Tech Article: How to put 60 series axles under a 40 or 55 series

[Mikesta]

Thanks, read it again and caught that. Takes a while to get stuff to sink into brain.

 

[lcwizard]

or just move the knuckles out and while you're at it add some caster and longfields

 

[mano002]

I will be getting a 60 series front end here shortly, but I don't really want to outboard my springs. Does anyone have any pictures of doing this any other way? I will be SOA, so I can mount it with the lift block type mount if that's the only option, but I'd rather not add more lift, since I have a rock-catcher SR kit already mounted.

I guess this could be the excuse I need to cut off the SR kit.

 

[Cruiserdrew]

or just move the knuckles out and while you're at it add some caster and longfields

Could those spacers be used to widen both sides of an FJ60 axle?

If so, is there availability of a longer cromo axle to use with 30 spline Longs?

Would it be cheaper and easier just to swap to a D60?

That looks like stage 2 of my FJ60 SOA!

 

[bustanutley]

I will be getting a 60 series front end here shortly, but I don't really want to outboard my springs. Does anyone have any pictures of doing this any other way? I will be SOA, so I can mount it with the lift block type mount if that's the only option, but I'd rather not add more lift, since I have a rock-catcher SR kit already mounted.

I guess this could be the excuse I need to cut off the SR kit.

notch the diff area
get rid of that ridiculous kit

or use one of lcwizard's spacers
but definitely get rid of that kit

 

[72cruiser]

Could those spacers be used to widen both sides of an FJ60 axle?

If so, is there availability of a longer cromo axle to use with 30 spline Longs?

Would it be cheaper and easier just to swap to a D60?

That looks like stage 2 of my FJ60 SOA!

hey cruiserdrew,

that last image he posted is a 60series front with spacers on both sides and if you check out the earlier posts about the spacers he gives the info about the special order longs...

hope this helps,
malphrus

 

[dieselcruiserhead]

Those spacers are cool/interesting/unique... What shafts do you use?

 

[cruiseroutfit]

Somebody on Pirate did a spacer years ago. A shaft should be no harder than a call to Longfield or Poly, or a custom machine shop (Summit in Utah does shafts). Dutchman, Williams and others?

 

[72cruiser]

oops...sorry y'all, got mixed up on what particular 60axle thread this was.


here is a great reference for information on the spacers and longs that lcwizard posted up about:
https://forum.ih8mud.com/hardcore-corner/196544-notched-60-front-axles.html


malphrus

 

[Alexr88]

I might be off the topic but this thread was the closest I could find.

Is anybody using 80 series axels on a fj40 with leaf springs on a SOA? Any info/pictures would be helpful.

 

[72cruiser]

I might be off the topic but this thread was the closest I could find.

Is anybody using 80 series axels on a fj40 with leaf springs on a SOA? Any info/pictures would be helpful.

there was a guy a while back that did something like that, i'll try and dig up a link for you

 

[Cruiserdrew]

I might be off the topic but this thread was the closest I could find.

Is anybody using 80 series axels on a fj40 with leaf springs on a SOA? Any info/pictures would be helpful.

Surprisingly, the search function is quite healthy:

https://forum.ih8mud.com/40-55-series-tech/181289-fj80-axles-under-my-fj40.html

 

[72cruiser]

I might be off the topic but this thread was the closest I could find.

Is anybody using 80 series axels on a fj40 with leaf springs on a SOA? Any info/pictures would be helpful.

hmmm, this is what i found:

https://forum.ih8mud.com/hardcore-corner/142665-fj40-gettin-fj-80-axle-treatment.html


think of it what you will, not my build.


malphrus

 

[rideglobally]

what about vibration or other negative issues

thanks for this great information. i am gonna put an 80 series axel on my hj 47 my question is regarding vibration. my rig is not for the trail it will be mostly on freeways and bumpy road. there is an off set on the driveshaft going from the pumpkin to the transmission will this cause vibration at 75 MPH on the freeway. any experience with this? are there any negative issue in doing this? if there is what is the remedy? my rig is wide and i want to widen my track to increase stability. you can look at my album below if you want to see my rig. thanks

 

[Mikesta]

ttt for simplicity sake.

 

[General Sherman]

I notched the housing and use one of these"

FJ40 / FJ60 Diff Cut Spring Perch

Works great and can run 40's without rubbing leaf springs.

 

[nogo]

.

 

[KY Longhunter]

Looking for opinions on FJ40 project.

I've got a '79 FJ40 frame and Axle Housings, no springs or diffs. I just found an '87 FJ60 donor with Complete Axles and complete running 2F. Was going to swap 2F, 4 speed, split case and Thirds from FJ60, but thinking of just swapping entire rear axle.

How hard is the swap? Is it worth the work if I'm not going bigger than 33x10.50's?

 

[cruiserinsanity]

In the front, as these guys are saying, simply use a 40 series axle housing. That is -- if you don't want to go through the hassle of what is discussed in this article. They are all interchangable from I believe '69 and up, all diffs, knuckles etc are all interchangable. Then use all of your steering, disk brake, 3rd member with the cable lockers, etc bolted to the 40 series axle. Otherwise, you will have to widen your spring hangers as discussed in this article. It took me about 2-3 nights to successfully do but that was with lots and lots of measuring as well... Then either use 1 or 1.5" wheel spacers in the front to have them match, or don't use wheel spacers at all and have the extra width in the rear only. It sounds corny but I know a few guys who run this (mostly to have 60 series full floats in the rear) and it works fine and doesn't look to odd at all, in fact barely noticable..

Does anyone happen to have a picture of a truck setup like this? 60 axle in the back with stock width 40/55 axle in the front

 

[cruisermatt]

Does anyone happen to have a picture of a truck setup like this? 60 axle in the back with stock width 40/55 axle in the front

It just looks like a regular 40 with 1.5” wheel spacers on the rear.