Converting from 3.15 to 3.xx

[Performance nut]

I saw a thread about converting from 3.55 to 3.15. @80FoxCoupe pointed out that the housing is the same, the differential is different. With that in mind, this looks like you can swap everything or a few components. To make things simple for the swap, I have a question about what parts I will need if I don't want to swap everything. Some of these are Ford parts, I'm likely going to run other manufacturer parts. Just wanted to see if I have the right things included. If I am, could you let me know what I'm missing?

• FR3Z-4205-B with an aftermarket differential OR FR3Z-4026-B, FR3Z-4026-C, or FR3Z-4026-E
  
• [URL='https://parts.autonationfordwhitebearlake.com/oem-parts/ford-ring-and-pinion-fr3z4209b?c=Zz11bml2ZXJzYWxzLWFuZC1yZWFyLWF4bGUmcz1kaWZmZXJlbnRpYWwmbD0xOCZuPUFzc2VtYmxpZXMgUGFnZSZhPWZvcmQmbz1tdXN0YW5nJnk9MjAxOCZ0PWd0JmU9NS0wbC12OC1nYXM%3D']FR3Z-4209-B, FR3Z-4209-C[/URL], or JL1Z-4209-A

I also have a question about FR3Z-4026-E. Is the differential cooler worth it?

Sponsored