harsh shifts, Aisin

[DFrank]

2019 3500 Aisin. First new Ram since my '03 with 48RE

The down shift to second in T/H is way too abrupt, and too common.

Combine with the EB, and its killing the rear tires on mountain descents.

I know not to use the EB with slick roads, but had some scary winter towing to learn that.

I've searched some threads, but hard to wade through 5 pages of replies.

The initial pedal lag is beyond pathetic. What have folks done to correct that?

The two footed start is needed to pullout into traffic, but I have yet to try it for a highway lane change.

Is this issue transmission programming, or the VVT? I want power when I press the skinny pedal...

Some features of this truck are super cushy; others make me completely regret buying it. Should put new seats and AC in the '03 and driven it for another 1/4 million miles. I do still won the 03 and 05.

 

[TFucili]

Yes, the Aisin is not exactly dialed in, and the '19+ are more so. Prior years seem to work better from owners I have spoken to, including some who have owned both. The new trucks behave differently. I have found that I can't run T/H and EB together when empty, again the programming on the '19+ is very aggressive. I run EB without TH when empty. If you romp on the foot-feed they will sorta lay down. You have to roll into it. There have been reflashes to address the shifting issues, so make sure your truck TCM(?) is up to date. Not much else to do except wait for the next reflash, and hope they eventually figure it out.

 

[GBBrown]

Ive heard its all due to torque manangment programing..my 2020 3500 has hard shifts once in a while between 1st and 3rd. The power lag is BS. 1000# torque is useless if it cant be used. I still like it better than my 2015 though.

 

[Regcabguy]

https://official.bankspower.com/insider_news/rd-banks-pedalmonster/

 

[DavidC]

The Wife's 02 Dakota had that pedal lag, very frustrating to say the least.

 

[Tuesdak]

The Firestone tires are Cheap low bidder OEM junk to begin with and likely to be "gone" in 17K miles or so. The rear inflation unloaded is critical for a low life tire like this. I run 45 PSI in the rear of my SRW after weighing it and checking the Firestone inflation charts.

IMO the LAG is worse with the non-HO Chrysler transmissions. Specially stomping it at ~60 MPH. I test drove both 2018's and 2019's. (I also owned a Duramax LLY overheater with a hair trigger throttle so I was for sure evaluating throttle response.)

Be careful with the two-foot driving. In an effort to keep Darwin at bay for those that can't tell the gas and brake apart let alone krap programming ECM's like Toyota that are an unintended acceleration mess... Anyway if you try and keep the power on and use the brakes you will trip the throttle stuck ECM safety and loose all power. You can't quite make it through a slow left turn powerbraking. Yes, the dash lights up like a Xmas tree when you trip this.

 

[DeansRedRam]

I heard of a friend had this, had to bring to the dealer for a reflash and everything is fine for him ever since

 

[EZeis]

2019 3500 Aisin. First new Ram since my '03 with 48RE

The down shift to second in T/H is way too abrupt, and too common.

Combine with the EB, and its killing the rear tires on mountain descents.

I know not to use the EB with slick roads, but had some scary winter towing to learn that.

I've searched some threads, but hard to wade through 5 pages of replies.

The initial pedal lag is beyond pathetic. What have folks done to correct that?

The two footed start is needed to pullout into traffic, but I have yet to try it for a highway lane change.

Is this issue transmission programming, or the VVT? I want power when I press the skinny pedal...

Some features of this truck are super cushy; others make me completely regret buying it. Should put new seats and AC in the '03 and driven it for another 1/4 million miles. I do still won the 03 and 05.

You didn't say if all your software is up to date. I can only assume they are not. Try that first.
I went from an 93 to an 07 to an 18. I would never got back. My 18 is an outstanding truck.

Earl

 

[DFrank]

Thanks guys. I had it in for lousy AC, and he said it had no other recalls shown, but it seemed like maybe he didn't know what he was talking about.

I'll ask again

 

[Wiredawg]

Friends,

What did you do for a test drive before purchasing? I'm curious if your trannies have given you problems tho whole time, or evolved progressively worse.

My dealer offered me to take my 2017 5500 home over night, bu had the dogs with me. I came back the next day and test drove it for two hours, Interstate, curvey country roads, and slight hills. Was and still is good.

I realize 2019/20s may have different programming, but still, no indication on test drive.

Cheers, Ron

 

[DFrank]

Test drive was not that long. Obviously noticed the deal lag off the line, but didnt realize that tit would actually be a safety issue. The harsh down shifts went unnoticed until more regular driving.

I've never owned an EB before, so that part is new to me.

Sounds like guys use this always but the TH, not when unloaded.


I definitely prefer TH for climbing mountain roads even unloaded, but not digging it on the decent.

 

[Wiredawg]

Test drive was not that long. Obviously noticed the deal lag off the line, but didnt realize that tit would actually be a safety issue. The harsh down shifts went unnoticed until more regular driving.

I've never owned an EB before, so that part is new to me.

Sounds like guys use this always but the TH, not when unloaded.


I definitely prefer TH for climbing mountain roads even unloaded, but not digging it on the decent.

On a Cab and Chassis, EB stays on until you toggle it off. Mine stays on all the time, except snow/ice. With 4.88s, TH and EB leave marks from the seat belts, way aggressive.

Anyhoo, good luck with yours.

Cheers, Ron

 

[AKDoug]

It sucks, even with the update. I am getting used to it, but because I drive really big trucks a lot of these idiosyncrasies of the '19 Aisin aren't that big of a deal to me. I drive my Ram like I do my heavy trucks, ease into traffic and be patient. Not exactly what I want to do with a pickup, but it's what I'm doing now. My '06 Duramax is way more sporty, but chokes on the loads I easily tow with this '19 Ram.

 

[TFucili]

A brief test drive reveals very little. I noticed some general clunkiness, which I can live with, and wrote off to adaptive learning, and I actually like firm shifts, so I was OK with that aspect. Once you drive it for a while, though, and get it into circumstances that the test drive didn't cover, such as slow-rolling up my driveway and getting the 2-1 slam, or pulling the toy hauler in various circumstances, then things like the 2-3 shudder reveal themselves. I fully expected it to be "truck like", and chose it because of that, but some of this behavior is just embarrassingly bad. My wife really, really, really dislikes it when it about shudders her out of the seat. The Aisin was the one component I went into this with the most confidence in, and it is probably my biggest disappointment.

 

[gsbrockman]

I definitely prefer TH for climbing mountain roads even unloaded, but not digging it on the decent.

What aspect do you dislike whilst using TH on descent....and is this dislike truck only or towing? What axle ratio do you have? 3500 could be 3.73 or 4.10, as you never specified SRW or DRW.

 

[Wiredawg]

Have y'all gone back and driven another 19 or 20 truck configured like y'all's to see if you have one offs or if this is how all of them are?

 

[TFucili]

Have y'all gone back and driven another 19 or 20 truck configured like y'all's to see if you have one offs or if this is how all of them are?

Personally, I have not, and the reason is there are lots of folks popping up on other forums with the same basic issues, and the fact that there have been several TSBs issued that specifically call out these issues. That tells me I don't have a one-off truck.

 

[Wiredawg]

I guess there was a blessing in going for the killer deal on the year holdover versus waiting.

Again, good luck getting it fixed.

Cheers, Ron

 

[EZeis]

Thanks guys. I had it in for lousy AC, and he said it had no other recalls shown, but it seemed like maybe he didn't know what he was talking about.

I'll ask again

Flashes aren't usually recalls but TSB's. Only covered under warranty if you complain of the symptoms listed in the TSB.
You can tell the dealer it's shifting odd and ask if there are any software updates.
I just had my 2018 done. I emailed the dealer. Then later found a TSB and informed them. They flashed the software update on my trans under warranty.


Earl

 

[Wiredawg]

So, do y'all have any theories as why this is... did they tighten the shifts up too much to handle all that power and load? You know what used to kill auto trannies on diesels too much slippage and heat.

Just curious cuz I dont think it was just a mistake on their part... or wuz it?

Cheers, Ron