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You're right the "shudder" is only when shifting into the last gear.
It's been more than two weeks since the drain and refill and I still have it.
A drain and refill is not enough, that is only 4 qts if you're lucky, so 4 out of 13 qts.

You can disconnect the return line from the radiator, run it into a pan, and run the car until it starts to sputter. Helps to have someone in the car to shut it off while you're watching so it doesn't pump air for more than a second. Then drain what's left in the pan, and drain the torque converter. That should get you around 11 1/2 qts. Be sure to measure it, old 5 qt oil jugs are good for that.

$80 for new fluid cost the same as one hr at a shop, and most shops consider a fluid change to be just dropping the pan, which you have already done.

Al
 

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Discussion Starter · #22 ·
As an update to this thread I started in 2012. On the advise of my local transmission specialist I finally bit the bullet and had my T/C rebuilt. They were pretty sure the gearbox itself was ok, and the problems were in the t/c only. The t/c rebuild co said that all the vanes in the t/c were loose, and not far off coming adrft altogether (as I said above, it had been shuddering for many years). Anyway the vanes were all welded back in place, and the rebuilt t/c was re-filled with Mercon V. Driving the car now, the transformation is amazing. No shudder, smooth changes - like having a brand new car. I only wish I'd had it done 10yrs ago. If you have the same symptoms and plan on keeping the car, I'd thoroughly recommend a good quality rebuild.
 
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And what was the damage $?? If you don’t mind me asking.
I also have (or had, still can’t say for sure) the same problem. Just last week I did a second drain and fill on my 94; but this time I dropped the pan, changed the filter,and refilled with Mercon V and a tube of Lubegard Dr. Tranny. I drove it for about 5 miles and no shudder….so either the Dr. Tranny is doing what it claims or changing the filter helped get better flow/pressure in the transmission. But then again I haven’t driven it since then cause lucky me had to take my truck to dealership for a CEL and now I’m driving a loaner. So….putting miles on the loaner lol.


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Discussion Starter · #24 ·
It cost me £1250 (I'm in the UK) but worth every penny.
 

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Not bad, but I wonder if it’s worth the extra couple hundred to get a replacement transmission instead of this rebuild. Over here in the states we can get them for about $1900 with 6 years (I think) warranty. Has anyone bought one? And are they worth it?


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Discussion Starter · #26 ·
Maybe, unfortunately it's not really an option here.
 

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Update!! Since changing trans filter, draining trans fluid on TC and pan, and adding the Dr Tranny/Lubeguard, I have not had the “shudder” any more.
But!!…
I did notice the transmission would rev up, without accelerating, or what at first seemed to me “downshifting”. I was thinking clutches were going out, or something wrong with torque converter; all I was thinking was $$ . It started doing this once in a while but it kept getting more frequent to the point where on my last drive it did it several times (about 4 or 5) in a 15 mile drive.
So I took it to the shop thinking trans was done! Turns out it was the Range Sensor or MLPS.
Have driven it the past couple of days and no more jumping out of gear.


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