Here is what I bought
1 x KYOMA008 Kyosho 3-Speed Spur Gear $8.25
1 x KYOMA010 Kyosho 11T Sprocket $6.39
1 x KYOMA017 Kyosho Drive Chain $9.99
1 x KYOMA101 Kyosho Under Plate (EP) $7.29
1 x KYOMA103 Kyosho Main Gear Shaft $3.69
1 x KYOMA105 Kyosho Slipper Sheet $2.79
1 x KYOMA106 Kyosho Slipper Plate $4.59
1 x KYOMA108B Kyosho Center Bulkhead Set $8.25
1 x KYOMA201 Kyosho Slipper Collar & Wave Washer Set $5.49
1 x KYOTR41-42 Kyosho Spur Gear (42T) $2.79
1 x KYOMA071 Kyosho Sprocket Shaft $8.25
Plus you need to pick up the motor plate kyoma102... I only found one place online that carried them:
http://www.ultimatehobbies.com/store/KYOMA102!1012/MA102+MOTOR+MOUNT+TWIN
Call first for availability (thanks orange)
You will need 2: 6x12x4mm ball bearings
You will need 2: 8x16x5mm ball bearings
I purchased these from Boca Bearing or from ebay for a lot cheaper that the two pack that kyosho sells- actually I bought 10 of each for a whole lot cheaper.
This does not include any of the screws that you need to attach everything and I am not sure what you have from the nitro version that will cross over. It's actually a pretty easy setup. I am assuming that the nitro version has the output hubs ect, maybe the 3speed gear, chain ??? not sure... The one things that messed me up with the set screw for the main gear shaft collar- I think it's a 4mm set screw.
When it's all said and done you are looking between $70-80... I had a guy that regularly parts out mad force's on ebay quote me a complete transmission assembled for $86.50 shipped... Looking back I probably should have gone with him... I saved a little bit of money but it took forever getting the parts from three different places.
Once again I don't know what you have on your current setup that will relive cost but all the parts you can probably find pictures and figure it out. hope this helps!
Ohh here is the link to the exploded view
http://kyosho.com/jpn/support/instructionmanual/monster_truck/pdf/No30885_MADFORCE_KRUISER_VE_EX.pdf
Here's the link to the parts list via kyosho
http://kyosho.com/jpn/support/instructionmanual/monster_truck/pdf/No30885_MADFORCE_KRUISER_VE_SP.pdf