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I wouldn't do it ... Posted by John Fitzgerald [Email] ![]() ![]() ![]() In Reply to: Saab synthetic trans fluid, Tom, Wed, 19 Nov 2003 20:07:22 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Tried this a couple of years ago in my 97 Aero.
Although I switched once to Redline MTL in an '80 99 with great results for many years, and used synthetic MTL in an 86 9000T just fine, when I put it into the 97 Aero, the shifting went from OK to bad news -- 'popping' out of 1st and 2nd on mild shift points, really bad under acceleration. I drained it and spent about a year 'flushing' it with three changes back to conventional 10w-40 Castrol GTX. The trans is now, finally, back to decent shifting -- and my vision of ruining a very expensive trans is starting to fade.
If you really want to help the trans, just leave it alone. Or, perhaps at most, do a 30k - 45k change of conventional oil.
posted by 165.121.13...
_______________________________________ John Burlington, Wisc '73 96 RHD sold after four years in Middle Barton, Oxfordshire, UK '80 99 bought new, sold after 20 years/192,000mi '86 9kT picked up at Trollhatten, sold after 12 years/approx 121,000 mi '87 9kT sold after 9 years/approx 174,000 mi '94 CSE given to my son after 8 years @ 245k; he sold it at 254k mi '95 Aero 146,xxx mi sold '98 CSE 248,xxx mi gave it away '97 Aero 317,xxx mi my daughter’s school car … gave away [we put 300k mi on it] still driving: '97 CSE 170xxx mi 'project car' for myself and my daughters to drive '07 9-3 2.0T 240xxx '08 9-5 191xxx mi my wife's daily driver and a couple of 'non-Saabs': '01 Suburban 201,xxx mi '03 BMW 330 Cic 84,xxx mi '14 Mercedes E350 103,xxx mi
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