Tuning Question

[04Intimidator]

Ive got 04 MC an these cars dont have a button for performance shift its just trac on or off, ive got a guy who uses a DHP tuner that is gonna tune my car. now will tune be automatically or just it activate when I take the traction control off?

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[TonzKnock-G]

The tune is permanent after he saves the tune to your cars computer (PCM).

 

[04Intimidator]

alright thanks

 

[Ron Vogel]

You can wire in performance shift on those cars...it's just a ground wire and switch to pin 21 on the pcm harness...

 

[Freebeer187]

You can wire in performance shift on those cars...it's just a ground wire and switch to pin 21 on the pcm harness...

This is what I did with a canned dhp tune. Made a very noticable diffrence... Then a few months later my trans blew with about 70K miles on it.... >:|

 

[1quick]

if you dont have a perf shift button the pcm is set like the perf shift is on at all times

 

[04Intimidator]

how did your trans blow up??

 

[Freebeer187]

how did your trans blow up??

The forward apply band (pretty sure thats what its called) broke. Not sure if its because of the tune or what but I like to blame the incident on it

 

[Fish]

The forward apply band (pretty sure thats what its called) broke. Not sure if its because of the tune or what but I like to blame the incident on it

FWIW, the 4T65E-HD can last running 12s, or fail stock.

 

[SleeperLS]

yeah, these trannys are a pain in the ass. I would just make sure that who is doing the tune doesn't jack up the line pressures too high. Could lead to premature failure.

 

[CrunkMaro]

+1 on wiring in a switch.
Also, if you don't want to change stock shift patterns (and are on a stock car) you can just have your buddy change WOT shifting patterns in the WOT upshift/downshift tables.

+2 on touching trans pressures. Shorter shift times, !torque management (idk if FWD cars have this option, i knew my RWD 3800 series did), adjusted shift points, adjusted downshift vs TPS shift points should be more than enough to get some extra performance without sacrificing your trans.

 

[Ron Vogel]

+1 on wiring in a switch.
Also, if you don't want to change stock shift patterns (and are on a stock car) you can just have your buddy change WOT shifting patterns in the WOT upshift/downshift tables.

+2 on touching trans pressures. Shorter shift times, !torque management (idk if FWD cars have this option, i knew my RWD 3800 series did), adjusted shift points, adjusted downshift vs TPS shift points should be more than enough to get some extra performance without sacrificing your trans.

Ever look at a DHP canned tune? The line pressure is pretty much at max from idle to redline!

I'm personally not a fan of doing that (because it can lead to seal failure over a long-term basis)...however it wouldn't (or shouldn't) cause hard part failures. I bump them up a little, but increase exponentially with rpm's.

 

[10sec]

Ron should know best, he's probably the only Wbody owner who successfully ran 12's, let alone DEEP 12's on a stock trans that (knock on wood) still hasn't failed. You got the 1 out of 1,000,000 trans we all wish we had