XJ6 & XJ12 Series I, II & III 1968-1992

Transmission fluid problem

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Old Feb 10, 2015 | 12:20 PM
  #21  
Doug's Avatar
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Originally Posted by JagCad
Makes sense to me. If a pro shop flushes the trans and it goes bonkers, who gets the blame!!!!. I can hear/read it now. "Incompetent or crooked shop ruined my transmission"!!!


Carl

That's exactly right !


Cheers
DD
 
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Old Feb 10, 2015 | 02:15 PM
  #22  
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Originally Posted by WinstonWolf
Curious, what's the rational for not flushing an old transmission? Too much gunk released? Thanks.
On a transmission that has been flushed every 20,000 miles like I do my 240 Volvo, not a problem but on my 97 Jaguar XJ 6 with 192,000 miles no way. Varnish and gunk that the newer fluid might cut could stop up a valve body. Flushing is 100% new fluid and servicing leaves several qts still in the torque converter. My Jaguar was a gift from my mother when the cadillac dealer offered less than the Michelin tires I put on the car. My father serviced the transmission once that I remember but I can't swear to that. Although the risk may be small, I would never flush a high mileage transmission but that just my take on it.
I had a 1995 XJ 6 that use unreliable and I hated it. Shorter wheel base, different grade of leather, etc. the 97 has been a good car.
 

Last edited by Photoman327; Feb 10, 2015 at 02:24 PM.
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Old Feb 10, 2015 | 07:21 PM
  #23  
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Originally Posted by Doug
Back when I was in the business we had one flush job go "Tango Uniform" on us....out of several hundred performed.
What was the "solved the problem" rate? Just curious as I have "heard" that it is not that effective.

Mind you that is a statistical sample of one dude at the parts counter.
 
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Old Feb 10, 2015 | 08:06 PM
  #24  
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Originally Posted by Bob Kontak
What was the "solved the problem" rate? Just curious as I have "heard" that it is not that effective.

Mind you that is a statistical sample of one dude at the parts counter.

We never sold transmission flushes as a cure for any problem.....nor should anyone else, IMHO.....as problem solving really isn't the intent of a fluid flush. More of a treatment than a cure, if you get what I mean. However, we did sometimes get remarks that the shifting felt better. Hard to judge the objectivity of such feedback, though.

The idea of a flush is simply that it gets out ALL the old fluid.....versus the old school drop-the-pan routine which leave 6-8 quarts of old fluid in the trans.

Cheers
DD
 
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Old Feb 10, 2015 | 09:15 PM
  #25  
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Originally Posted by Bob Kontak
What was the "solved the problem" rate? Just curious as I have "heard" that it is not that effective.

Mind you that is a statistical sample of one dude at the parts counter.
Sometimes it about avoiding a problem not fixing one. I had a transmission flush done on a truck with very long service interval specified by the manufactuer. At the time it was a high mileage vehicle (80-100,000kms a year) after 100k kms I thought bs I'm not waiting that long again for a service.

The trans oils was black, so we flushed, refreshed and then serviced every 50k kms. Just past 400k kms without an issue.

This particular scenario fits what people have been talking about , an approach better suited to new transmissions, but it takes an odd conjunction of events to ever want to do it on a young trans.
 
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Old Feb 17, 2015 | 11:23 PM
  #26  
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Default 2004 Jaguar XJ8 104,000 miles Transmission leak at plug (żdrop trans to fix?)

Hey there forum members.

I was told that since my transmission is leaking at the front plug (I guess where some wires come out) they say it's much more expensive to repair as opposed to simply doing a service and dropping the pan.
1) Is this true?
2) Is there much more work to do with the transmission when the plug leaks?

Also, since I was losing transmission fluid and the trans is not shifting smoothly, I'm wondering what's the best approach to take.
3) Should I do a service and retain as much of the old fluid (this is what the Jaguar dealer says I should do)?
4) Should I replace what comes out?
Or
5) Should I replace all the fluid with the flush finally?
 
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