Success story, I just did the LED Upgrade in my 07 sport trac's cluster.
With the white face gauges plus 1 blown and weak bulbs inside it was only readable in absolute darkness. Driving around sunset, it was impossible to read. I wish I'd taken before photos but here's how it's looking on the brightest setting. There are no hotspots and it is very readable in any type of light where backlighting is necessary. With the dimmer, they work as intended. The dimmest setting with these LEDs is as bright as my OEM bulbs.
There are plenty of guides and videos that tell you how to take your gauge cluster out to remove the bulbs. I used the part B8.4D-NWHP from superbrightleds.com. They fit in the cluster but are a bit loose. You have to bend the top tabs on the light-making side to close the gap toward the tabs on the plastic side. Compare against your original bulb to get the spacing right. If they don't glow on first try, rotate bulb 180 degrees and try again. I got lucky and only had to do that 1 out 4 times.
With the white face gauges plus 1 blown and weak bulbs inside it was only readable in absolute darkness. Driving around sunset, it was impossible to read. I wish I'd taken before photos but here's how it's looking on the brightest setting. There are no hotspots and it is very readable in any type of light where backlighting is necessary. With the dimmer, they work as intended. The dimmest setting with these LEDs is as bright as my OEM bulbs.
There are plenty of guides and videos that tell you how to take your gauge cluster out to remove the bulbs. I used the part B8.4D-NWHP from superbrightleds.com. They fit in the cluster but are a bit loose. You have to bend the top tabs on the light-making side to close the gap toward the tabs on the plastic side. Compare against your original bulb to get the spacing right. If they don't glow on first try, rotate bulb 180 degrees and try again. I got lucky and only had to do that 1 out 4 times.