Mechanics

TRANSMISSION CLUNK WHEN SHIFT FROM 2ND T

1998 Isuzu Trooper

Transmission problem
1998 Isuzu Trooper XLS
6 cyl
Four Wheel Drive
Automatic
65000 miles

With the trooper fully loaded (5 adults and xmas tree on top) we started to hear and feel a " clunk" as the Trooper shifted from 2nd to 3rd, but nothing abnormal from 1st to 2nd or 3rd to 4th or during any downshift. This was on our way back from cutting down a XMas tree with very little offroad ( no 4wheel engaged ) and around 40 highway miles. I heard this could be due to " the bands" but am unsure of this. Any ideas? BTW: This vehicle has seen all major and minor services (oil every 3k. 30k, 60k and even 90 and 120k checkups eventhough it only has 65k miles on it). Transmission fluid has been changed every 3 years and all fuilds checked every weekend. Bottom line, this vehicle has been taken WELL care of.
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Tsuchida
December 25, 2007.



Make: Isuzu
Model: Trooper XLS
Year: 1998
Mileage: 65k
Engine Size: 3.5L

Maintenance: Transmission service at 30k. Oil changes every 3k. Major scheduled services.

Tiny
Tsuchida
Dec 27, 2007.
Got any idiot light concerning the transmission control module-Trans Check Light-

Lets try inspecting underneath for loose U-Joints engine and tranny mounts. That's okay start check ing the Transmission Converter Clutch solenoid-could also be the shifting solenoid for 2/3 hanging up or the band apply solenoid-

I don't recommend tranny flush-best way is to remove the valve body and check the shifting and apply solenoid for debris and thoroughly clean all the passages in it.

Good Luck

Rasmataz
Jan 12, 2008.
Thanks for the responce. : )

No idiot light concerning the transmission control module-Trans Check Light. No idiot light of any kind were displayed.

Just as a side observation. Wife and I took the Trooper out for a 40 mi each way drive on the highway and the issue did not reoccur. Also, this issue has not reoccured for her while she has driven the Trooper around town for several days. This leads me to think it was due to the hills and 5 human load that caused the clunk after 20 or so miles. Does this extra info still lend to your diagnostic recommendations?

I will check the items you recommended and again, many thanks for the input.

Tiny
Tsuchida
Jan 12, 2008.
Its probably bcuz of the load and it created a shift shock.

Rasmataz
Jan 12, 2008.