Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

Any ideas on a mod to keep A4 from downshifting?

Thread Tools
 
Search this Thread
 
Old 10-14-2002, 06:50 PM
  #1  
Teching In
Thread Starter
 
emarkay's Avatar
 
Join Date: Dec 2001
Location: Southern IN, USA
Posts: 387
Likes: 0
Received 0 Likes on 0 Posts
Default Any ideas on a mod to keep A4 from downshifting?

Keep the A4 in whatever gear it was in so it wouldn't downshift? Say you are doing 40, and you just want to get to 60 - not at a snail's pace, but not like a rocket; say 60% throttle. The computer unlocks the TC, at about 10% throttle, but at about 30% it downshifts one gear and at 50% it goes down two gears, a few jerks, a second of shifting, and then you go.

That LS1 can lug at WOT, and so why can't I get this with an AT - say stay in third an whatever throttle position? Also sometimes I DON'T want a neck snapping jerk, even though I am asking for 80% throttle. Surely the tranny and TC can take the low end torque??????

Would seem to be an easy mod - being the tranny is electrically controlled. It seems that there in no logic to "when" it will kick down - maybe even a kickdown delay circuit - need to find what the downshift inputs are specificaly to the ECM - Hey Delco folks, any ideas ?
Old 10-14-2002, 07:03 PM
  #2  
TECH Senior Member
 
Colonel's Avatar
 
Join Date: Nov 2001
Location: Troy, AL
Posts: 9,246
Likes: 0
Received 2 Likes on 2 Posts

Default Re: Any ideas on a mod to keep A4 from downshifting?

You need a Tranny Tricker. Call Mike at Yank Converters.
Old 10-14-2002, 07:06 PM
  #3  
gwj
TECH Addict
 
gwj's Avatar
 
Join Date: Nov 2001
Location: Live Oak, FL - in the woods where the creatures lurk.
Posts: 2,003
Likes: 0
Received 0 Likes on 0 Posts

Default Re: Any ideas on a mod to keep A4 from downshifting?

Sounds like a simple thing made complicated:
Know how far to push the throttle down to achieve desired results....as you said, no lack of torque here.
(no offense!)
Old 10-14-2002, 07:39 PM
  #4  
TECH Senior Member
iTrader: (7)
 
Ragtop 99's Avatar
 
Join Date: Nov 2001
Location: Bethesda, MD
Posts: 9,491
Likes: 0
Received 1 Like on 1 Post

Default Re: Any ideas on a mod to keep A4 from downshifting?

The question is do you know what you want on a consistent basis? The TCC and shift tables key off of MPH and TPS. With Edit you can change that stuff to suit your taste.




All times are GMT -5. The time now is 01:14 PM.