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

Problems associated with underdrives in a4 tranny

Thread Tools
 
Search this Thread
 
Old 12-25-2005, 06:32 PM
  #1  
11 Second Club
Thread Starter
iTrader: (6)
 
02NBMFormula's Avatar
 
Join Date: Jan 2005
Location: Jax, Fl
Posts: 742
Likes: 0
Received 0 Likes on 0 Posts

Default Problems associated with underdrives in a4 tranny

what are the problems associated with using a underdrive in a a4 with cam and headers??? trying to decide to get one for my daily driver.
Old 12-26-2005, 02:10 AM
  #2  
TECH Senior Member
iTrader: (6)
 
WILWAXU's Avatar
 
Join Date: Nov 2001
Location: League City, TX
Posts: 14,378
Likes: 0
Received 1 Like on 1 Post

Default

None that I noticed.
Old 12-26-2005, 05:56 AM
  #3  
TECH Fanatic
iTrader: (1)
 
227Hawk's Avatar
 
Join Date: Nov 2001
Location: Turlock, Ca
Posts: 1,735
Likes: 0
Received 0 Likes on 0 Posts
Default

I'm running an underdrive w/ a pretty big system. I just can't crank the sounds for
any length of time idleing, it will discharge. But for a more normal stereo system go
for it!!!!!!!!!!!!!!
Hawk
Old 12-26-2005, 02:35 PM
  #4  
Staging Lane
 
02NHRA's Avatar
 
Join Date: Sep 2005
Posts: 51
Likes: 0
Received 0 Likes on 0 Posts
Default

If your cam is big and causes idle issues, the underdrive will make it worse...properly tuned though everything should be fine
Old 12-26-2005, 10:29 PM
  #5  
TECH Regular
iTrader: (4)
 
REDWS6ROCKET's Avatar
 
Join Date: Jul 2004
Location: Blue Springs, MO
Posts: 471
Likes: 0
Received 0 Likes on 0 Posts

Default

i plan on doing one this winter. from all my searchs i have found them not to affect an driveabablity at all. unless like mentioned you have a big stereo!
Old 12-26-2005, 10:58 PM
  #6  
TECH Fanatic
iTrader: (1)
 
BubaGumpShrimp's Avatar
 
Join Date: Jul 2003
Location: edison, nj
Posts: 1,095
Likes: 0
Received 0 Likes on 0 Posts

Default

2 simple solutions 1. raise the idle, with a bigger then stock cam chances are its already higher then stock. 2. get an overdrive alt pulley, and no you really wont loose power to the ground with one(it takes 2 hp to turn a 100amp alt under full load)
Old 12-27-2005, 10:25 AM
  #7  
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

None. worked fine for me when I was bolt-on with a stock idle. Once you have a cam and an 800 rpm idle, the underdrive will turn the accessories at the same rpm as when the car was stock.




All times are GMT -5. The time now is 12:53 PM.