|
Low FIRST Gear 904 transmission
#800559
09/13/10 09:28 PM
09/13/10 09:28 PM
|
Joined: Aug 2009
Posts: 151 Northern Virginia
barracuda7
OP
member
|
OP
member
Joined: Aug 2009
Posts: 151
Northern Virginia
|
I want a Low 1st Gear for my 904.
I did a lot research and it seem to come "if I want Low 1st Gear, I will have Low 2nd Gear". Like the 904 Ratio is: 2.45/1.45/1 if I change/swap to Low 1st Gear, it will be: 2.74/1.54/1 , no other option.
But I want 2.74/1.45/1
After study the 904 by myself, I release that if I want Low 1st Gear, I will need new REAR ring gear & smaller Sun Gear(other side Sun Gear stay the same 28 teeth)and possibility new Low-Reserve Drum.
Anyone make a Gear Set to lower 1st gear ratio only?
Or anyone have modify the 904 that way, can you please let me know how did you do?
Thank in advance
Last edited by barracuda7; 09/13/10 10:04 PM.
|
|
|
Re: Low FIRST Gear 904 transmission
[Re: Wedgeman]
#800562
09/14/10 03:19 PM
09/14/10 03:19 PM
|
Joined: Aug 2009
Posts: 151 Northern Virginia
barracuda7
OP
member
|
OP
member
Joined: Aug 2009
Posts: 151
Northern Virginia
|
Quote:
Another option would be to pick up an A999 trans with 5 disc clutch and stronger internals...
Dan
This swap will completely changed ratio at BOTH 1st Shift and 2nd Shift.
I need lower ratio at 1st Shift only, this ever done before?
|
|
|
Re: Low FIRST Gear 904 transmission
[Re: Wedgeman]
#800565
09/15/10 12:28 AM
09/15/10 12:28 AM
|
Joined: Aug 2009
Posts: 151 Northern Virginia
barracuda7
OP
member
|
OP
member
Joined: Aug 2009
Posts: 151
Northern Virginia
|
Quote:
Why would you want to go slower after a faster launch ?
Dan
I dont want go slower after a fast launch.
In my opinion, after launch hard at 1st Shift, the car already had the momentum, so the higher 2nd Gear ratio(1:45)will force car move more faster (compare to lower 2nd Gear ratio(1:54))
Otherwise(when the car has momentum)lower 2nd Gear ratio(1.54) will hold the engine revving at high RPM but not really good for acceleration.
|
|
|
|
|
|