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Having a 3.4 swap done right now and ran into one issue...no were to connect S4 wire / 4th gera.
Vehicle is an 89 pickup auto 4x4 with 3.0
Donor was 2002 tundra 3.4 2wd auto
ORS says that you want to use a T100 ECU to avoid issue, so that is what we did.
The mechanic did all the wiring, no ORS harness at all.
All wires are connected and everything works except 2 things...below is the message from the mechanic.
"Your model year happens to be a hydraulic controlled t-case, so those two last wires (S4 & ECT PWR) directly connects into the ECU…S4 & PWR for ect is not present on t-100’s ECU so i’m stumped!"
“Notice the schematics shown for the 02 tundra and 96 t-100..
pwr (for ECT) and s4 connections are not present on both ECU’s”
So it drives and shifts fine, but wont go into 4th gear/ OD. AND...I guess the ECT things doesn't work...dont really care about that though.
Any advice...how to get an auto transmission to shift into 4th gear?
Originally Posted by TeamShiftPoint
1st one completed over a year ago. about 45k miles put on the 3.4 motor since the swap was completed.
(my cousin's)
1990 Toyota 4runner V6 4WD Auto
-3.4 motor from a 99 4runner
-using original stock 3.0 tranny and t-case (we rebuilt tranny, t-case, internal mods, valve body mod to handle the
3.4 power)
-TRD supercharger with 14psi pulley.
-tach works
-auto speed sensor works
-no CEL
smaller pulley
3.4 cruise control
working tach
jdm hilux spoiler
2nd one, about 1 year since swap. (friend's truck, about to do another swap for him into a 95 4runner
limited 4wd auto for his wife)
1993 Toyota Truck V6 4WD Manual
-3.4 motor from a 99 tacoma
-stock 5spd tranny
-TRD supercharger with 12psi pulley.
-tach works
-no CEL
recently we relocated the battery to the driver side, and installed the stock 3.4 airbox.
3rd one (mine), recently finished
1990 Toyota 4runner V6 4WD Auto
-3.4 motor from a 99 4runner
-using original stock 3.0 tranny and t-case (we rebuilt tranny, t-case, internal mods, valve body mod to handle the
3.4 power)
-TRD supercharger with stock pulley.
-tach works
-auto speed sensor works
-no CEL
some random pics of our trucks.
our friend Todd's toyota truck.
toyota trucks and other cars at the my shop
towing the drift car, is300 turbo.
3.0 tranny and t-case rebuilding pics
EDIT: picture link fixed.
Last edited by Sundown; 11-12-2022 at 04:18 PM.
Reason: Text is missing...only photos showed up.
Having a 3.4 swap done right now and ran into one issue...no were to connect S4 wire / 4th gera.
Vehicle is an 89 pickup auto 4x4 with 3.0
Donor was 2002 tundra 3.4 2wd auto
ORS says that you want to use a T100 ECU to avoid issue, so that is what we did.
The mechanic did all the wiring, no ORS harness at all.
All wires are connected and everything works except 2 things...below is the message from the mechanic.
"Your model year happens to be a hydraulic controlled t-case, so those two last wires (S4 & ECT PWR) directly connects into the ECU…S4 & PWR for ect is not present on t-100’s ECU so i’m stumped!"
“Notice the schematics shown for the 02 tundra and 96 t-100..
pwr (for ECT) and s4 connections are not present on both ECU’s”
So it drives and shifts fine, but wont go into 4th gear/ OD. AND...I guess the ECT things doesn't work...dont really care about that though.
Any advice...how to get an auto transmission to shift into 4th gear?
Sundown did you see the 3.4 sub under the Engine swaps forum? Might find info or answers there. Theres a ton of info.
Hey Coopster, thanks for trying to help. I did, I searched all over for hours and didn’t find much on swaps done with auto transmissions. Everyone seems to do manual, for a reason I guess. I only posted my question in a post done with an auto tranny.
11-12-2022, 04:14 PM
