Front Axle Forward

[Glenn-BJ74]

After reviewing various posts I see 74 owner have moved their front axles forward different distances.

25.4 mm (1")
30 mm
40 mm

So which works the best? What is too far

 

[Radd Cruisers]

I'm about to consider this one too... I can let you know what I come up with after I've done it. I am looking for about 25 to 30 mm of movement forward.

The reason I'm going to move things forward is to provide a little more tire clearance at the rear edge of the fender/mud flap.

The limiting factors are going to be steering linkage angles and interference along with keeping things on the flat section of the OME springs. If too far forward, the shock angle may affect thing as well.

I am planning on doing it by drilling a new set of holes in the perch and u-bolt plates.


~John

 

[Gib009]

I moved mine forward 25mm. My steering arms rub slightly (just nicks the dirt of each other) but nothing to worry about- so i wouldnt go any further than this. But people have moved theres like you said 40mm + and not had a problem. Not sure if its a model specific thing it would be interesting to find out.

 

[Glenn-BJ74]

My understand is the limiting factor on the 74s is interference of the steering arms. Sounds like 25 mm is maximum on your BJ71. I see others have done 30 mm (possibly 40 mm), but I would like hear from the experienced ones.

 

[boogie74]

I did 25mm on my front diff. The nut on the tie rod clamp on the steering relay was touching the drag link so I rotated it to stop in contacting. I don't think I could go anymore than 25mm on mine.

 

[Malahki]

I move mine ahead 30mm and as mentioned by boogie74 also had to rotate the clamp. I have not experienced any rubbing issues. To see pics of it being moved ahead go here https://forum.ih8mud.com/70-series-tech/286801-canadian-build-jdm-bj74.html

 

[crushers]

i have done this on a number of 70 series now and i stick with 1" with a max of 1 1/4", with this you can run 35 fats with no rubbing on the fender corner.
i also run 36 tractors with no rubbing on the corner this way.

 

[Gib009]

Just to note there was somone who moved his front axle forward 4inchs by flipping the springs and redrilling the perches. I tried this and it didnt work for me but it apparently works fine on his BJ70. Here is a link

GUDeano's BJ70 Build - DownUnder4x4

 

[Glenn-BJ74]

Thanks guys - sounds like 30 mm is the answer.

 

[Hulsty]

I moved the one on my red car 40mm forward, on the red car its about 30mm forward could move it further too.

Problems I have are with bigger tyres, they will start to rub on the fronts of the inner guards if you run big rubber and flexy suspension and lots of offset. Had trouble hitting the body mounts too.

 

[Glenn-BJ74]

Where you have these problems at 30 mm or 40 mm?

 

[Hulsty]

Both.

 

[ForealBoreal]

john what did you find out from your testing?
is it 30mms from the center of each hole or edge to edge?