21 Aisin lockup question

[saltman]

Quick question for the folks that have a 21, how does your lockup strategy behave on the 1-2 and 2-3 shift, does it shift and slip/stay uncoupled then lockup feeling like an additional shift or does it lock on the shift eliminating the typical converter slip feel? My truck is staying unlocked and I swear the 2020 I test drove felt locked and way more positive on 1-2 and 2-3 shift.

 

[Brutal_HO]

Not a 21, but on my 20, as the (still low @<5000) miles roll on, I'm noticing the lockup "shift" more than I did before. Not like the 2nd or 3rd gear split of my old 48RE, but noticeable.

I honestly haven't thought to check, but is it possible to read lockup from the Aisin using Torque, AlfaOBD, or similar?

 

[Deleted member 80]

On my '19, I don't know how describe it other than it does sort a of "double tap" that feels like lock-unlock-lock, and I find it very annoying.

 

[saltman]

I’d for sure say mine feels just as bad or noticeable as one of my old 48re trucks on the 1-2 shift, I’m pretty bummed because the 20 I test drove was flawless and a big part of the reason I pulled the trigger on ordering a 21. It felt so good I almost didn’t believe it was an aisin. I’m going to stop by the dealer this week and drive another 21 they have sitting on the lot that is a similar configuration to my truck. One of the main reasons I went for the aisin over the 68 was because of the firm locked up feeling it had, it was quick to upshift (some people hate, I love it) and used the low end grunt of the Cummins like a manual trans can. Staying uncoupled in 2nd feels like garbage and when putting any fuel to it just makes the lockup even more noticeable at the top of 2nd

 

[The1adman]

My 21 Aisin shifts like you described with the additional lockup in 2nd. The 2-3 shift is still hard when the toy hauler is attached.

 

[saltman]

Thanks for the input!

 

[saltman]

Bringing this one back up in case any other new aisin owners missed it

 

[carlrx7]

My '20 definitely shifts different with the Mar flash update they did last week. But it could all be plecebo or AISIN relearn. "Feels peppier?" almost like a throttle booster. My avg MPG is down to 15.1 from 16.0, Probably all in my head/right foot.