why aren't 2-speed trannys recommended for off-road?
03-18-2002, 01:55 PM
#2
When jumping or spinning the tires having a two speed just causes more wear and tear on the motor and drive train as they are currently shifting back and forth as the car is in the air or the tires are spinning on the dirt. Just a lot toughe on your equipment and not really needed in offroad.
03-19-2002, 03:53 PM
#4
Tech Initiate
2 Speed is for speed
Well i think 2 speed is for speed hence making it a onroad setup i wanted to put a 2 speed on my hpi mt but i dont htink its worth 100 dollars. Well i live in canada so i dont know the prisce in america. And when you are offroad you would want to be on fist gear so u can climb easy. But 2 speed sounds kool when it clicks in. So thanks for reading
03-20-2002, 06:58 AM
#5
actually, i got my mt 2nd hand for 250 sgd which is about $140 USD inclusive of transmitter and electrics which i felt was a pretty good deal and the truck is in nice cond as well with some extras. now i got to find the original spur which didn't come with the kit.
03-21-2002, 05:54 AM
#6
Tech Adept
for the MT its like 60
03-21-2002, 07:09 AM
#7
i saw this thread about the reason for not using 2-speed offroad. now i'm confused. so which is correct. strain on the 1 way differential or simply dirt entering the 1 way diff?
http://www.hpiracing.com/rcforum/sho...threadid=25274
http://www.hpiracing.com/rcforum/sho...threadid=25274
03-21-2002, 08:46 AM
#8
There are a lot of reasons not to use a 2 speed in offroad:
#1 They are illegal for organized offroad racing (ROAR/IFMAR).
#2 As mentioned above, the shifting puts a lot of strain on the rest of the drive line. Generaly are only installed on 4wd cars because the load is spread out between all 4 wheels.
#3 Durability, they don't hold up well in the dirt. In offroad they would be shifting more often than onroad because you are on and off the throttle so much more.
#4 The car would be hard to jump. It would shift in the air and upset the flight of the car and you wouldn't have the ability to hit the brakes in the air to bring the nose down because of the one-way.
#1 They are illegal for organized offroad racing (ROAR/IFMAR).
#2 As mentioned above, the shifting puts a lot of strain on the rest of the drive line. Generaly are only installed on 4wd cars because the load is spread out between all 4 wheels.
#3 Durability, they don't hold up well in the dirt. In offroad they would be shifting more often than onroad because you are on and off the throttle so much more.
#4 The car would be hard to jump. It would shift in the air and upset the flight of the car and you wouldn't have the ability to hit the brakes in the air to bring the nose down because of the one-way.
03-21-2002, 12:14 PM
#9
Tech Rookie
I have to agree with the wear & tear comments. I have a Thundertiger SSR rally car with 2 speed installed. If I go racing on loose surface venues I tend to get small rocks stuck in the spur gears. Obviously as there are 2 gears it means twice the price when it comes to having to replace them ;-( Also as others have already said the wheels spin and the 2 speed kicks in when you do not want it too. I have also found that on loose gravel surfaces you can come out of a bend onto a straight and punch the throttle full open the 2 speed kicks in straight away and you end up spinning the car on a straight section. 2 speed kicks a$$ but only on the paved circuits where you can get good traction.
03-28-2002, 09:01 AM
#10
Actually, in addition to the above statements, the one-way bearing would not last long in off-road conditions. Dirt would eat it up poste haste.
03-21-2013, 10:38 AM
#13
AWESOME ! FREAKING AWESOME ! 
03-21-2013, 11:02 AM
#14
PB Mustang + Schumacher CAT
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