gear ratios for 89+ automatic?
12-21-2009, 11:26 PM
#1
Race Director
Thread Starter
gear ratios for 89+ automatic?
Is the gear ratios for all 4 gears in the 89+ automatic the same as the earlier 2.20 rear end automatics? I looked in WSM but can't seem to find anything past 87S4 ratios..... I thought the 89+ cars had the 2.54 rear end + revised ratios in all the gears except 4th which is still 1-1?
The numbers I have for 4 speeds are this:
1st: 3.676
2nd: 2.412
3rd: 1.436
4th: 1.00
The numbers I have for 4 speeds are this:
1st: 3.676
2nd: 2.412
3rd: 1.436
4th: 1.00
12-22-2009, 12:03 AM
#2
Addict
Rennlist Member
Rennlist Member
Here are the numbers for a 91 S4, which should be the same as a 89 S4 auto:
1st: 3.87:1
2nd: 2.25:1
3rd: 1.44:1
4th: 1:00:1
Final Drive Ratio: 2.54:1
1st: 3.87:1
2nd: 2.25:1
3rd: 1.44:1
4th: 1:00:1
Final Drive Ratio: 2.54:1
12-22-2009, 12:04 AM
#3
Rennlist Member
Many changes to the '89 S4 auto box. check the SPec book for all details but here's the ratios:
Last edited by the flyin' scotsman; 12-22-2009 at 12:56 AM.
12-22-2009, 12:14 AM
#4
Race Director
Thread Starter
12-22-2009, 06:00 AM
#6
Rennlist Member
Brian,
You probably already know this, but I'm just winding-up a swap.
89 Auto box into 84 Auto.
Tight due to TC and TC cover being about 1 inch greater in diam than 84 unit.
But it fits with a little bit of clearance.
If for you LeMons racer, then you will need the 89 Bowden cable to which you make an engine-side mod.
You probably already know this, but I'm just winding-up a swap.
89 Auto box into 84 Auto.
Tight due to TC and TC cover being about 1 inch greater in diam than 84 unit.
But it fits with a little bit of clearance.
If for you LeMons racer, then you will need the 89 Bowden cable to which you make an engine-side mod.
Last edited by Landseer; 12-22-2009 at 06:17 AM.
