SE 1,200kv motor/ESC the setup not only holds very well out of the box, the slow crawl is amazing. Or you can do some advanced programming to compensate for roll back. 

Note 1: None of the C or C2 transmissions are useful for rock crawling. 

Note 2: The Morrigan build requires replacing 019BodyCenterLower found in the bottom of this parts list. 

540 motors and 3S battery options:  

540 The Fusion Se 1200kv and the Spektrum 2 in 1 1400kv have been tested and work well with these transmissions. All other 540 setups- You are on your own. The brushed motors have been tested for fit only. 

3S Some builders have switched to 3S. At this time the models have not been altered  physically to accept 3S batteries. I have strong goals to properly fit the thin 168x47x25 3S battery in the Morrigan. (It is the long delayed Joker version of the Morrigan)  

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The A2 and A540 setups are designed for serious rock crawling. Top speed is a brisk walking speed. The A2 transmission is slightly higher ratio than the Original A transmission. The original A is (7.5 to 1).  The A2 and A540 are (6.25 to 1). The change in ratio is likely an improvement. The original A was a little too low range. (yellow Thumper) If using the Fusion SE 1,200kv I suggest B540

The B2 and B540 setups can still be used for crawling however give you some bashing speed. The green Morrigan in all the videos has always had a B transmission. The original B transmission is (5 to 1) The B2 and B540 are (4 to 1)

 The B540 transmission combined with the Fusion SE 1,200kv makes the ultimate Crawler with a plenty speed to celebrate a good crawl with a little bashing. (Why yes!! This is my favorite setup!) 

The C2 setup Basher! This is NOT a rock crawling setup. It is a fast, hard pulling workhorse. The original C is (1.86:1) This C2 is (2:1) This motor has been used on skateboards to move people. (Honestly it is a bit weak for skateboards.) I use this setup for bashing, chasing the dogs,  long distance nature walks and pulling my camera box and other equipment. The Glade Runner videos are recorded 1.2 miles down a nature trail. The "C" setup pulls the Glade Runner there and back every time without any trouble. _________________________________________________________________________________________________________________-----A2 Assembly video----

A2 - Crawler  Uses a D3530, D3536 or D3542  Flashhobby motors. Given the ratio, the D3530 1100kv flashhobby motor is recommended. Larger motors can be used yet you are not really gaining anything other than possibly lower motor temp. Lower kv is better unless you are ready to do extensive motor tuning. 

A2 Parts: 

Bearings: six - 5x11x4 / Gears: two - GT2 16 teeth 5mm bore 6mm wide / two - GT2 40 teeth 5mm bore 6mm wide / Belts: two GT2 116mm x 6mm wide / 5mm Rod - one - 64mm / one - 84mm 

Screws: six M3 nuts / six - M3 x 12mm / two - M3 x 20mm / two - M3 x 30mm / six- M2 x 10mm

M5 washers - (You can use regular washers or thin friction reduction washers)

M5 - 10 normal or 20 thin - count may very

__________________________________________________________________________________________________________________----A540 Assembly video----

A540 Crawler Uses 540, motors or Fusion SE 1200kv motor. The Fusion SE 1200kv or equivalent option is a pretty sweet option. (Fusion SE, Fusion SE Pro, Spektrum firma 2 in 1) Lower kv option suggested. The 540 brushed version is for people that know what they are doing.

A540 Parts: 

Bearings: five - 5x11x4 / Gears: one - GT2 16 teeth 5mm bore 6mm wide / *one GT2 16 teeth 3.175 bore / two - GT2 40 teeth 5mm bore 6mm wide / Belts: two GT2 116mm x 6mm wide / 5mm Rod - one - 64mm / one - 84mm 

* You can use a 5mm bore with 5mm to 3.175 sleeve adapter. 

Screws: six - M3 x 10mm / five - M3 x 16mm / six - M3 x 20mm / two - M3 x 30mm / six- M2 x 10mm

M5 washers - (You can use regular washers or thin friction reduction washers)

M5 - 10 normal or 20 thin - count may very

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----B2 Assembly video----

B2- Crawler Basher  Uses D3536 or D3542 Flashhobby motors. The D3542 1000kv is recommended. Higher than 1200 kv options will require motor tuning. 

B2 Parts: 

Bearings: five - 5x11x4 / one - 16x28x7 / Gears:  two - GT2 20 teeth 5mm bore 6mm wide / two - GT2 40teeth 5mm bore 6mm wide / Belts: two GT2 116mm x 6mm wide / 5mm Rod:  one - 64mm / one - 84mm 

Screws: six M3 nuts / six - M3 x 12mm / two - M3 x 20mm / two - M3 x 30mm / six- M2 x 10mm

M5 washers - (You can use regular washers or thin friction reduction washers)

M5 - 10 normal or 20 thin - count may very

__________________________________________________________________________________________________________________

----B540 Assembly video----

B540 Crawler Basher  Uses 540, motors or Fusion SE 1200kv motor. The Fusion SE 1200kv or equivalent option is a pretty sweet option. (Fusion SE, Fusion SE Pro, Spektrum firma 2 in 1) Lower kv option suggested. The 540 brushed version is for people that know what they are doing.

B540 Parts:

Bearings: five - 5x11x4 / Gears:  one - GT2 20 teeth 5mm bore / *one - GT2 20 teeth 3.175mm bore 6mm wide /two - GT2 40teeth 5mm bore 6 mm wide / Belts: two GT2 116mm x 6mm wide / 5mm Rod:  one - 64mm / one - 84mm 

* You can use a 5mm bore with 5mm to 3.175 sleeve adapter. 

Screws: six - M3 x 10mm / five - M3 x 16mm / six - M3 x 20mm / two - M3 x 30mm / six- M2 x 10mm

M5 washers - (You can use regular washers or thin friction reduction washers)

M5 - 10 normal or 20 thin - count may very

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----C2 Assembly Video----

Coming Soon !!

C2- Basher Uses 4250 Hobbyhh 800kv motor. 2:1 

Bearings: six - 5x11x4 / Gears: three - GT2 20 teeth 5mm bore 6 mm wide / one - GT2 40 teeth 5mm bore 6mm wide / Belts: one - GT2 116mm x 6mm wide / one - GT2 94mm x 6mm wide / 5mm Rod: one 64mm / one 84mm 

M5 washers - (You can use regular washers or thin friction reduction washers)

M5 - 10 normal or 20 thin - count may very

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A2 - use parts that start with A2

A540 - use parts that start with A540

B2 - use part that start with B2

B540 - use parts that start with B540 

C2 - use parts that start with C2

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Links are US Amazon Affiliates  

Motors:

A540 or B540 - Fusion SE 1,200kv motor https://amzn.to/4cLEMQ9 No ESC needed

A2 - Flash Hobby D3530 1100kv  https://amzn.to/4aH3ob2 use 30 amp ESC

A2 or B2 Flash Hobby D3542 1000kv  https://amzn.to/4cUZD3m use 30-60amp ESC

C2 -  4250 800kv  https://amzn.to/4aMfXSc use 80 amp ESC 

ESC: 

30amp QuicRun - https://amzn.to/3UdZ7q7  

60amp QuicRun - https://amzn.to/49yDPYo 

80amp GoolRC - https://amzn.to/3VNqcBA 

Gears:

40T and 20T combo 5mm bore - https://amzn.to/3UejRxY 

40T 5mm bore - https://amzn.to/3vDLC9H 

20T 5mm bore  - https://amzn.to/43U1dOS 

16T - https://amzn.to/4awIxr2 

5mm to 3.175 for A540 or B540  https://amzn.to/3Uc1Tfl 

Belts:

GT2  6mm x  116mm https://amzn.to/4cRHALu 

GT2  6mm x  94mm https://amzn.to/3WSLFJS 

Bearings:

5x11x4 - https://amzn.to/3VTBK68 

16x28x7- https://amzn.to/3xyGzYJ 

5mm rod - https://amzn.to/3xxcDfp 

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Update: June 3- 2024 Transfer Case has been updated to except to slightly larger 40T gear. (Shoulder from 17mm to 19mm)