Thread Number: 34731
Correction- through ignorance I mis-stated something to John E and all |
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Post# 520770   5/27/2011 at 06:48 (4,689 days old) by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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and I'd like to correct that here. John E and I have been having a running debate on what fluid to use inside the Bendix trannys. This actually affects all of us here. I did some learning this week and found out I was not quite correct so here is the skinny!
John swears by Automatic tranny fluid and I want to say he is correct in that, contrary to what I had been saying! Auto tranny fluid is safe for Bronze and Copper elements. These are what make up the bulk of bearings in vintage transmissions from washers to tractors.
I had always said 90 weight hypoid gear oil is all you should use. I was in error there as there are 5 different grades of gear oil GL1-GL5. You have to check with the manufacturer to see if they are compatible with bronze or "yellow metals". GL1 usually is. And now GL5 is mostly compatible. I use Royal Purple gear oil now as it states its compatible with yellow metals.
BUT John was right in using AutoTranny fluid as well. I was wrong in saying that wasn't good to use.
We all live and learn our hobby. Here is a rebuilt motor filled with Royal Purple and going back into my 1956 Gyromatic for another 54 years of service. Enjoy! |
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Post# 520779 , Reply# 1   5/27/2011 at 08:03 (4,689 days old) by gansky1 (Omaha, The Home of the TV Dinner!)   |   | |
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Post# 520781 , Reply# 2   5/27/2011 at 09:11 (4,689 days old) by Tomturbomatic (Beltsville, MD)   |   | |
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I never changed the tranny fluid in Brenda, my Duomatic, but she was never as loud in the spin portion of the cycle as that machine was in the museum last fall. You would not even be able to use that in a multi-family dwelling. |
Post# 520791 , Reply# 3   5/27/2011 at 11:16 (4,689 days old) by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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Post# 520809 , Reply# 4   5/27/2011 at 12:48 (4,689 days old) by supersuds (Knoxville, Tenn.)   |   | |
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Post# 520867 , Reply# 6   5/27/2011 at 20:13 (4,689 days old) by qsd-dan (West)   |   | |
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Yeah, be sure to use GL-4 oils if there's any possibility of yellow metals involved. I use Redline MT-90 (75w-90w) in manual transmissions that require 80-90 weight oil. It's a synthetic GL-4 oil, but isn't too slippery like most other synthetic gear oils, which can actually cause grinding during shifts. Works wonders, especially during very cold mornings.
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Post# 520975 , Reply# 7   5/28/2011 at 07:43 (4,688 days old) by jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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Post# 521173 , Reply# 8   5/28/2011 at 22:32 (4,688 days old) by qsd-dan (West)   |   | |
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GL-5 is reserved for all synthetic oils and the syn's don't need the EP additives they are so slippery.
Yeah, but most GL-5 oils contain reactive sulfurs, which will eat away at yellow metals ;) From what I've seen, GL-4 oils designed strictly for manual transmission don't have the EP additives. GL-4 oils that claim to be "multi-use" for applications like differentials, among other uses that contain hypoid gears, usually DO have the EP additives. CLICK HERE TO GO TO qsd-dan's LINK |
Post# 521413 , Reply# 9   5/30/2011 at 07:00 (4,686 days old) by jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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Your Rotella gear oil states: Contains a sulfur/phosphorus additive system for excellent load Carrying capacity" on their website. Their website says it has EP additives in it. CLICK HERE TO GO TO jetcone's LINK |
Post# 522690 , Reply# 11   6/5/2011 at 16:07 (4,680 days old) by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)   |   | |
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