I have had mine in for a few days now. So far no down side, no abnormal behavior. pre revving downshifts is much better and more consistent. Maybe a small improvement in midrange. really noticeable in the upper RPM. I am happy with this mod.
can't wait to hear your initial thoughts, see the numbers and find out what you think of the sound. I just ordered the larger throttle body and am thinking these could be a nice next mod.
please see these threads:
https://www.mustang6g.com/forums/threads/gear-change-from-3-73-rear-gear-to-4-11-in-my-gt350.96590/
https://www.mustang6g.com/forums/threads/gear-change-from-4-11-rear-gear-to-4-56-in-my-gt350.104766/
If you do a search on this GT350 forum a chart is posted. It's not all that much of a drop. It could affect shift points on a track (+,-) but for the street it is much better
Thank you for posting this. On mine, if I am in 3rd on and off the throttle very lightly and then bring it to the floor it will occasionally barley accelerate. If I lift and bring my foot back done it clears up. Wonder if I am starting to have this issue.
I finally got the 4.11 rear end in mine. The car should have been this way from the factory. It is a LOT of fun with out being to revy. It is a fine DD. Although I only drive mine in the summer and take something else if it is going to be too nasty out. FYI, I put Signature wheels on dropping...
My box held up better, but was still pretty beat up when it arrived. At least my driveshaft and hardware were all undamaged. Thankfully it sounds like you will be getting a new one soon