Finally Caved
I have chewed up the outside edges. 4 Wheel Parts said they could not do anything. I was in disbelief, they have been real good for everything else.
I found shops that would go out of Ford specs on the alignment, but they could not lift the truck. Finally Coppell Tire and Auto knew exactly what I wanted done, told me about the kit and quoted $120 installed with alignment. I will see if that is still true at the end of the day Saturday.
I also am getting a fabtech 6in lift for the front for 665 delivered w/o the shocks so I also need help picking out some shocks.
And lastly toreador the 315's are on stock rims I see, did you have to get a spacer or do you have that much clearance with the 6in kit?
I too need just a front kit, I have some 4x4 X leafs already and want to just throw those on and will just get the right block after that to put it where I want it.
Ford Trucks for Ford Truck Enthusiasts
Been lurking for awhile, just finally decided to sign up! This is the best thread yet though..
Can't wait till I finally get my lift done and build my roof rack and stuff.
I'll have to post pictures of the motorcycle carrier I built for the back. I can carry 2 sportbikes on the back of my Ex..
This weekend I will tighten the steering box a bit.
It is really a difference what the correct footprint can do for the handling.

The Good:
When I first put it into gear and tipped the pedal it jumped forward, really wanting to go. (I hadn't even driven anywhere and I was already impressed.) Driving around town, the tranny shifted so smooth and crisp it was like I had a new truck. Once I got on the freeway, I was blown away as to how much easier my truck accelerated to 65. On certain hills that would work my turbo until it started to flutter, it would barely use the turbo. With the 4.30s, all I would hear is the sweet, but quiet whistle of my turbo yawning at whatever I threw at it. Mileage wise, I did see a promising increase the overhead lie-o-meter said 16.2 mpg instead of it's usual 14.0 mpg or less. I had to pace myself for the first 100 miles per the shop, but once that was over I mashed it from a dead stop and was a quarter mile down the road before I knew it.
The Bad:
The only thing I noticed that bothered me was that my RPMs were much higher than stock and my truck was really getting up there (and staying up there) just to shift sometimes. I also noticed that I didn't have much passing power or any real power up top. My truck was turning 3100-3300 rpms, just to pass someone and really get down the road from 45 to 65. (even then it wasn't going too far, too fast) I thought I needed a new, custom chip and upon talking to a few reputable, independent, well known sources (Well-Respected FTE vendors), I was told that I had made an $1100 mistake. In other words, I had over compensated for my tires and my application. If I had 37 inch tires, 4.30s would've been perfect for what I was looking to accomplish. Another $750 later, I found that they were dead on right and everything is as it was before I lifted my truck; with 4.10 gears installed, my rpms are where they should be 65mph=1900rpms, 70mph=2000rpms, 75mph=2150rpms, and so on. My power and mileage has also recovered to stock levels, i.e. 18.6 mpg. We'll see just how good it gets as time goes on, but things are looking better already. I had convinced myself that 4.30s were the way to go given the rolling resistance and a few other factors mentioned. But I didn't think it was going to make that much of a difference between the 4.30s and the 4.10s. The power of the 4.30s was awesome, it truly was, but it was overkill for trying to recover my fuel economy. My expensive loss can now be a V10 owner's gain; the gears alone cost me $450, so they're currently for sale in the classifieds section for $350 obo. From what the guys at the shop said, these are high-quality, premium gears that will last a lifetime, so if you're interested, check out the ad.
https://www.ford-trucks.com/classifi...9683/cat/last7
The new gears would change the shift points some and make it react differently until it 'learns' new shift points. I understand diesels do better at low to mid rpms, not high end as gassers but i would never have guessed it would be too much as many run 4.30s with stock tires...almost sounds as something was amiss, like torque converter not locking or something.
I only lead you astray from your initial feelings cuz I did not want you to be upset without much change...should be easy to sell gears for partial recovery...
The new gears would change the shift points some and make it react differently until it 'learns' new shift points. I understand diesels do better at low to mid rpms, not high end as gassers but i would never have guessed it would be too much as many run 4.30s with stock tires...almost sounds as something was amiss, like torque converter not locking or something.
I only lead you astray from your initial feelings cuz I did not want you to be upset without much change...should be easy to sell gears for partial recovery...

It did indeed made the truck more powerful as well as less powerful. Everything locked up the way it should have and truck drove the way it should, but it was doing it at much higher rpms. The power was there in town, but on the freeway it was seriously lacking. The truck didn't work as hard, but having to maintain 2200 to 2400 rpms on the freeway to keep up with everybody else, is too much for a diesel and doesn't leave room for much else. If I had a V10, I'd still be driving around with a BSEG on my face.
I took the shift points and the fact that the trans had to relearn things into consideration. Thats why I de-tuned and re-turned my truck the day after I got it back. After some driving, it quickly relearned things and things came together, but not enough to justify keeping the 4.30s.To be honest, the small change is what made the most difference. Something I did was see what the avg. mpg readout would be as I was driving around town. Around town at 45mph with the 4.30s it was about 15-15.5, with the 4.10s it was 16.6 and climbing. The true test came when I did alot of stop and go driving and then hit the freeway cruising at 65. With some easy driving at 1900 rpms the overhead read 18.6 whereas with the 4.30s it could barely maintain 16.5. Mind you, between 1900 and 2100 rpms, my truck could really get down the road, but I'd soon have to fill up. With the 4.10s, I'm getting the best of both worlds: power and economy.








