Yes, I planned on taking off the pan and doing a fluid and screen change
There are no alarms on the dash. The car DID sit for about 1 year prior to
my purchasing it.
I just took it out for a run tonight, and got it up to 95mpb. No shudders
or shakes. Starting at about 40mph I put it in “passing gear”, i.e.
kickdown, and it downshifted smoothly, and ran up to 95 and stayed there
with no problems. Its just when Im shifting from 1-2 2-3 at low
The fluid is definitely OLD but not burned. Ill do another post when the
pan is off.
On a related aside, on the top of the coolant expansion tank, around the
filler cap, theres some crust. It looks like coolant spatter at one time
(or more than one time). I noticed this on a some pictured of a few Jags
on Ebay. Does this indicate that the car overheated at one time?
Overheating will affect the transmission too, right?
Since Ive had the car, I have not seen any fluid come out of the expansion
From: email@example.com [mailto:firstname.lastname@example.org]On
Behalf Of Brett Gazdzinski
Sent: Friday, April 05, 2002 11:29 PM
To: ‘Mike Pukmel’; email@example.com
Subject: RE: [modern] 90 Sov. Transmission Shifting Poorly When Warm
I would pull the pan and check the filter and magnets.
The filter is just a screen, and you can wash it out
and dry it, but the correct filter has a spout
out the bottom…the incorrect filter has a hole
on the side.
The magnets will likely have a bit of fuzz on them,
this is normal.
I would suspect a problem from the trans sitting
and not a serious mechanical problem.
No trans alarms on the dash?
The 1990 transmission is electronic operated.
It has its own throttle position sensor built
into the engine throttle position sensor, it has a speed
sensor on the tail shaft (like the abs sensors), a pressure
reporting sensor, and the gear change solenoids.
The transmission ecu DOES output an ignition timing retard
signal during shifts to the main engine ecu.
If the transmission ecu is getting the wrong signals
from the throttle, the pressure, the speed, etc,
shifting can go wacko.
Gummed up valves can also cause problems, and they can change
After checking the pan and filter, try some synthetic trans fluid,
the stuff for the new cars.
Even old fluid should not be burnt or dark…
While waiting for the manual to arrive for my 90 XJ6
Sov. 109k, new
bearings for the diff sitting on the garage floor, the
started to do something awful. I have only been driving the
car once a week
or so until I can get the diff fixed and all the other
Right after a cold start, the transmission shifts OK
1-2, 2-3, 3-4.
As the car warms up, about 5 miles, shifting gets sloppy.
1-2, 2-3 feels like I’m letting off the accelerator for a
when the car warms up to temp, shifting 1-2, 2-3 also
develops a “thump”, a
hard shift. Ive seen posts on the list from you with these
cars having 150K
and 180K miles, so its very discouraging for a car with 109k.
The fluid does not appear to be low. I check after
driving for a
while (engine idle, trans in park): the first time I pull
the stick out,
its dry. I put the stick back in, pull it out, and its very
near the top
“HOT” mark. The fluid is old (planned on replacing it
after the bearning
job), but not excessively burned. There’s no evidence that the car
overheated, but its an old cat and I don’t have any history on it.
It does not sound like a inexpensive fix, but anyone
experiences with a good outcome?