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Kevin01Z28 · 01-25-2021, 12:14 AM

Hello everyone. I recently sold my H/C/I 2001 Z28 w/TH400 😐

I bought a 2018 Camaro SS A8 with 18,000 miles. I absolutely love the car. One of the first things I’m doing is deleting the AFM, cause I can’t stand it. I removed the F51 fuse, just to hear the exhaust tone a little better at lower rpm’s, and noticed that during cruising speeds (before the ECM activates V4 mode) the converter will unlock/lock every 8 to 10 seconds. As far as I can tell when in eco or V4 mode the converter remains locked. Swapped to over to manual mode while cruising in 8th, still does it.

Also when dropping 4 cylinders, particularly at lower engine speeds in 8th there’s a pretty noticeable vibration. If I give it just enough gas to disable AFM (not enough to unlock the TC) it immediately smooths out. So long story short I want the AFM disabled, but don’t want my TC unlocking constantly.

Other than take it to a dealer to have the trans fluid flushed and replaced with the newer fluid that apparently can fix this issue sometimes, are there any other options? Possibly something in the tune that can be tweaked so the converter stays locked longer? Only tuning I’ve done was on LS1’s for bolt one’s, larger stalls, idle/part throttle tuning for mild cams. I’m no expert, so I’ll leave it those who are. I believe I got 9 months left on my 3 year 36,000 mile warranty. So I guess if the dealer is my only option, then I’ll try it out.

01-25-2021, 12:14 AM	#1
Kevin01Z28 Drives: 2018 Camaro 2SS Join Date: Jan 2021 Location: Louisiana Posts: 10	A8 converter unlocks while cruising Hello everyone. I recently sold my H/C/I 2001 Z28 w/TH400 😐 I bought a 2018 Camaro SS A8 with 18,000 miles. I absolutely love the car. One of the first things I’m doing is deleting the AFM, cause I can’t stand it. I removed the F51 fuse, just to hear the exhaust tone a little better at lower rpm’s, and noticed that during cruising speeds (before the ECM activates V4 mode) the converter will unlock/lock every 8 to 10 seconds. As far as I can tell when in eco or V4 mode the converter remains locked. Swapped to over to manual mode while cruising in 8th, still does it. Also when dropping 4 cylinders, particularly at lower engine speeds in 8th there’s a pretty noticeable vibration. If I give it just enough gas to disable AFM (not enough to unlock the TC) it immediately smooths out. So long story short I want the AFM disabled, but don’t want my TC unlocking constantly. Other than take it to a dealer to have the trans fluid flushed and replaced with the newer fluid that apparently can fix this issue sometimes, are there any other options? Possibly something in the tune that can be tweaked so the converter stays locked longer? Only tuning I’ve done was on LS1’s for bolt one’s, larger stalls, idle/part throttle tuning for mild cams. I’m no expert, so I’ll leave it those who are. I believe I got 9 months left on my 3 year 36,000 mile warranty. So I guess if the dealer is my only option, then I’ll try it out.