HELP! 97 TJ Transmission Problem!
97tjMike
I was offroading today in a mud pit. After having a lot of fun, I was
driving around in the mud pit, and suddely my transmission went into
neutral, and I was unable to shift into any gears. No bang, boom,
nothing. I didn't hit anything. I didnt' feel anything. Just suddenly
I looked at my RPMs and then were way up and found out I was in
Neutral. Unable to move in any gear (automatic transmission), and yes
I tried moving the transfer case in and out of 4x4 etc., I was towed
away from the mud and was able to take a look. Nothing seemed out of
the ordinary. We tried it again and it started moving, but was
accomponied by a loud wining sound. The Jeep drives but if I rev the
engine, the sound got louder (this sound does NOT occur in park, even
if I rev it). So I went onto pavement, and got to around 15/20 MPH,
which was at way higher RPMs than normal, and them my transmission
slipped back into neutral and the noise went away. So then I put it
into park and back into D a couple of times, and pulled the E brake
and let it back down (sounds unrelated I know but that seemed to
influence it) and then I'd hear the noise again and it'd move but slip
along. What's going on? Currently I can't drive my Jeep and I'm gonna
have to tow it somewhere, but I'd like an idea or something. Maybe my
fluid is low? I checked the fluid and its the right color but I
haven't checked the level yet. Maybe this is unrelated to the
offroading and the transmission had a problem waiting to happen
anyways? Please help.
Thanks,
Mik
97 TJ
68,000 Miles
Auto Tranny
XS11E
> Maybe my fluid is low? I checked the fluid and its the right color
> but I haven't checked the level yet.
I'd check the level first, if it's OK you'll need to tow it to a shop.
97tjMike
I'll do that ASAP. Also I didnt mention, its been sitting now for a
while and no leaks anywhere.
c
If it doesn't move in any gear, it is probably something wrong in the
transmission pump. Usually, but not always, if a seal or clutch goes bad
you will only lose 1 or 2 gears. Most transmissions have 2 or 3 pressure
ports at the side of the case. If you know someone that has the service
repair manual for your trans, you can get the pressure specs and hook a
gauge to the ports. If the pressures at all the ports are low, then the
pump has failed. If only one of them is low, then a seal on one of the
pistons has let go, or possibly there is a valve stuck in the valve
body. Whatever you do, do not try to drive it anymore!!! If the pressure
is low from the pump, trying to move it will only damage the band(s) and
clutches. If the pump is in fact bad, you can just have the pump serviced.
Before you do that though, I would drain the fluid and see if there is
any sign of clutch facing material in the pan. If the fluid is full of
crud, then it's probably rebuild time.
Several transmissions have had service problems with the pumps caused
from the rotors or vanes in the pump cracking, or even sticking. Could
also be a seal in the pump.
Like I said though, it is imparitive that you do NOT try to move it any
more under its own power until you find the problem. It could save you a
complete rebuild.
Chris
97tjMike
transmission can be the nail in the coffin. should I ask a shop before
doing anything?
Earle Horton
news:1179057785....@n59g2000hsh.googlegroups.com...
> I've read otherwhere on these forums that changing fluid on a dying
> transmission can be the nail in the coffin. should I ask a shop before
> doing anything?
>
coffin. If you have a decent place to work on it, you won't harm anything
by dropping the pan to see what kind of crud has collected in the sump. You
are probably going to have it towed to a transmission shop anyway. There is
a slight chance that your problem is a clogged filter, and that changing it
will make everything right.
Earle
97tjMike
fluid.....apparently mud found its way in and I'm really mad at myself
for mud bogging. But anyways I'm gonna try cleaning it out with brake
parts cleaner, and flushing it a couple of times. And of course a new
filter. Hopefully that's all it needs, but I can't imagine the pump
enjoyed having mud run through it.
c
I would also recommend pulling the cooler lines and flushing them out.
Hopefully the filter stopped the crud from going in to the internals of
the trans, but I would flush everything just as a precaution.
That med would clog the filter up real fast, so that would explain why
your trans did what it did.
If it fixes the problem, I would change the fluid and filter one more
time after you run it for a few days because most likely there will
still be some crud in the nooks and crannies.
Good luck.
Chris
L.W. (Bill) Hughes III
you may find that out. Then again many times I've pulled the pan and parts
would fall out, making it not worth re-filling, and custom would have it
towed to their favorite transmission repair shop.
God Bless America, Bill O|||||||O
mailto:LWHug...@aol.com http://www.billhughes.com/
"97tjMike" <Michae...@gmail.com> wrote in message
news:1179057785....@n59g2000hsh.googlegroups.com...
> I've read otherwhere on these forums that changing fluid on a dying
> transmission can be the nail in the coffin. should I ask a shop before
> doing anything?
>
--
Posted via a free Usenet account from http://www.teranews.com
XS11E
I hope it works but, if everything is OK mud shouldn't have been able
to get in there, just how deep in the mud were you? <G>
97tjMike
Well I was under the impression that I was ok to go up to the air
intake. I didn't get quite that high, but apparently high enough to
get to the transmission vent tube?
Earle Horton
Earle
"97tjMike" <Michae...@gmail.com> wrote in message
news:1179142252....@w5g2000hsg.googlegroups.com...
RoyJ
a cetain amount of luck rejuvinating trannys (and engines) by a couple
of quick drain and refill cycles. Can't hurt at this stage.
97tjMike
i went to the shop and got a transmission flush (100% fluid exchange,
or so they said). Now it drives but its a little hard to accelerate
from a stop and sometimes it wont shift until 3000 RPM. I think my
next step is to bring it in. Suggestions?
c
Those transmission flushes really don't exchange all the fluid, but most
of the places that do them claim they do. There is always fluid in the
torque convertor that doesn't get replaced, but obviously it is better
than not doing it at all.
Anyway, when you say hard to accelerate, what exactly do you mean? If
you mean that the engine revs up then the transmission engages, then you
probably have clutches that have been damaged, a piston seal with dirt
preventing it from sealing, or a valve stuck in the valve body.
It is very possible that a piece of dirt got stuck in one of the valve
body bores and that there could be a valve sticking. It really doesn't
take much dirt to stick a valve in a bore. This would explain a possible
reason for the high shift point.
If you are 100% SURE the transmission isn't slipping, then I would try
driving it for a while and then doing one more flush. The second option
would be to have a good transmission shop pull the valve body and take
it apart and clean it. The valve body controls the transmission,
including when it shifts, how much pressure is applied to the clutches,
and a lot more. One stuck valve in there can wreak havoc on the whole
transmission.
Chris
97tjMike
Well I talked to a trusted guy at a shop and he mentioned the valve
and possiblly one other thing (some electrical sensor I think). He
said that the clutch may be receiving incorrect information from the
gas pedal as to how much pressure it needs to do its job. When I start
from a stop (sometimes) It'll kind've buck back at me and then finally
catch, and I'll (again only sometime) feel a rumble and it'll go,
feels like the clutch is sticking. Anyways he told me that I can bring
it down there and he'll throw it on his machine and drive it a bit to
figure out the problem w/o charging me, so that's my next step
tomorrow morning. Thanks for everyone's help.
Mike Romain
He also should clean the connection on the TPS because it also controls
the shift points and can get dirty.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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