Let's talk manual transmissions - Dodge Challenger Forum: Challenger & SRT8 Forums
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post #1 of 81 (permalink) Old 03-03-2019, 10:22 PM Thread Starter
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Let's talk manual transmissions

Picked up a used '15 R/T Plus Shaker against the advice of a Redditor. who also test drove it. Because it was the color, trim, interior, transmission, price that I was looking for, I ended up going for it anyway and resolved that if it needed to fixed, I would replace it. I feel like the clutch is solid so I don't think there any issues there. I am wondering if new transmission would be called for for the problems I list below or if I also need a new shifter (Barton was recommended on Reddit)

I'm having it looked at at a Dodge dealer on Wed. but wanted to get some feedback before I go in from the members here. Once warmed up, it's not too bad, but I do notice a few things especially when it's cold or even after warmed up for 15 mins or so.

It feels like there is an extra notch I need to get past when shifting into first.
I sometimes feel the same issue going into 2nd or reverse
Lately, I've noticed I slip from 1st into 4th instead of 2nd but just noticed that today. Maybe I will just shifting lazy or something.
Going into first or reverse sometimes doesn't go in "all the way" and I grind a little bit or have to push it up a little further.

These issues sound awful but it's my daily driver and I've gotten used to maneuvering the stick the right way to make it work, but what I really want is the best shifting experience this car can have and I'm willing to invest into it to make that happen as I intend to hang onto it.
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post #2 of 81 (permalink) Old 03-03-2019, 10:32 PM
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Welcome to Challengertalk. I'm sure you'll get more replies, but many have reported better shifting withn the Clutch Delay Valve removed

https://www.challengertalk.com/forum...-valve-469058/

Your complaint is not unusual

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post #3 of 81 (permalink) Old 03-03-2019, 10:50 PM Thread Starter
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Hold up, so you're saying I can pop open the shifter myself and remove a little piece that will improve the feel that much? (I'm very new to cars so a lot of the explanation in that article is over my head)
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post #4 of 81 (permalink) Old 03-04-2019, 12:04 AM
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It's actually under the car, and what you report has been at least greatly improved by those who have done the CDV delete, yes. Not guaranteeing that's your issue, but sounds likely.

This guy wrestles with it a bit, but you see what's involved


People have reported a wood screw (with a tapered tip) is the best way yo get the CDV out.


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post #5 of 81 (permalink) Old 03-04-2019, 05:19 AM
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Let's talk manual transmissions

Welcome to CT. Everyone is correct about the removal of the cdv. It improves shifting tremendously. Also the first to 4th is caused by the factory programming at certain speed conditions. You will need to invest in 1 of 2 options. The first is the cheapest and most common. The second is considerably more expensive but gives complete control of the vehicle features. First you can get a skip shift eliminator from many of the supporting vendors. Second you can get HPTuners and program it out along with the ability to tune your car. I have both so I can’t recommend one over the other. I started with the Skip shift eliminator then bought HPT once I started going faster.


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post #6 of 81 (permalink) Old 03-04-2019, 05:30 AM
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When I got mine a year ago it had a little slight noise going in to 5th gear over a month it that started grinding and got louder and it ended being the synchronizer


Darkbuiler, is that something the Diablo tuner can do?


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post #7 of 81 (permalink) Old 03-04-2019, 05:39 AM
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I haven't done the clutch delay valve mod and don't plan to, but thought I'd share some info. The TR6060 Tremec trans that we have is "notchy" in colder weather. This is usually limited to second gear but can be other gears. I drive my Scat Shaker year 'round, so when it's parked outside in frigid temps while at work I sometimes skip second and go to third as it warms up. Easy.

Going from 1st to 4th occasionally may be due to the "skip shift" feature of the trans as noted above. Check on this in your manual or the internet. If this is what you're experiencing it's normal. I installed the skip shift eliminator which plugs into the trans under the car. 10 minute install for $25.

The notchiness in the trans is the same for Camaros. Same exact trans and my 2011 Camaro SS behaved the same. My Challenger has the Barton shifter which is an awesome mod. Tighter, firmer shifts and less notchiness than the Camaro.

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post #8 of 81 (permalink) Old 03-04-2019, 05:46 AM
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The joys of having a gearbox that can take a beating from drag racers and monster V8s. Try shifting it when it's -40 out. Pulling out of one gear is a slow, deliberate movement, then putting it into the next is another slow, deliberate movement. The bearing whine noises it makes at those temperatures sounds like an old A-833 4 speed from the 70s. Of course once it's warmed up, it's back to normal. All part of the experience!


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post #9 of 81 (permalink) Old 03-04-2019, 06:17 AM
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+1 for the CDV delete. I've had a couple different people who've driven my car ask if I have and aftermarket clutch in it because it feels so much better.

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post #10 of 81 (permalink) Old 03-04-2019, 07:06 AM
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IMO top mods for the M6 are:

Low hanging fruit
CVD delete (FCA add this to reduce drivetrain shock by causing the clutch to slip during engagement...yuck!)
Skip shift eliminator (or can be disabled with a tune - PCM unlock required along with tuner. Can be easily done with HP tuners, Diablo requires CMR software or professional tuner)
Differential brace (greatly reduces diff rocking slop)
Quality synthetic manual trans oil (I use RP Synchromax)

Requires some significant coin
Barton shifter (shifts feel way more precise)
Whiteline cradle bushings (will eliminate wheel hop)
One piece driveshaft (not everyone's cup of tea but your clutch will feel like it is directly connected with the rear wheels)
Mcleod clutch (something to think about if your stock clutch goes kaput)
SF block ring (I have read it helps take away some of the notchiness between shifts)


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2015 Challenger RT+ (non-STP)
8lb Magnuson w/ Innovate PSB-1 wideband/boost/shift light gauge
Corsa extreme (2.5")
4" Aluminum one-piece driveshaft
Hellcat bottom airbox
Stainless Works LT headers (2" primaries)
Barton shifter assembly w/ Lou's short shaft and Speed Dawg knob
Comp Cam 7929 & 7748 push rods (gives slightly more lifter preload)
A2speed aluminum coil and valve covers (built in catchcan)

Last edited by ChallyTatum; 03-04-2019 at 07:13 AM.
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