different differential gear ratios

[sambmx]

Does anybody run a shafty with different ratios in their differentials? Ive been wanting to try to have a higher gear ratio in the front than the rear ( so the front tire turns faster than the rear) to try to create a pulling effect so as the truck climbs a ledge it keeps the front planted and pulls it over the top. I think someone around here runs this in there clod (Grizz i think). And are different pinnions/ring gears avalable for maxx differentals?

Anyone whos has/tryed this how did it work out? Thanks.

 

[Jneves]

I havent tested this in the RC world but this seems to be an Urban myth of 1:1 4wheelers... and I'm gonna make an assumption and say if it doesnt work in fullsize rigs it wont work so well in the RC world (and yes I've seen it in a fullsize rig and it doesnt help!)

 

[SR5Dave]

It works with a clod because there is nothing mechanical to bind. Also, the reason Griz does it is to stop motor stall on a clod... not a problem on an e-maxx.

 

[Jneves]

It works with a clod because there is nothing mechanical to bind. Also, the reason Griz does it is to stop motor stall on a clod... not a problem on an e-maxx.

exactly if the front and rear are mechanicly connected and have different ratios this means it will always be in a bind, so for the vehicle to move one end will always be spinning the tires (meaning constant broken traction)

 

[fullmodtxt]

Hi guys! This is an old mud bogging trick. Sometimes the axles ran the same R+P with different hieght tires to do it. The theory was kinda as mentioned here, it kept the front pulling so it was "light" over the mud (not planted). Now remember, a tire cannot be planted if it is spinning w/o traction. If you have 2 different ratios, it would theoretically force one end to spin or turn slower than the other; therefore forcing one axle to actually lose traction on a hard surface.
This wouldn't be a problem in mud because of the lack of traction. Like said before, nothing to bind between Clod axles. I don't think that there is a way to run different ratios in most shaftie diffs anyhow, is there? I know that Maxx and TXT/Jugg diffs are set permanently at thier own ratio. Wouldn't twin/mad force and x-factors be the same way?

 

[SR5Dave]

I don't think that there is a way to run different ratios in most shaftie diffs anyhow, is there? I know that Maxx and TXT/Jugg diffs are set permanently at thier own ratio. Wouldn't twin/mad force and x-factors be the same way?

Maybe with a limited slip center diff?

 

[sambmx]

The limited slip would deffenantly solve the binding, im wanting to try this now i just wish they had the parts. The way i figue it helping is when the rig is near or at vertical it will stop it from fliping backwards as the front tires ride over the top of the ledge.

 

[Grizzly4x4]

I know that Toyo used to swap an MGT pinion into a TXT axle. So there is some possibility for swaps but I think they both had the same number of teeth.
The real problems are like said before, drivetrain bind and one set of tires being forced to slip. It works in a clod because there is no mechanical link between the front and rear axle (like Dave said).

However, if you had a motor and a tranny for each axle........you could have a Clod with driveshafts. I am planning to do this on a shafty and I saw it done on Kaetwo's TLT. :twisted: