WOT shifting ???
#1
TECH Fanatic
Thread Starter
iTrader: (14)
Join Date: Sep 2003
Location: Tennessee
Posts: 1,312
Likes: 0
Received 0 Likes
on
0 Posts
WOT shifting ???
I tuned a buddy's truck and removed all of the tq mgt that I know of. I increased the pressure, increaded shift points, increased the shift speed, and it still has lazy shifts at WOT. It acts as if there is still tq mgt but I don't see how. It is an 04 Silverado. I took the eng tq mgt out too. Any ideas? Anyone have their tables that I could compare to? Everything else is fine....it just isn't shifting hard as he would like. It actually doesn't shift har at all. It is about like stock. Thanks in advance.
#3
formerly 1BADC10 (12/14/2011)
iTrader: (2)
Join Date: Aug 2005
Location: TX
Posts: 2,135
Likes: 0
Received 0 Likes
on
0 Posts
Just don't start increasing line pressures. Not a safe way to firm shifts. Keep the shift time above .200. Sounds like it's time for mechanical upgrades. If you removed all TM, advise your buddy to start saving ducketts.
Good luck!
Good luck!
#4
TECH Fanatic
Thread Starter
iTrader: (14)
Join Date: Sep 2003
Location: Tennessee
Posts: 1,312
Likes: 0
Received 0 Likes
on
0 Posts
It shifts no where near as hard as my truck does. It's like it didn't do anything to the shifts. Shift time is above .200. i didn't mess with the pressure much at all. I have done my research and I have tuned a few trucks the exact same way and everyone of them responded very well. It just seems like something is still on here. I have been experimenting with my truck for the last few years so I am not a complete newb when it comes to tuning. I just found it weird that his truck had no response to the same tuning I have put in everyone else's truck. I have had tq mgt removed on my truck for years with no problem. Along with 5 other trucks I have done. I think that is more of an opinion and difference in driving thing. I don't want to get into that here.
#6
TECH Fanatic
Thread Starter
iTrader: (14)
Join Date: Sep 2003
Location: Tennessee
Posts: 1,312
Likes: 0
Received 0 Likes
on
0 Posts
I have tried it both ways. I originally left 25% tq mgt in because that is what I normally do. The weird thing is it shifts like I want it to from 2nd-3rd. But 1st-2nd is very lazy. It feels just like it did when it had full tq mgt and stock settings. I messed with the shift rpm and shift speed thinking something was off there and nothing. I put a tune in there that I know makes a truck shift freakishly hard and still nothing. i don't know if there is another table somewhere that I don't know about....because the trucks I have tuned are 2000 and 2001 models. Have they added something somewhere that I am just not changing? I don't know. I am still searching though.
Trending Topics
#8
TECH Regular
iTrader: (2)
Join Date: May 2006
Location: CA
Posts: 439
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by TN94Z
I have tried it both ways. I originally left 25% tq mgt in because that is what I normally do. The weird thing is it shifts like I want it to from 2nd-3rd. But 1st-2nd is very lazy. It feels just like it did when it had full tq mgt and stock settings. I messed with the shift rpm and shift speed thinking something was off there and nothing. I put a tune in there that I know makes a truck shift freakishly hard and still nothing. i don't know if there is another table somewhere that I don't know about....because the trucks I have tuned are 2000 and 2001 models. Have they added something somewhere that I am just not changing? I don't know. I am still searching though.
#9
Moderately Differentiated
iTrader: (4)
Originally Posted by RandomHero
seems a bit obvious but you changed the shift times to 0.00 right?
#10
17,16,15,14,13,12,11 Drvr
iTrader: (10)
Join Date: Aug 2003
Location: Mont Belvieu, Texas
Posts: 6,713
Likes: 0
Received 0 Likes
on
0 Posts
your 1-2 shft times are like .587 move them down to .200 and leave the shift firmness stock or bump it up +10 from 246tq to 640tq not to exceep 90 psi in any column.
good luck.
good luck.