[xj-s] tran th400 89xjs hard to say slips in 1st gear

this car is my first cat shes been great up till know put 2000
miles scince I bought her. 1000 in one trip across USA ok hear it
gos put in r and a clunk sometimes now 1st kind of a shuder not a
stedy slip 2 gear pulls great 3 same know hear comes the strange
part put in N give some gas trys to move forward same in
park??? she sat for a copple of years before I got her please
help !!! I miss the power under my foot lol–
auggiedoggie
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In reply to a message from auggiedoggie sent Sun 20 Dec 2009:

‘‘Been sitting for a couple of years’’, is screaming for a trans oil
service, in my opinion.

The T400 is STRONG, but like any auto trans, it just loves fresh
oil and a clean filter every couple of years.

Now this may not fix it, but it will at least eliminate the fluid,
and the cost is minimal.

There may be many other items causing your grief, but start at the
beginning, and give it a service, and make sure the fluid level is
correct.

Grant Francis
Downunder–
The original message included these comments:

stedy slip 2 gear pulls great 3 same know hear comes the strange
part put in N give some gas trys to move forward same in
park??? she sat for a copple of years before I got her please
help !!! I miss the power under my foot lol


85 XJSV12 (Her Cat), '96 X300 XJ6 3.2l (My Cat)
Adelaide South Austarlia, Australia
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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I would agree with Grant regarding the concern for gummy fluid and
filter if the vehicle has sat unused for several years.

Do you hear a “turbine-like whine” when the car is idling in Park, if
you bend down and listen below a door sill? If so, IMMEDIATELY flush
the old fluid, change the filter and refill. That whine is caused by
pump cavitation or restriction at the pickup due to a plugged filter
screen and thick fluid, and with colder ambient temperatures, the
problem gets worse.

If the clutch in 1st is already chattering or slipping when you engage
a forward gear, damage requiring a rebuild may already have occurred.
When you drop the pan, check the pan magnet (take some photos) for
metal filings or shards and let us know what you find. You have to
drop the transmission mount to get the pan off, so let us know if you
need help with that procedure. Also, it would be advisable to have a
new rubber spool/bushing for the transmission mount before you do that
procedure.

George Balthrop, Clifton, VA USA
89 and 85 XJ-S Coupes; 89 XJ40 VDP-----Original Message-----
From: auggiedoggie auggiedoggie41@yahoo.com

put in r and a clunk sometimes now 1st kind of a shuder not a
stedy slip 2 gear pulls great 3 same know hear comes the strange
part put in N give some gas trys to move forward same in
park??? she sat for a copple of years before I got her

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auggiedoggie wrote:

…put in r and a clunk sometimes now 1st kind of a shuder not a
stedy slip 2 gear pulls great 3 same know hear comes the strange part
put in N give some gas trys to move forward same in park??? she
sat for a copple of years before I got her please help !!!

Hmmm. I suppose there’s a possibility that the cable between the
shifter and the transmission isn’t right, and that’s leading it to be
a bit out of gear or between gears when it’s supposed to be in gear.
The cable connection in the console is pretty solid, but the
connection at the transmission is a joint that, IIRC, can possibly
slip. It might be worth getting under there and taking a look at it,
and perhaps loosening the device that clamps onto the end of the
cable, repositioning it, and locking it back down.

It might also prove necessary to drop the transmission pan, install
new O-rings (two) in the filter, and button it back up. That’s not
as easy as it sounds, though, because you get involved with the
transmission mount getting the pan off. Fiddle with the cable first,
that’s easy, if it doesn’t help then consider dropping the pan.

– Kirbert

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