Gm tcm issue

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 12:58 pm

Hey mike I got a little hiccup on my truck loaded both tcm tunes
Adjusted firmer all gears -4 all shifted ok except third to fourth
Tries to rev up a little. Steepen the gear change only happens third
To fourth any ideas maybe up rpms ? I'm stumped doesn't do IOC I just load either tune and make no adjustment
Thanks
Stan

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 1:55 pm

Post by **mikel** » Mon Jun 25, 2012 3:55 pm

Im not following, are you saying it shifts weird from 3-4 now?

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 4:05 pm

Yep if I firm up the three to four shift on either tune it actslikethe engine speeds up then shifts into gear if I makeno firmness adjustments it shifts fine on both tunes

Post by **mikel** » Mon Jun 25, 2012 4:06 pm

make the change then post the tcm backup and last tune written.

Thanks

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 4:09 pm

Ok I'll send it later tonight not at my laptop right now thanks

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 4:09 pm

I'll email it to ya

Oldsaltydog · Post by **Oldsaltydog** » Mon Jun 25, 2012 4:29 pm

files on their way

Oldsaltydog · Post by **Oldsaltydog** » Tue Jun 26, 2012 7:19 am

Loaded tune at -4 firmness across the board upped shift rpm plus 100 rpms thru first four gears drove about fifty miles last evening no issues so far I'll test today pulling my landscape trailer. To see if I can get it to do it again I t did fine last night at mentioned settings on firm shift tune

Satch606 · Post by **Satch606** » Tue Jun 26, 2012 1:00 pm

My TCM is odd. I'll modify the 1-2 shift down from banging and its fine when it's written. Give it about 50 miles or so and it learns its way right back up to a bang shift. I know ECM's have a certain learning curve but this is ridiculous.

Oldsaltydog · Post by **Oldsaltydog** » Tue Jun 26, 2012 2:50 pm

So far so good mikel I emailed u the tcm files have had no issues
Today so far anything odd on the tune files?

Post by **mikel** » Tue Jun 26, 2012 3:25 pm

Johans a little backed up, havent heard back from him yet.

Oldsaltydog · Post by **Oldsaltydog** » Tue Jun 26, 2012 3:55 pm

Ok just let me know thanks

Oldsaltydog · Post by **Oldsaltydog** » Wed Jun 27, 2012 5:06 pm

hey mikel i have not been able to recreate the shifting issue again running great right now think im gonna leave it alone for a while shifting fine even with a 5400 lb. lawn and landscape trailer on its tail it may be possible that i didnt reset all the parameters when i was making a bunch of adjustments that day, when johan looks at the files just let me know if he finds anything. thanks a lot

Post by **mikel** » Wed Jun 27, 2012 5:49 pm

weird, keep an eye on it and let me know

Gm tcm issue

Gm tcm issue

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