4" lift - 33 tires questions

Hi,

Im looking at fitting 33" extreme Mud tires into my Jimny JB43 2016 (for some serious offroad, maybe a couple of times per month). I will probably use a normal MT or AT tires for daily use. I already have a 3" pro comp lift which I'll be looking to increase to 4" and I have an ARB rear dif lock.

I have 3 questions:

1. For the Caster corrected radius arms,  I saw some available in TrailGear for the JB74. Is there any chance that the original radius arms between the 2 Jimny versions (JB43 & JB74) are the same (because if so, these TG arms could probably fit the JB43)?

2. Should the caster corrected arms move the front axle to the front to allow for bigger tires?. I have seen a chinese manufacturer WMD that offers those arms, moving the front axle 50mm to the front.

3. For the new gears, my mechanic recommended the 4.56 differential gears. In other builds, I have seen that new gears are installed in the transfer case instead, for an increase in high and low gears (15% high and 104% low increases for example). My question is, should I look to install both? Do the transfer and differential gears "mutiply"each other? Is one better over the other?

Yes they multiply, the change in transfer ratios is more likely to make a difference in my opinion. 

I’ve just build a rock lobster for my SJ. That’s effectively halving the low ratio from 2:1 to 4:1 and a. 10% reduction in high range. 

wrote:

Hi,

Im looking at fitting 33" extreme Mud tires into my Jimny JB43 2016 (for some serious offroad, maybe a couple of times per month). I will probably use a normal MT or AT tires for daily use. I already have a 3" pro comp lift which I'll be looking to increase to 4" and I have an ARB rear dif lock.

1. For the Caster corrected radius arms,  I saw some available in TrailGear for the JB74. Is there any chance that the original radius arms between the 2 Jimny versions (JB43 & JB74) are the same (because if so, these TG arms could probably fit the JB43)?


 

The stock Gen 3 and Gen 4 radius arms are identical. Even the part numbers are the same

For castor arms Raymond Edwards (rhino ray)
he now makes adjustable ones with a rose joint at chassis end
gearing i would say fit an sj transfer box with sumo 6.4:1 reduction new gears
www.jimnybits.com/sj-samurai-suz-6-4-sp-...r-case-gear-set.html

Jack

Thank you! When you refer to "adjustable" do you mean the length? I have been able to find both arms that extend the original length effectively moving the front axle to the front (50mm) and normal length ones? Do you know if I should choose one or the other preferably for the 33"?

I have 32's using jimnybits +3" arms front and rear 
If you push your axle forwards by 50mm you will need to chop out the front panel near the body mounts
mine touches every now and then 
 I have ~3" suspension lift with a 1" body lift

 when you say extreme tyres are we talking special tracks because any thing with large tread lugs that stick out will catch everywhere 
what tyre size are you getting 33/9.5/15 also what wheel off set (ET)

I have 750r16 on 0 ET wheels 

Yes rays arms do extend on threaded rose joints 

personally i would buy jimnybits +4" arms and get the heavy duty props too
Then you will need HD front shafts and cv's the list is large and gets very expensive to make it reliable off roader