Builds 1998 FZJ70 Build (1 Viewer)

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They were on the bottom from the factory stacked like that.

Lift block or drop block.

Same/same
I understand what you are saying, but, now the axle is 1" further from the leaf spring creating a greater leverage on the leaf spring that could cause axle wrap. It is physics. It would be the same in a spring over axle and adding a lift block. You have now added a "block" between the axle and the leaf spring. In the stock location the "block" is simply a spacer. I would rather see shorter u-bolts and increase ground clearance. IMO it is a poor design to make up the space with "blocks" rather than shorter u-bolts. Also the squared off edges create a stress point for the spring and a good point to crack when flexed too much. Most spring perches are rounded on the edges to help with this, I know some Toyotas are not. I have studied leaf springs a lot and design/functiion of them.

Google search any of this and it will tell you the same thing. I do not want people to think it is "ok" without knowing the facts.

Rant over.
 
I understand what you are saying, but, now the axle is 1" further from the leaf spring creating a greater leverage on the leaf spring that could cause axle wrap. It is physics. It would be the same in a spring over axle and adding a lift block. You have now added a "block" between the axle and the leaf spring. In the stock location the "block" is simply a spacer. I would rather see shorter u-bolts and increase ground clearance. IMO it is a poor design to make up the space with "blocks" rather than shorter u-bolts. Also the squared off edges create a stress point for the spring and a good point to crack when flexed too much. Most spring perches are rounded on the edges to help with this, I know some Toyotas are not. I have studied leaf springs a lot and design/functiion of them.

Google search any of this and it will tell you the same thing. I do not want people to think it is "ok" without knowing the facts.

Rant over.
I think you are greatly overthinking this. You realize there is no difference whether the block is on the top or the bottom right?

Many OEM applications come with blocks. Look at any Tremor F250.

I understand axle wrap very well. I went through snapped pinions with poorly designed SOA's without track bars.
 
Ole girl got a fresh load of 15-40 with Zinc.

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Fresh coat of Fluid Film on this perfectly dry desert frame

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What engine oil you using? I’ve started using the T-5 since it supposedly has a higher zinc count compared to most others
For the 1FZ I use this.

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The F/2F/3F I use 20/50 Valvoline
 
Bloody nice so far. Very inspirational. I wish I could find a RHD one close to Australia.
Can I please get some more educationing about the Fluid Film? Its not too common here.
I havent seen it used in person, just online. I am looking at doing an underbody prep weekend on my FJ73 very soon (full flush, wash, seal)
 
Bloody nice so far. Very inspirational. I wish I could find a RHD one close to Australia.
Can I please get some more educationing about the Fluid Film? Its not too common here.
I havent seen it used in person, just online. I am looking at doing an underbody prep weekend on my FJ73 very soon (full flush, wash, seal)
It's a lanolin oil. Very good at creeping into tight spots. Does not hurt paint or rubber so you can spray it on everything under the truck.

I use it to protect from mud and grime since I don't have salt on the roads here

 
Does it smell funny?
 
Why are you using fluid film, since I would assume there is no road salt used there? I guess the wet climate is an adequate concern for frame rust to develop?
Also, do you anticipate using it on a yearly basis, or if not how often? Thanks.
 
Why are you using fluid film, since I would assume there is no road salt used there? I guess the wet climate is an adequate concern for frame rust to develop?
Also, do you anticipate using it on a yearly basis, or if not how often? Thanks.

It will make old cruiser frames look new after it soaks in. Dirt and mud fall off when you pressure wash it. Makes the old rubber refreshed. It soaks into places mud can hide.

Lots if info on it on you tube. The Yankees use it yearly.
 
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