Axle extenstion sleeve (2 Viewers)

[Firemedic831]

X2 Never a issue

 

[matzell]

I am planning to stretch Lynchburg Lemonade to match my stretched40. I want to get the suspension sorted out and the width. Once I am happy with it, I can copy it to the stretched40 build. Axles may or may not be the same. I have 40's, 60's, 80's and narrowed tons 64.5"/63" F/R that can all work.

 

[White Stripe]

meh. ive not had any trunion issues with the ifs hubs. run a heavier offset wheel and it's a non issue. death wobble is almost 100% tires or incorrect caster.

Well another factor is what your wheel backspacing is. If you have 5" or so of backspacing then it counter balances the ifs hub.

 

[gnob]

Well another factor is what your wheel backspacing is. If you have 5" or so of backspacing then it counter balances the ifs hub.

almost everything is 4.5 or better these days anyway.

from what I've seen trunion issues are generally abuse or lack of maintenance as well. arb studs, loctite and proper torque go a long way.

 

[Firemedic831]

ARP Studs Check Locktite Check Torqued Check IFS wheel Hubs Check 40 inch Tires Check one thing i do run 25 mm trunions I think i have been through the Rubicon now 6 times with this rig and twice up Fordyce So far so good will report back after this next year

 

[White Stripe]

I've done some reading on this and understand the reason for widening the short side for keeping spring center distance @ OE specs on a 40 serie. What I don't quite understand is why 2-5/8" was landed on? Is it just the minimum required distance to achieve the goal? Both FJ40 and FJ60 inner passenger shafts are ~17.25" long. Adding a 2-5/8" sleeve means you need an ~19.875" custom inner axle shaft on the passenger side, that length doesn't coincide with any other factory length shaft that I am aware of. Trailgear does offer a +5 inner axle shaft at 19.4375", which I suspect would work just fine, not sure if it was on the market when these sleeves started coming about though.

I think that 19.4 shaft is what I used for mine.

 

[White Stripe]

ARP Studs Check Locktite Check Torqued Check IFS wheel Hubs Check 40 inch Tires Check one thing i do run 25 mm trunions I think i have been through the Rubicon now 6 times with this rig and twice up Fordyce So far so good will report back after this next year

What made you go with the 25mm rather than the trunion eliminator kit?

 

[Firemedic831]

What made you go with the 25mm rather than the trunion eliminator kit?

My steering arms are Diamond Keyed arms and they use the 25mm . also my lower caps .

 

[cruisermatt]

I've done some reading on this and understand the reason for widening the short side for keeping spring center distance @ OE specs on a 40 serie. What I don't quite understand is why 2-5/8" was landed on? Is it just the minimum required distance to achieve the goal? Both FJ40 and FJ60 inner passenger shafts are ~17.25" long. Adding a 2-5/8" sleeve means you need an ~19.875" custom inner axle shaft on the passenger side, that length doesn't coincide with any other factory length shaft that I am aware of. Trailgear does offer a +5 inner axle shaft at 19.4375", which I suspect would work just fine, not sure if it was on the market when these sleeves started coming about though.

From what I understand the big reason most guys widen just the passenger side is actually to install a FJ60 axle in a 40 without outboarding the springs, but keep the spring perch on the round part of the axle tube. If you think about it just widening the one side will push the diff towards the center of the rig so you don't want to go too far otherwise driveshaft starts to get very crooked
A lot of the old school 40 guys I grew up around run this setup like @Sputnik40

 

[too tall]

From what I understand the big reason most guys widen just the passenger side is actually to install a FJ60 axle in a 40 without outboarding the springs, but keep the spring perch on the round part of the axle tube. If you think about it just widening the one side will push the diff towards the center of the rig so you don't want to go too far otherwise driveshaft starts to get very crooked
A lot of the old school 40 guys I grew up around run this setup like @Sputnik40

This and it allows you to run 40's with leaf springs and still turn lock to lock without rubbing. Mine has been like that for years .

 

[White Stripe]

My steering arms are Diamond Keyed arms and they use the 25mm . also my lower caps .

I saw the weight rating for the 25mm. It seems like it's quite a lot better load handling wise.