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ST/RS Fords
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<blockquote data-quote="B7BlownSnake" data-source="post: 16733641" data-attributes="member: 112096"><p>There were a few 2020s that had transmission issues, but like anything, the issue is usually overblown. Most of the issues you heard about 2020 models (flex pipe issues, back-up camera issues, etc) were fixed by 2021.</p><p></p><p>There are many many people running E50 tunes (and more getting E85 as a solid fuel pump upgrade back available recently) and nothing more, and going mid 11s with no issues. The 3.0 should be pretty stout.</p><p></p><p>The car uses to 10R60, so if you go beyond the E50/E85 and get upgraded turbos, you will need a transmission rebuild.</p><p></p><p>One issues that has popped up on 2021 builds is a change to the rear subframe. There used to be 4 bolts holding the diff (2 front, 2 in the back) and now there are 3 (only 1 in the back). There has been some failures of that bolt (which leads to lots of other damage), but it's been guys with E50 tunes (note, and E50 tune is going from roughly 350awhp/400 awtq stock to 520 awhp/540 awtq) launching their cars. Some people have had it replaced with the 4 bolt subframe, but there is a diff support bracket available to help the issue.</p></blockquote><p></p>
[QUOTE="B7BlownSnake, post: 16733641, member: 112096"] There were a few 2020s that had transmission issues, but like anything, the issue is usually overblown. Most of the issues you heard about 2020 models (flex pipe issues, back-up camera issues, etc) were fixed by 2021. There are many many people running E50 tunes (and more getting E85 as a solid fuel pump upgrade back available recently) and nothing more, and going mid 11s with no issues. The 3.0 should be pretty stout. The car uses to 10R60, so if you go beyond the E50/E85 and get upgraded turbos, you will need a transmission rebuild. One issues that has popped up on 2021 builds is a change to the rear subframe. There used to be 4 bolts holding the diff (2 front, 2 in the back) and now there are 3 (only 1 in the back). There has been some failures of that bolt (which leads to lots of other damage), but it's been guys with E50 tunes (note, and E50 tune is going from roughly 350awhp/400 awtq stock to 520 awhp/540 awtq) launching their cars. Some people have had it replaced with the 4 bolt subframe, but there is a diff support bracket available to help the issue. [/QUOTE]
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