New tune on 8.1 suburban

Moncowkeymoo · Post by **Moncowkeymoo** » Wed Nov 07, 2018 6:48 pm

I just got the tuner for my 2003 suburban 8.1l and installed the 91 tune.
Now my question is the Transmission shifts hard into 2nd and 3rd and in reverse the idle surges.
I was going to install the 87 tune and see how it does.
Is the hard shifting normal or should I return it to stock and try to install the tune again

Post by **mikel** » Thu Nov 08, 2018 8:34 am

grab copies of the files from the tunes folder on the i drive and post them here and we'll fix it.

Moncowkeymoo · Post by **Moncowkeymoo** » Thu Nov 08, 2018 4:09 pm

Post by **06MonteSS** » Thu Nov 08, 2018 4:13 pm

also need to post the original backup stock tune file...

Moncowkeymoo · Post by **Moncowkeymoo** » Thu Nov 08, 2018 4:28 pm

Moncowkeymoo · Post by **Moncowkeymoo** » Sat Nov 10, 2018 2:06 pm

How do I turn the Transmission to factory but leave the tune alone? Truck runs great but shifts very hard.

Post by **06MonteSS** » Sat Nov 10, 2018 8:23 pm

you can't... takes a custom tune to do it, like I replied to your email about...

Post by **mikel** » Mon Nov 12, 2018 9:37 am

please give this one a shot.

New tune on 8.1 suburban

New tune on 8.1 suburban

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Re: New tune on 8.1 suburban

Re: New tune on 8.1 suburban

Re: New tune on 8.1 suburban

Re: New tune on 8.1 suburban