I have a FJ-55 with a 3 inch lift. it is sua and has 33" bfg's on it now. In my neverending quest for bigger tires i have decided to go for the gold and put 40's under it. In my other thread, i had mentioned my plan to use a D44 and GM 12 bolt soa to fit 40" MIchelins under my 55. The overwhelming consensus was that this was not a very good plan as the stock toyota axles would probably do better than the swapins. So my question is with disregard to the body (ie: cutting is ok, even if the rear doors are impacted somewhat) what is the best way to fit these tires under the rig? New axles? Would keeping the stock axles make it to narrow and therefore tippy? What are your ides/suggestions? PS: the cheaper the cost the better. Thank you for you time and support.

SOA, will get you heaps of lift, maybe even too much, especially if you already have 3" lift, id put wider diffs in, maybe shell some $$$ on lockers!?!?! and winch and other bits and pieces

it will not turn real well with standard 55 series diff, leaf springs, and big tyres, best to get a wider diff

fullwidth 44....maybe, you'd want alloy axles and CTMs, or maybe, a 60/70 combo?!

What do you mean by "wider diffs"?
PS: what are you running? (with the 42's)

For 40" tires, I'd go full width 1 ton axles. The cheapest might be
a D60/14 bolt combo. You should be able to buy at set for less than 2,000 dollars. I think your 55 would be very tippy with 40" tires and a big lift.

Charles

If you have no respect for the body I'd cut the roof off too, something similar to this, that will reduce roll considerably and if you are going to be that tall I don't think I would trust the roof in a roll anyways. Here's a good example of a 55 with the roof off (http://www.4x4labs.com/rigs/sand_spider/index.html). From there, I would probably do as they say, pick up a dirt cheap wrecked full size Chevy or Dodge with 1 ton axles and throw those under. If you find a '88 or earlier Chevy 350 with 4 speed (that will have a shift lever where 1st gear is indicated by a "L" for low), then you also have your transfer case and a SM465. Sometimes these trucks can be purchased in god aweful condition for as little as $500 if you are lucky. Maybe start there!

Im a dummy, and a little partial to Toyota stuff, But I would use an FJ-60 axle in the rear, as they are wider, and a D-60 up front. Either that or an Fj-60 axle in the front as well, with the Dana 60 outers.

Cheers
Tyler

FJ60 axles are only like 2 inches wider. Not wide enough with the 40" tires. Forget the Toyota axles ang go with 1 ton. It will cost you more to make a FJ60 front axle with D60 outers than to buy a D60 front. Also, the pinion and axle shaft of Land Cruiser axles are the weak link.

Build it once and build it right.

Originally posted by fj40charles
Build it once and build it right.

Right under the quote is:

'69 FJ40, 350 TBI, RC D60's, Atlas, TH400, custom 4 link coilovers, 42" tires and longer wheelbasein the works..

OK... everyone repeat after me.... do as I say, not as I do.... :flipoff2:

Tom :usa:

Tom,

Already have the RC D60 axles made. Just waiting for them to get installed...:flipoff2:

Do it right.... Do it yourself... I wish I had the loot to have somebody build my truck for me... Im not bashin you, Im just jeleous!

Cheers
Tyler