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Difference between 4eat's?
Posted: Sun Apr 25, 2004 4:33 pm
by THAWA
Is there any difference between the turbo and na versions of the 4eat? I know the 5mt's are different because of the type of clutch but does anyone know if the 4eats for the turbo are diff in any way?
Posted: Sun Apr 25, 2004 4:54 pm
by vrg3
Yes, they are different.
Let me thumb through my 92 FSM:
The Turbo 4EAT has a higher ATF capacity.
And, apparently at least in 1992 it has different 1st and 2nd gear ratios.
The clutches all appear to have more plates. I guess that makes it easier for them to transfer more torque?
The torque converters are different, too, if I remember another post right. You may want to search on that.
I know the TCUs are different, too. That's probably just because the engine torque curves and the gear ratios are different and so shift points have to be different for smooth shifting. And also for 1990-1992 models the turbo ones have to make do without a barometric pressure signal from the ECU.
Posted: Mon Apr 26, 2004 1:50 am
by THAWA
Cool beans, though I cant say I agree with the last statement
Posted: Mon Apr 26, 2004 1:53 am
by vrg3
Okay. For 1991 and 1992 models. Sheesh.
Posted: Mon Apr 26, 2004 1:54 am
by THAWA
Posted: Mon Feb 20, 2006 9:57 pm
by Subtle
From the 1993 Owners Manual 4eat AWD models
NA Turbo
3.027 2.785
1.619 1.545
1.000 1.000
0.694 0.694
Final Drive Ratio 3.90 Both
Fluid Capacity
8.8L 9.4L
Engine Coolant
5.9L 7.0L
