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05-26-2018, 07:14 PM
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#1 |
 Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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Not Downshifting As Expected
Hey guys,
i have been having this issue since coming out of the winter, my car does not downshift if I go WOT between 15 and 45 mph. I took it to the tuners today and he was not able to fix it. He showed me the different downshifting tables and how he was adjusting and nothing was happening. Has anyone else had this issue? Also, not sure if it's related or not, but my car jerks REALLY bad when putting into reverse from park or drive. Any advice would be greatly appreciated. 2016 SS, A8, TB | IM | CAI | E85 | LTH |
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05-26-2018, 08:16 PM
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#2 |
 Drives: Hyper blue 1ss convertible 6 sp Join Date: May 2017
Location: Munger mi
Posts: 205
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Jerking from park to reverse might be torque converter issue? If so, that would affect downshifting or any shifting for that matter! Maybe its time to detune and take to dealer for warranty?
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05-30-2018, 09:42 PM
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#3 |
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Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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Still having the issue. Tuned it back to stock today with only the flex fuel table changed since I still had E85 had in it. Thinking this is more mechanical now that the stock tune had the same issue.
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05-30-2018, 10:24 PM
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#4 |
  
Drives: 2017 Camaro SS 1LE (F1A-94 FBO H/C) Join Date: Jun 2017
Location: San Antonio Texas
Posts: 844
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so i had an issue when shifting at WOT in any gear, i mean i am M6 so difference there but my tuner upd the rev limiter up 200rpm so changing a lot of things back to stock ended up fixing everything, but yeah i see now your having the same issues stock so probably something more mechanical.
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Performance Mods: F1A-94, DSX Flex Fuel Kit, MSD Spark Plug Wires, KOOK 2" off road headers, MBRP Race catback exhaust, Pray Performance Custom Boost Cam, Rocker Arm Trunion Upgrade Kit, 7.850" Hardened Chromemoly Length Pushrods and Johnson Racing 2110R Lifters, TSP CNC'd Heads, Ported MSD intake manifold, 103mm Katech Throttle body, Forged Pistons/Rods, RPM Meth kit, DSX Aux Fuel system, AEM Failsafe and banks gauge, LT4 HPFP, LT4 injectors, BMR motor mounts, Hurst Short Throw, Manley SS exhaust valves
Videos of my car? Check here: https://www.youtube.com/channel/UCNi...Qy1OL4NVGlPogw |
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05-30-2018, 11:11 PM
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#5 |
         
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,665
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You might try to Fast learn Reset the TCM using the VCM controls in HP tuners.
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 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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05-31-2018, 12:16 AM
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#6 |
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Drives: 2018 Camaro ZL1 Join Date: Aug 2015
Location: Colorado
Posts: 46
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Not sure I have heard the tuner mention the fast learn reset for the TCM. Can't hurt to ask if he has tried yet.
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