C4 Transmission issue

HawkBrosMav · 09-23-2019, 11:19 PM

We’ve got a pretty good rpm flash during the 2-3 shift. I’ll have to look at the logs, but shift around 5900 on the tach and you can see the tach flash up to about 6400. The 1-2 if there is a flash is much less noticeable on the tach itself.

This has been something we’ve noticed much more since we took the stock 1st gear out and put in a 2.92 ratio. I personally don’t know why that would give us a flash unless when reassembling we got something adjusted incorrectly. Just swapped to a brand new ATI converter and a different cam recently and the car is as fast as it has ever been but the flash seems to be worse.. any suggestions on making it go away and/or if we are losing ET because of it?

09-23-2019, 11:19 PM	#1
HawkBrosMav Member Join Date: Apr 2009 Posts: 362 Likes: 6 Liked 302 Times in 73 Posts	C4 Transmission issue We’ve got a pretty good rpm flash during the 2-3 shift. I’ll have to look at the logs, but shift around 5900 on the tach and you can see the tach flash up to about 6400. The 1-2 if there is a flash is much less noticeable on the tach itself. This has been something we’ve noticed much more since we took the stock 1st gear out and put in a 2.92 ratio. I personally don’t know why that would give us a flash unless when reassembling we got something adjusted incorrectly. Just swapped to a brand new ATI converter and a different cam recently and the car is as fast as it has ever been but the flash seems to be worse.. any suggestions on making it go away and/or if we are losing ET because of it?