Hello Everyone;
I just took my Chevelle for a ride for the first time after an LS7/4L70e swap.
The transmission is brand new and upgraded to handle the power, I bought the transmission from TrueTech transmissions and he guaranteed me to handle 600hp no problem.
it has a 2800 stall yank converter.
1-2 shift hits really hard and wont let me go over 4k rpm, seems to shift right at 4000 or so.
3-4 seem smooth but again wont let me go past 4k rpm
Once cruising at 40-50 mph it will not downshift at all when I punch it, but when you come to a stop light it does go back to 1st gear.
rear end is a posi 9" with 3.50 gears. my tire height is 28.1" I think that's set-up correctly on the tune.
I got this harness/ecm set-up from PSI conversions and this is the tune it came with.
can someone take a look at the tune and let me know where to start? I am a noob with HP tuners but I am eager to learn..
Please let me know any feedback you may have.
Thank you
Are you referring to WOT up/down shifts? If not, you will have to log some part throttle shifting.
Your tune is commanding WOT 1-2 shift at 36 MPH. Based on your rear gear, tire size and 1st gear ratio, this would come out to around 4600 RPM. 2-3 shift would be around 4700. You probably just need to go through and raise your upshift/downshift values until it gets to where you want it.
The car at WOT yes shifts 1-2 at around 4000 or so and 2-3 also around the same.
But it will not downshift at all at any speed unless I come to a full stop.
Also 1-2 not at WOT is a very hard shift...as I mentioned before I am new to tuning and don't want to mess anything up.
I really want to learn how to tune myself so I read forums every night but cant really find much on 4L70's or 4L60's..
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