1987 Jeep Cherokee : AISIN Warner : Question
kjlou...@earthlink.net
VIN# xJCMRxxxxHTxxxxxx with a RENIX ECU and
Aisin Warner 30-40LE Transmission
============================================================
Any AISIN Warner Wizards out there?
What would be the reason the overdrive mechanism will not activate?
6 months ago I had a leak on the transmission line to the radiator. I
temporarily lost all but 1st and 2nd gear while driving on interstate,
repaired the leak, and refilled with proper fluid. No burn smells from
the old fluid. I have all 4 gears and they upshift and downshift as if
it is brand new �-smooth, no noise, no vibration. Reverse sometimes has
a slight engagement kick ( one in a blue moon ).
At 70 mph, I am in 4th @3100rpms and Overdrive isn�t taking over to
bring rpms down to normal 2300rpms. Mechanical? Electrical? Internal?
External?
Wizard advise is appreciated !!!
Thanks,
Ken
DougW
> 1987 JEEP CHEROKEE CHIEF, 4Door,4WD, 6 cyl 4.0L Automatic
> VIN# xJCMRxxxxHTxxxxxx with a RENIX ECU and
>
> Aisin Warner 30-40LE Transmission
> ============================================================
>
> Any AISIN Warner Wizards out there?
>
> What would be the reason the overdrive mechanism will not activate?
>
> 6 months ago I had a leak on the transmission line to the radiator. I
> temporarily lost all but 1st and 2nd gear while driving on interstate,
> repaired the leak, and refilled with proper fluid. No burn smells from
> the old fluid. I have all 4 gears and they upshift and downshift as if
> has a slight engagement kick ( one in a blue moon ).
>
> bring rpms down to normal 2300rpms. Mechanical? Electrical? Internal?
> External?
>
> Wizard advise is appreciated !!!
>
> Thanks,
> Ken
Just a punt here, but it might be the computer needs resetting
because you went into "limp home mode". So disconnect the
battery for about half an hour then reconnect. Drive around
the block a few times (no heavy use of the pedal) Then get
out on the highway so it can go up through all the gears.
--
DougW
L.W.(Bill) Hughes III
I only see your post via Doug's.
You have an electronically controlled four-speed automatic transmission.
Features selectable shift modes, power and comfort. The power shift provided
better performance through higher-rpm up-shifts and faster downshifts, while
the comfort mode was a much more relaxed shift, and also much more
economical in its operation. If you are operating your transmission in the
"Tow / Haul" mode, (switch on dash) the transmission will shift to 3rd gear
and 4th only will be enabled under steady cruise conditions.
God Bless America, Bill O|||||||O
mailto:BillH...@billhughes.com
http://www.billhughes.com/jeep_bookmark.htm
> > 1987 JEEP CHEROKEE CHIEF, 4Door,4WD, 6 cyl 4.0L Automatic
> > VIN# xJCMRxxxxHTxxxxxx with a RENIX ECU and
> >
> > Aisin Warner 30-40LE Transmission
> > ============================================================
> >
> > Any AISIN Warner Wizards out there?
> >
> > What would be the reason the overdrive mechanism will not activate?
> >
> > 6 months ago I had a leak on the transmission line to the radiator. I
> > temporarily lost all but 1st and 2nd gear while driving on interstate,
> > repaired the leak, and refilled with proper fluid. No burn smells from
> > the old fluid. I have all 4 gears and they upshift and downshift as if
> > it is brand new --smooth, no noise, no vibration. Reverse sometimes
PeterD
Does one this old have a computer control?
DougW
> On Tue, 1 Dec 2009 11:58:28 -0600, "DougW" wrote:
>> Just a punt here, but it might be the computer needs resetting
>> because you went into "limp home mode". So disconnect the
>> battery for about half an hour then reconnect. Drive around
>> the block a few times (no heavy use of the pedal) Then get
>> out on the highway so it can go up through all the gears.
>
> Does one this old have a computer control?
Like I said, just a punt. I've seen various types of electrical
controls on the older transmissions. Generally if you have an OD
button/lockout on the dash then it has to have some electronics
even if it's just a solinoid.
--
DougW
PeterD
Good point...
However, I'm not optimistic about the OP's situation--my experience
with transmissions that drain while being driven has not be good,
usually they are toast by the time one realizes there is a problem.
L.W.(Bill) Hughes III
1987-1990 4.0 L, 242 CID AMC 242 I6, 173 hp with Renix fuel injection
system. Ford and GM injection from 1980, that of course would need a
computer, too.
God Bless America, Bill O|||||||O
mailto:BillH...@billhughes.com
http://www.billhughes.com/jeep_bookmark.htm
"PeterD" <pet...@hipson.net> wrote in message
news:pirch5pk5d19fdd7r...@4ax.com...
kjlou...@earthlink.net
I know I have a TCU under the passenger dash, a Renix under the driver
dash, and a yellow adjustable AMC box (i think it has something to do
with the cruise control -- but not too sure). Could my problem be in the
Neutral safety switch (mounted on the passenger side of the
transmission? I have changed out the ECU recently and the TPS having the
battery disconnected for hours at a time, and grandma type driving after
reconnecting it.
If it weren't for noticing the higher rpms, not feeling the OD planetary
engaging in (a 5th gear of sorts), and having to milking out 16mpg with
a light foot, there would no way be to realize a problem.
I do have a comfort switch only (I driven it through tanks of gas on
both settings; no other transmission switch on the dash. "Tow/Haul
switch"??? I do have a 4WD shifter, 2WD, 4H, N, 4L (all of it's
functions are excellent)
Any of this stirs any additional ideas where a problem would likely be?
Thanks In Advance,
Ken
L.W.(Bill) Hughes III
The "comfort switch" is the switch for towing. If that doesn't give you
overdrive, then you have a bigger problem.
God Bless America, Bill O|||||||O
mailto:BillH...@billhughes.com
http://www.billhughes.com/jeep_bookmark.htm
<kjlou...@earthlink.net> wrote in message
news:4B193F5D...@earthlink.net...
PeterD
>Thanks, Peter, Doug, Bill for responding.
>
>I know I have a TCU under the passenger dash, a Renix under the driver
>dash, and a yellow adjustable AMC box (i think it has something to do
>with the cruise control -- but not too sure). Could my problem be in the
>Neutral safety switch (mounted on the passenger side of the
>transmission? I have changed out the ECU recently and the TPS having the
>battery disconnected for hours at a time, and grandma type driving after
>reconnecting it.
Could be the brake light switch, remotely... At least some vehicles
unlock the TCC, and drop out of OD when brakes are applied.
kjlou...@earthlink.net
When you posted TCC, are you saying the transmission control unit (TCU)
(also known as the TCM <module> or TCC <computer>? I understand your
reply post as such....
Now you may be on to something!!! The BRAKE LIGHTING (as screwed up as
it may sound) is wired through the transmission's neutral safety switch
(NSS) on the side of the transmission. I have had suspicions about the
contacts in it since the summer (aged case seal and contact point erosion).
The truth is I have had suspicions about EVERY PART OF THE DAMNED THING
(smiles).
The more I think about it, I fiddled with the steering column around May
to (1) tighten the swivel, and (2)replace the ignotion switch below, and
YES, I remember adjusting the brake sensor at the peddle!!!! OUCH!
I think you've have given me the solution... I'll post when I get a
result one way or the other.....
Thanks,
Ken
(PS: Thanks Bill too)
PeterD
>Hi Peter,
>
>When you posted TCC, are you saying the transmission control unit (TCU)
>(also known as the TCM <module> or TCC <computer>? I understand your
>reply post as such....
Torque converter control AKA torque converter lockup... Found on some
older automatics, and most newer ones. May not be applicable on your
vehicle, I'm not sure.
>
> Now you may be on to something!!! The BRAKE LIGHTING (as screwed up as
>it may sound) is wired through the transmission's neutral safety switch
>(NSS) on the side of the transmission. I have had suspicions about the
>contacts in it since the summer (aged case seal and contact point erosion).
>
>The truth is I have had suspicions about EVERY PART OF THE DAMNED THING
>(smiles).
>
>The more I think about it, I fiddled with the steering column around May
>to (1) tighten the swivel, and (2)replace the ignotion switch below, and
>YES, I remember adjusting the brake sensor at the peddle!!!! OUCH!
>
>I think you've have given me the solution... I'll post when I get a
>result one way or the other.....
Please do keep us updated!
kjlou...@earthlink.net
When you posted TCC, are you saying the transmission control unit (TCU)
(also known as the TCM <module> or TCC <computer>? I understand your
reply post as such....
Now you may be on to something!!! The BRAKE LIGHTING (as screwed up as
it may sound) is wired through the transmission's neutral safety switch
(NSS) on the side of the transmission. I have had suspicions about the
contacts in it since the summer (aged case seal and contact point erosion).
The truth is I have had suspicions about EVERY PART OF THE DAMNED THING
(smiles).
The more I think about it, I fiddled with the steering column around May
to (1) tighten the swivel, and (2)replace the ignotion switch below, and
YES, I remember adjusting the brake sensor at the peddle!!!! OUCH!
I think you've have given me the solution... I'll post when I get a
result one way or the other.....
Thanks,
Ken
(PS: Thanks Bill too)