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Old 05-19-2010, 01:02 PM   #1
wamnram
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Default Transmission Failure due to new oil

I was reading the earlier posts on type of oil to use in the transmission based on incompatability with the bronze/brass material. (140wt GL-4/5). Iv'e never really paid attention to the 90-140 wt oil I have used in the past and have never had any problems, then again I don't put on many miles either. Has anyone ever had a failure due to the wrong type of oil in their transmission? (abusing your transmission and blaming the oil doesn't count!)

Just wonderin'

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Old 05-19-2010, 01:08 PM   #2
Cecil/WV
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Default Re: Transmission Failure due to new oil

Nope!
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Old 05-19-2010, 01:15 PM   #3
jdl
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Default Re: Transmission Failure due to new oil

Lots of miles with no problems...
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Old 05-19-2010, 01:40 PM   #4
Bruce Lancaster
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Default Re: Transmission Failure due to new oil

There has been endless discussion about the stuff that attacks brass...I eventually found an article on it. probably from a link here, that sounded pretty authoritative in its source and stated that the problems began at something like 350-400 degrees. I decided to quit worrying about this.
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Old 05-19-2010, 03:09 PM   #5
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Default Re: Transmission Failure due to new oil

Worrying about what?
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Old 05-19-2010, 03:57 PM   #6
Bruce Lancaster
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Default Re: Transmission Failure due to new oil

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Actually, I forget, but I'm going to get on with the necessary worrying about the phase-out of leaded gasoline. Folks, once they finish phasing out the lead, our valves are all going to fail immediately, and by 1980 we won't have any old Ford left!
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Old 05-19-2010, 04:08 PM   #7
Ole Don
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Default Re: Transmission Failure due to new oil

I bought one of the Tremec T3550 five speeds when they came out. I used ATF in it. After a few years, it developed a whine when backing down in second. I called the fellow who sold me the trans, the first thing he asked was what oil was in it. I told him, he said get it out and put in GM Sychromesh oil. I did, no more noise. Magic oil, but at 11 bucks a quart it should be.
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Old 05-19-2010, 04:14 PM   #8
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Default Re: Transmission Failure due to new oil

Also, don't forget to worry about the reduced zinc additive in new oils. It still has a lot more than oil fo the '30's and 40's, maybe even '50's, had, but suddenly it's a problem! Just think about all the flatheads and Model A's, etc. that ran for years with re-refined and/or non-detergent oil! Think that stuff had any zinc additive in it? Nope!
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Old 05-19-2010, 04:30 PM   #9
wamnram
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Default Re: Transmission Failure due to new oil

Thanks yall! I was just wonderin because I have never heard of a tranny failure due to this.
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