My Challenger 1320 Scat Pack Does Wheelies | 3.90 Gears Installed | TCM Issues 

Bro! That's awesome! This thing is going to hurt more feelings with simple bolt-ons.

Looking good !!! Once you get the tune for the gear change it's going 11.50s easy with a 4400 pound car !! The wheelie was cool for sure !!

I had been thinking of changing the ratio in my 1320. Great video.

HOUSTON, we have LIFT OFF!!!

Looking good. That last vid didn't look like you had any spinning. I am anxious for you to get it tuned! That sublime looks pretty damn good going down the track.

I did the 3.09 to 3.90 swap in my 16 A8 Scat in 2016 and had issues too. car would hit fuel limiter on 1-2 and 2-3 shifts. figured out all I needed to do was pull TCM fuse to clear learned adaptives and car was good. gained .1 in the 60' and another .1 in the 1/8th. back half did not change.

In my 1320 stock just seat delete I ram 11.22 in the 1/4 mile. Up here in Kentucky also I had a tire

Awesome runs

Nice runs! What wheel/tire combo do you run in the front and rear? Keep up the good progress!

Cool car. I am starting to really dig those 1320 Scat Packs.

Awesome video!!! Been looking for ways to mod mine. So many tips out there. Destroyer, demon jr. Paying att to all of them. Looking forward to the next. New sub btw. 👍🏼

Got you here to brother cool vid sweet Ride 🇺🇸🔴👍🔧🚘🔥💯

Am I wrong that a 3.90 swap just needs the TCM reset? Plenty of others have done this without tuning.

Can’t even swap gears without it wrecking havoc on the whole drivetrain. That’s why I just don’t like these new computer controlled Challengers. I want to like them and almost bought one a month ago. I’m just frustrated with them and I keep wanting to get a vintage one instead. I really miss my GB5 blue 1971 that I stupidly sold 21 years ago. I could put 4.10 gears in the 71 with zero problems and it didn’t weigh anywhere near 4400 lbs!! Even a big 71 Charger weighs less at 4050 lbs..

I am very interested in putting the 3.90 axle in my 1320, but not if it causes all these problems. Sure wish I could find out if they ever got this worked out...

You need to smoke stangmode. Lol he seems like a nice guy.

That charger was catching up towards the end

Very interesting. I did this in 2020 to my 19 Gt (v6) and it was great except for not shifting quick enough in 1st and 2nd. It would rev limit, bog, shift, then do it again. Aside from that I had no other issues. I wonder if this is specific to the trans tuning for the 1320?

I’ve been curious the difference this would make at least with 3.70s.

Hey man, you keeping the 3.90 gears? I'm really hoping it works as I want to try it in mine

That’s charger has too be setup nice too hang with you

Just had a curiosity. Did you manually shift the car or did you let the transmission shift automatically??

Nice runs BTW.

What was done to that blue scat? He was reeling you in slowly? Wonder if the 3:90 is killing top end

How come you have not done anymore videos? It's been a year. I was really hoping to follow you all the way through your future mods. :-(

Also you better get a diff brace

Oh shit that’s Adco I like 30 minutes from there

Did you ever get the issues fixed ?

Mustang killer

Nice man will the 3.90 gears work better then stock gearing on the 392s?

Where did you order your 3.90 gears? I too have a 2015 scat pack challenger looking for these gears

What was the DA? I went 11.30 with nothing more than a swap to skinnies up front at Atco on Nov 1 DA was about -400. Here in FL I went 11.48 with stock Nextel’s on all 4 corners.

Once you get a tune I think the car will wake up 11.5 no problem.

What gearing would be better for top end speed rather than torque and what options are there

Was curious if you've had any luck getting it sorted and what it took to get it there.

I thought a gear swap on these things was just swapping parts and no tuning was needed?

Is that a stock 392!?!

what brand and size slicks are you running on the race stars?

What size wheels and tires do you run. Front and back. Awesome 1320. Thinking about buying one.

Is that an otherwise stock Scat Pack? Just 3:90s only?

let me know how the tune works with the codes and what codes are they. I just put 3.90s in my scat and am tuned but not sure if its my pedal commander messing up, my cars throwing throttle codes what codes are you getting. The codes haven't come back since I messed with the pedal commander connection it was losing power turning on and off. but I haven't ran it hard after that yet.

What all mods do you have done to it now ? And what’s in store for the future ?

Need the 15" rear, E85, Lontubes, and tune......

ever listened to green machine by kyuss?

If you don't mind me asking, how did you go about adding the 3.90 gear? Buy a whole unit? or ring and pinion and install it on factory 3rd member? I will be looking to do the same with my challenger is why I'm asking. Thanks in advance for your response.

Doesn't the 1320 do that with just the stock diff?

u mentioned yur car weighs 4400, u must have alot of options in yur car cause my 1320 weighed 3950 at the track with front skinnys and no rear seat or pass seat, 1/4 tank of fuel, my best 1/4 mile ET was 11.55 stock @ 118 with a 1.65 60 ft, i'm sure yull do better once yur car has a tune for those 390 gears u put in

Did you remove your front sway bar?

Did you tune it? ECU and TCM?

Did you have to tune the car or transmission after changing gears?

I guess you sold the car????

What od tire size in front 26 or 28 OD?

Let me know when you get it fixed and what you had to do to fix it. And when you get it lined out your tag needs to read bye bye

Has the car been tuned

Any updates??

How much horsepower do you have

Stock???.. or the 3.90 being the only mod?

Bcm needs update.

Tire setup?

So the demon weights 4200 lbs but your car weighs 4400? 🤔

4,400 lbs online says 3,900 lbs

3.90 gears make no difference. Stick with 309's

3.90 Too heavy

My stock scat ran faster than that bone stock on street tires and full interior

The 1320 comes stock with 3:90 gears.

Any updates?