Has anyone used Amsoil synthetic Transmission lube 75W-90 GL-4 in their 1969 4 speed?

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Rocket

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Just wondering if any of you have used Amsoil synthetic Transmission lube 75W-90 GL-4 in their 1969 or earlier 4 speed. I will be rebuilding the transmission and was hoping to use this oil. It will be rebuild to stock specifications with new stop rings, bearings and seals.

Thanks
 
Yes, I have been using it for quite some time. My trans is a smooth-shifting pleasure. I also use nothing but their 20W-50 Severe Service Racing oil in my 383. The first thing I noticed there was that the engine turns over faster when cold. I guess their claims of reduced friction are valid.
 
Thanks for your comments. I also see another post from a couple of weeks ago about hard shifting that gives other comments as well. I missed this one before I put up this post.
 
The other thing you want to do if you are rebuilding your trans is send your shifter to Hurst for a complete rebuild. I sent mine while I was rebuilding my trans. Big difference.
 
I did the same. Just got it back from Brewers. Nice new woodgrain shifter ball also.
 
I have used AMSOIL and will never use it again because this produce took out my trans and the AMSOIL company would not stand behind their product. They spend more money testing and retesting their oil sample that was drained from my 4-speed with less then 500 miles on the rebuild that they could have rebuilt it the trans two times. They also conveniently lose the particles and filter that I shipped to them and then said they could not find any trace of metals in the oil sample that was shipped in the same box as the particles and filter. Companies like this should be put out of business.
 
FYI, ATF is the recommened oil for a Mopar 4 speed trans. The manual does say that gear oil can be used in hot climates but ATF is the first recommened oil.


Chuck
 
I have used AMSOIL and will never use it again because this produce took out my trans and the AMSOIL company would not stand behind their product. They spend more money testing and retesting their oil sample that was drained from my 4-speed with less then 500 miles on the rebuild that they could have rebuilt it the trans two times. They also conveniently lose the particles and filter that I shipped to them and then said they could not find any trace of metals in the oil sample that was shipped in the same box as the particles and filter. Companies like this should be put out of business.


You have a filter on your 4spd?
 
No filter on a 4-speed. I used a painters filter to fliter out the large particle so that I could show Amsoil a photo of the damage...
 
FYI, ATF is the recommened oil for a Mopar 4 speed trans. The manual does say that gear oil can be used in hot climates but ATF is the first recommened oil.

Chuck
Chuck,
I have heard of some guys using ATF in the winter up north but never in warm weather. The manual calls for SAE 140, but states that this can be replaced by SAE 90, SAE 80, or ATF "if shift effort becomes extremely high" in cold weather but that this should be "replaced by SAE 140 in warm weather" I have always used 75W-90 in mine. SAE 140 is actually the first recommended lube in the manual.
 
It is highly unlikely the gear oil had any direct bearing (no pun intended!) on this particular failure, especially considering the 500mi. interval mentioned. Lube-related failures are more long-term issues, generally speaking.

However, I believe a couple of points WRT the subject of Amsoil's so-called "warranty" deserve a look. 1) Does anyone know of or ever heard of Amsoil paying out a warranty claim? Of course not. They never did and they never will. 2) Their so-called "warranty" is a major element of the marketing machine and not worth the paper it is printed on. It cannot be substantiated in any court of law, based on the verbiage alone. It is for all practical purposes, just a cog in the Amsoil hype machine.

Thought I'd just mention those two little observations of mine. JMHO, I'm not a lawyer.
 
My owners manual in my '72 Duster lists ATF. It gets to triple digits in the summer here and run the ATF. However, running gear oil or motor oil in an 833 won't hurt it at all and my intention was not to talk people into dumping their gear oil and running ATF instead. I was just pointing out that ATF per the owners manual is the recommended lube.

Chuck
 
I agree with Ace 100% that warranties are just a marketing tool and nothing more. If any product was really of high quality it would not need a warranty.


Chuck
 
I have used AMSOIL and will never use it again because this produce took out my trans and the AMSOIL company would not stand behind their product. They spend more money testing and retesting their oil sample that was drained from my 4-speed with less then 500 miles on the rebuild that they could have rebuilt it the trans two times. They also conveniently lose the particles and filter that I shipped to them and then said they could not find any trace of metals in the oil sample that was shipped in the same box as the particles and filter. Companies like this should be put out of business.
I responded to your last post about this. What makes you think the lube was the culprit? You always hear about failures from bad lubes and every time it ends up being metal fatigue in a part or parts, improper assembly, or something else. Lube-related failures seem to be an urban legend other than the seemingly increasing cam failures do to low-zinc oils. If there was an actual problem with a batch of lube it would not be just one person who had problems, it would be hundreds, if not thousands of customers. Before I switched to Amsoil I spent tons of time checking them out and I found tons of positive reviews of their stuff and not one complaint. That is why I switched, not because of anything Amsoil had to say. Obviously, I do not know your situation but it seems to me that if they put out a bad batch of product, contaminated or whatever, you would see complaints all over the place. Yours is the only one I have ever seen. I don't mean to challenge you, it just doesn't make sense. If any company did put out lubes that trashed engines or trannys they would be put out of business because the word would get out and no one would buy their stuff. It just seems that when you have thousands of people buying and using the same product and only one of them has a problem the probability that their problem was caused by the product is just about zero.
 
personally I like amsoil iv never had a problem with it (dosent mean that everyone likes it) I wouldent wast the money putting it in my trans tho I use kendal sae 50 works good year round. I dont know why evryone is so bent over amsoil warranty they make their oil for race use and fleet use I dont know of a company that will warranty something used for eather. for example mopar performance parts (any mopar part beginning with P) are not coverd by any warranty of any kind, heck they are not evin returnable if not used & still in the package. As for the consumer line http://www.performancemotoroil.com/Warranties_and_the_Magnuson.html
 
My owners manual in my '72 Duster lists ATF. It gets to triple digits in the summer here and run the ATF. However, running gear oil or motor oil in an 833 won't hurt it at all and my intention was not to talk people into dumping their gear oil and running ATF instead. I was just pointing out that ATF per the owners manual is the recommended lube.

Chuck
Ah. I was looking in my '69 Plymouth service manual.
 
personally I like amsoil iv never had a problem with it (dosent mean that everyone likes it) I wouldent wast the money putting it in my trans tho I use kendal sae 50 works good year round. I dont know why evryone is so bent over amsoil warranty they make their oil for race use and fleet use I dont know of a company that will warranty something used for eather. for example mopar performance parts (any mopar part beginning with P) are not coverd by any warranty of any kind, heck they are not evin returnable if not used & still in the package. As for the consumer line http://www.performancemotoroil.com/Warranties_and_the_Magnuson.html
You have to excuse Ace. He HATES Amsoil for some unknown reason. To be fair I have never heard of them paying a claim but I have also never heard of anyone trying to make a claim except on this thread.
 
I agree with Ace 100% that warranties are just a marketing tool and nothing more. If any product was really of high quality it would not need a warranty.


Chuck
Very true. Also, how many average customers have the ability to prove that the product was faulty?
 
First of all, I am not just assuming the failure of this 4-speed manual transmission was from the AMSOIL lubrication. I am saying this lubrication 100% caused the failure… This transmission was professional rebuilt to factory spec’s (With All New Parts) and had less then 1000 miles on the rebuild when a AMSOIL distributor at a local car show convinced me there was advantages of using AMSOIL and sold me this product. After the damage was done AMSOIL was not willing to stand behind their product! As I wrote before, rather then AMSOIL doing the right thing and repairing this transmission, AMSOIL spent more then twice the funds on testing of the oil sample to make themselves out to not be at fault.

I received the following comments from an AMSOIL supplier (I tell all of my customers that if there is a problem, I want to know about it immediately, because I'm there to help resolve any issues.) My reply to this person was if there has never been and issues with the AMSOIL products why would the suppler write this? (No Reply...)
 
First of all, I am not just assuming the failure of this 4-speed manual transmission was from the AMSOIL lubrication. I am saying this lubrication 100% caused the failure… This transmission was professional rebuilt to factory spec’s (With All New Parts) and had less then 1000 miles on the rebuild when a AMSOIL distributor at a local car show convinced me there was advantages of using AMSOIL and sold me this product. After the damage was done AMSOIL was not willing to stand behind their product! As I wrote before, rather then AMSOIL doing the right thing and repairing this transmission, AMSOIL spent more then twice the funds on testing of the oil sample to make themselves out to not be at fault.

I received the following comments from an AMSOIL supplier (I tell all of my customers that if there is a problem, I want to know about it immediately, because I'm there to help resolve any issues.) My reply to this person was if there has never been and issues with the AMSOIL products why would the suppler write this? (No Reply...)
You still say it caused the problem but you don't say why you think that and what the proof was. Brand new rebuilds grenading is nothing new. If the fact that it was a "professional rebuilt to factory spec’s (With All New Parts)" is your main reason for blaming the lube you had no case at all. In fact, as Ace said, having it go so soon after the rebuild makes it even less likely that it was the lube that caused it. When I rebuild something, the first 1000 miles or so is when I am nervous about it flying apart for some reason. If you get that far the parts were good and so was the work. Parts can be bad, even professional mechanics screw up once in a while as well. It is just extremely unlikely (if not impossible) that a bad product (from any manufacturer) would cause a problem for only one customer and not hundreds or even thousands. Lubes are made in huge batches, not a couple quarts at a time. It is FAR more likely that your mechanic screwed up and blamed the lube or maybe you got a bad part. It happened to me. The clutch disc in my almost brand new '87 GLHS flew apart because of metal fatigue. Also, I bought a Mopar Performance 3.87 gearset for the same car that had the bearing journals on the intermediate shaft cut several thousanths to small. If that was not noticed and we had put it together it would not have been long before I needed a broom and mop. And a new transaxle.

Maybe they did not "stand behind their product" or do what you thought was the "right thing" because they knew the lube wasn't the problem and they also knew that if they paid such a claim (that seems insignificant to you) they would open themselves to a possible situation where anyone who heard about the case who broke an engine or transmission would try to get them to pay for it whether they used their products or not and even if they never had to pay a claim the defenses could cost them cubic dollars.
 
Why Are You Attacking A Fellow Mopar A-Body Bother???
 
The way I look at it is the oil and the trans are man made. So who knows what really happened.
 
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