2005 suzuki reno code po734

Lots! (can talk this all day) (a/t are no simple)
find a smarter shop!
going to a transmission shop they go , gee, that is all we know
here, swaps (or rebuilds only) AAMCO?
first stop is:
try a real ASE mechanic that can do the many tests on car.
called ON CAR tests, in the FSM
all my answers are for usa, cars,if not ignore all my posts.

https://suzukipitstopplus.com/Products/1064-2005-forenza-reno-service-manual.aspx

$4 and is ReAL, not fake or cloned'

goggle find my ASE shop, BINGO.
type zip bingo2.

700 means tranny errors, any. (ignore
734 ( serious)
check levels yet, per above method(link?) step by step?
check fuses just in case.
oddly this car has a separate TCM tranny brain,
that drives 6 solenoids inside the box.
most suzuki a/t there is a secret( in fsm on all that do)
manual test mode. on most you un plug TCM connector and drive
to see if 4th gear really does slip, my guess is yes.
if yes slips, its bad trans, of no slip bad solenoid.
watch out manual mode can skip gears, #2 or 3, so test only 4.

replace the valve body, we do on regular trans, not sure
if that works on this transaxle type? (i dont have the book on this box)
in my shop i can hot wire solenoid(before retired)
this proves not TCM and is in the box
then i check solenoid coil ohms. 10 ok , 0 bad infinity bad.
10 can be 20 , idont know, the book above tells coil spec.
the soleniods can be bench tested.
but takes a real ASE MECH, NOT AFRAID TO DO ALL FSM CHECKS ON CAR. FACT.


fsm quote

Trouble Code: P0734 (2.0L L4 VIN - Auto)
4thGearr Incorrect Ratio (or slips)



Number of Trips to Set Code: 1

Trouble Code Conditions:
TCM detects any inconsistency in the actual gear ratio.

Possible Causes:

Input clutch solenoid valve

Front brake solenoid valve

Direct clutch solenoid valve

High and low reverse clutch solenoid valve

Each clutch

Hydraulic control circuit