1997 Isuzu Rodeo LS Transmission Problem

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1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Wed Apr 22, 2015 10:15 am

Hello, I need Help!!!

I have a Isuzu Rodeo that has a troubled Automatic Transmission :(

I Accelerate to about 20 miles a hr in 1st or 2nd and it wont go faster, the RPM's keep going up
and it feels like its in neutral until I drop to about 15 mph then it seems to go back in to gear.

Some times if I really stomp on the Gas and get my momentum going it will shift in to 3rd and go faster.

All lights on the Dash correspond to the shift selector, except for the "D" wont lite up.

And if I press the Winter Mode Button, the transmission disengages (feels like neutral).

I removed the Range Mode Selector, it's the Triangle shaped device on the drivers side of the trans and
cleaned it and re greased it and reinstalled it, but it still exhibits the exact same symptoms.

Is it a electrical problem? Bad ECU or a Burned Wire?

Any Ideas, fixes, or advice would be appreciated....

Thanks a Bunch!!!
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Buster28 » Wed Apr 22, 2015 12:42 pm

You have two separate problems. If the D gear selection lamp won't illuminate it is probably the lamp itself because if the 3rd gear lamp works the Range Mode Switch (RMS) and wiring to the PCM have to be working OK.

When you shift into 3rd or select 3rd using Winter Mode and have no drive the 3rd clutch is slipping. The only solution is to rebuild the transmission.
You can confirm this by disconnecting the the 7 Pin transmission case connector located next to the RMS. This will place the transmission in a non electrical shift mode and L = 1st gear 2 = 3rd gear and 3/D = 4th gear. In this mode if you only have 1st, the 3rd clutch is toast.
02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6

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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Wed Apr 22, 2015 7:58 pm

I found a 5 pin connecter next to the RMS....

Is the 7 pin plug wired to the RMS? or is it something different?
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Buster28 » Wed Apr 22, 2015 9:12 pm

Sorry I stuffed that up, 90-99 transmissions have a 4 pin main case connector and a 5 pin overdrive section connector. Disconnect the 4 pin.
02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6

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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Wed Apr 22, 2015 9:58 pm

I can't find a 4 pin connecter....

All I see going into the Trans is the 5 pin and the RMS :(

Where would the 4 pin be located?

Thanks a Bunch
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Buster28 » Thu Apr 23, 2015 3:41 am

The transmission case connector your looking for is the vertical black connector just to the rear of shift cable. The large pan is the transmission and the small pan is the overdrive section.
Click on image to expand.
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02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6

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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Thu Apr 23, 2015 10:59 am

Found it.... It was Hiding behind the exhaust pipe :)
Thank you for the picture...

So I disconnected the 4 pin plug and took it out for a drive around the block.

Put in in "R" backed up fine out of the parking stall
Put it in "L" and it ran great... Got it up to 30 mph....
Put it in "2" and it Just revved like it was in Neutral
Put it in "3" same thing, revved like Neutral
Put it in "D" revved like Neutral

Kind of odd because before i disconnected the 4 pin if I really stomped on the Gas
and got the momentum up it would shift and go faster.

What do you think?

Thanks a Bunch!!!
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Woofie » Thu Apr 23, 2015 11:22 am

What's the history on this ole girl? You the original owner?
1997 Rodeo 3.2L V6 Auto - otherwise known as "Ramblin Fever"
LT265/75 16 Duratrac's; Loadwarrior Luggage rack; 3" lift; Kenwood HD tuner
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Buster28 » Thu Apr 23, 2015 12:00 pm

Metal Brain wrote:Kind of odd because before i disconnected the 4 pin if I really stomped on the Gas and got the momentum up it would shift and go faster.
What do you think?


With the 4 pin connector in place the TCM is controlling the shift solenoids and the transmission could shift into 2nd gear. In 2nd gear the reaction drum brake band is applied and the 2nd clutch is applied.

With the connector removed the TCM is not controlling the shift solenoids and 2nd gear cannot be selected. When you place the shifter in the 2 position, 3rd gear is selected. In 3rd gear, the 2nd and 3rd clutches are applied and the band is released. Since the 3rd clutch is slipping there is only one input to the planetary gear set which does not produce any output torque.
02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6

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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Thu Apr 23, 2015 5:18 pm

Buster28 wrote:With the 4 pin connector in place the TCM is controlling the shift solenoids and the transmission could shift into 2nd gear. In 2nd gear the reaction drum brake band is applied and the 2nd clutch is applied.

With the connector removed the TCM is not controlling the shift solenoids and 2nd gear cannot be selected. When you place the shifter in the 2 position, 3rd gear is selected. In 3rd gear, the 2nd and 3rd clutches are applied and the band is released. Since the 3rd clutch is slipping there is only one input to the planetary gear set which does not produce any output torque.



Hey Buster28

What do I need to do?

Is it a Shift Solenoid that needs to be replaced?
or do I have to adjust the band?
or is the TCM Bad?

Thanks a Bunch!!!
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Buster28 » Thu Apr 23, 2015 7:55 pm

Metal Brain wrote:What do I need to do?


Imho the 3rd clutch is toast, the solution is to replace or rebuild the transmission.
02 Rodeo Sport 4X4 3.2L V6
01 Rodeo Sport 4X4 3.2L V6

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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Thu Apr 23, 2015 10:56 pm

Buster28 wrote:
Imho the 3rd clutch is toast, the solution is to replace or rebuild the transmission.



Are there any videos to rebuild the 4L30E???

Can I rebuild it by just replacing the 3rd clutch Packs???

Thanks a Bunch!!!
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby MarcusInMD » Thu Apr 23, 2015 11:33 pm

See my thread here:

viewtopic.php?f=4&t=78287

That will give you an idea of what is involved. If you tear it apart, clean everything ad rebuild the whole thing - seals and gaskets along with the stuff that failed.
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Re: 1997 Isuzu Rodeo LS Transmission Problem

Postby Metal Brain » Fri Apr 24, 2015 7:35 pm

Thanks Buster For all your Help....

I think I am just going to sell it....

Thanks again
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