BB tune on 4.8

[KnuckleHead]

I have recently purchased a used Tahoe that I am looking to get a BlackBear tune on and was just wondering if anyone has had this done on a 4.8 Tahoe and what kind of gains did you get from BB tune? MPG? Performance? I have already added a Volany CAI to it. Just want to see if BB Tune is worth getting done since I have 4.8.

[blueflamed03]

I did on my Yukon 4.8. Added an AEM Brute Force and had Justin do a live tune, 100% TM removal...93 octane tune...runs amazing!!!

[Campi3ell]

:jawdrop::flamingdevil: I haven't installed a CAI on my Yukon (yet), it may be a Christmas present to myself. I had a live tune by Justin for my 4.8 and I like the results. I didn't have TM completely removed, I wanted shifts to be firmer, but still smooth.

Justin reprogrammed the Tow/Haul button as the "Sports mode," and it works ...too well. Failed to talk my way out of a ticket few weeks back. Luckily the laser only clocked me at 73 in 55 :driver:

I opted for the 89 tune, and I'm happy. I may be more aggressive with the tune when I trade up to a Denali/ Escalade in a few years

[SWSS]

Hey guys, just curious. what is a TM and why would you want it removed?

[felixgun]

It's referring to the transmission control module. Firmer shifting.

[JennaBear]

TM is torque management.

[blueflamed03]

TM is torque management.

yup, like having a 4 barrel, and wiring to where only the front 2 barrels work...there's more untapped power there, no hand held will ever get you like Justin can.

[KnuckleHead]

Ok, so if Justin with BBP, can adjust TM for firmer shifting, then why need a vette servo? I thought the vette servo did the same thing, right??? I guess I just want to see if purchasing a vette servo is really worth it. I know that its a cheap upgrade, but just want to see if its worth installing on my hoe.

[Sasquatch]

I was interested in the vette servo before i got my BB tune but after i had the tune i knew i wouldn`t need one. I told justin i would like the hardest shift possible with the tune and i could not be happier.

When i had my truck re tuned justin asked me if i had a servo in the transmission when we drove around but i didn`t so maybe i`m lucky and it shifts harder than other trucks? I don`t know.

[JennaBear]

The TM and the servo are two different things. TM is in the computer tuning, the servo is a part.

The servo provides a beefier than stock 1-2 mechanical gear shift servo. This part is a common failure in the 4l transmissions, so upgrading a $20 part, can save a lot of $$$.