[VancityCat]

Hey guys,

Wondering if anyone one else has had this issue and what the proposed solution would be:


My car (since I bought it ), 2021 Redeye Charger Hellcat , when downshifting in Sport or Track, only "match revs" or "throttle blips" inconsistently.

Sometimes it downshifts in Track and match revs (which I love) and other times it downshifts like its in street (super slow and causing a LOT of deceleration).

Anyone have a suggestion? Is there a TSB for this? Battery unplug may solve it? Reflash? TCM update?

Would love to get feedback as it makes the car a lot LESS enjoyable in the city when you're hot-rodding around in track mode and your downshifts are sloppy and not rev matching.

THanks for suggestions.

 

[Spartacus]

Put the shifter in manual mode.

 

[VancityCat]

Put the shifter in manual mode.

Doesn't make a difference. But thanks for the tip! Definitely gave it a shot.

 

[707F6F]

I'm experiencing the same thing. Sometimes it doesn't revmatch and the downshift is rough without it.

 

[Quasar Z]

Did you change out the rear differential? When I went from the 2.62 to the 3.09 my car did the same thing. Changed back and the rev matching worked perfect every time

 

[707F6F]

Did you change out the rear differential? When I went from the 2.62 to the 3.09 my car did the same thing. Changed back and the rev matching worked perfect every time

Yes, 3.09.

 

[Quasar Z]

I had the same issues. I went back to the Dodge dealer to have them reset the adaptives and apply any software updates as well as had a local tuner reset the trans adaptives. Nothing worked and I really didn’t find the 3.09 to be that big of a difference, plus it made more noise than the 2.62. I swapped back and the car went back to normal right away.

 

[S8ER01Z]

When I went from 3.42s to 3.90s in my Z28 the car wouldn’t even function properly without correcting that information in the tune. That was 20 years ago so I have to assume even a small gear change on a modern car requires a tune adjustment.

 

[VancityCat]

Yes

Did you change out the rear differential? When I went from the 2.62 to the 3.09 my car did the same thing. Changed back and the rev matching worked perfect every time

yes I did go to a 3.09 Gear .

okay I guess it’s time for a tune .

 

[NoScat]

Hate to say it as I have an A8…if we had a M6 all these threads would never existed. Oh wait, let me make sure I press this button before we race!!! Too much electronics on the A8s.

 

[VancityCat]

Hate to say it as I have an A8…if we had a M6 all these threads would never existed. Oh wait, let me make sure I press this button before we race!!! Too much electronics on the A8s.

Yes I had the tremec 6060 in my CTSV- it was great - but in track mode the ZF Hellcat is an animal.

just called my buddy at Forza tuned , he said trans shift scheduling parameters need to be tuned to get a 3.09 to work in a 2.62 perfectly .
I’m going to just use this to do stage 2 with him which is

10% lower
pinned crank
Plugs
Thermostat
Tune

Should be good for 100Hp. Or bring the Redeye to 800whp safely on 93.

 

[Dodge Boy]

Hey guys,

Wondering if anyone one else has had this issue and what the proposed solution would be:


My car (since I bought it ), 2021 Redeye Charger Hellcat , when downshifting in Sport or Track, only "match revs" or "throttle blips" inconsistently.

Sometimes it downshifts in Track and match revs (which I love) and other times it downshifts like its in street (super slow and causing a LOT of deceleration).

Anyone have a suggestion? Is there a TSB for this? Battery unplug may solve it? Reflash? TCM update?

Would love to get feedback as it makes the car a lot LESS enjoyable in the city when you're hot-rodding around in track mode and your downshifts are sloppy and not rev matching.

THanks for suggestions.

Hello,
I am sorry to hear it.
The behavior you are experiencing is known an can the solved.

Definitely I can support your with professional transmission tunning. I have more than 10y of experience tuning ZF products.
Please, send me an email: [email protected]

Thanks.
Dodge Boy

( YouTube: https://www.youtube.com/channel/UCAl4bUhkijzHdK8B9m1Z2lQ )