V8 Bike Riders Forums banner
1 - 20 of 23 Posts

·
Registered
Joined
·
526 Posts
Tough question as I changed to the high stall TQ Converter 2600 rpm and the different stator design so I cannot make a comparitive between the 2.
 

·
Registered
Joined
·
1,435 Posts
Hey Guys

What weight (amsoil) oil did you put in your trany. This is my first change and I want to at least put the right oil in.

Thanks Bill
 

·
Registered
Joined
·
1,435 Posts
I just ordered amsoil for my trany and found there are 2 types ot 10w -40 .

The one is for auto engines and the other for motorcycles. The motorcycle trany type is ( AMF QT 10W-40 ) and that is what I ordered. So the mobil 1 vs amsoil comparison was MX4T vs 0W-40 amsoil. Yet amsoil has a product (AMF QT 10W-40) that is designed for tranys and not used in the comparison. I talked to the guy that did the comparison and the comparison was between the 2 oils . It did not state that the oils were in fact the right ones to use in our aplication. The trany in my boss is a modified car trany or is it a motorcycle trany. If it is a bike trany why are we using MX4T that is recomended for a common engine/trany system on the mobil web site and if it is a car trany why is the oil not trany fluid specific.
Am I ordering the wrong oil or what.

Bill
 

·
Registered
Joined
·
3,598 Posts
Bill...it is my understanding that the reason for the Mobil 1 MX4T is that it has fewer friction modifiers than straight Mobil 1 10W/40W so that the clutches don't slip. That is why it is used in Jap bikes that share common engine and tranny oil. It was actually someone on line ( I believe the Zeises) who first tried the Mobil synthetic and did so because the properties of the Mobil 1 were similar to that of the original John Deer stuff but they found it to shift more positively and everyone began to use it including Nesco as the factory fill. Frankly, I noticed NO difference at all from the Deere fluid but I like the fact that synthetics just don't break down.
If you're still in the warranty period I certainly wouldn't think of using it because you will be told you used a non-recommended fluid if the tranny fails.
Personally, this is something with which I don't want to experiment. It's possible that the Amsoil is great or even better than the Mobil but also possible that it is so slippery that the clutches in the tranny won't hook up as well...I just don't know and I don't think anyone here really does.
One thing I just can't believe is that the Amsoil produces cooler trans temps because the heat is generated by the converter shearing and tubulence between the stator and rotor of the converter.
Play if you like but this Boss owner will stay with the recommended fluid until Nesco says otherwise....Joe
 

·
Registered
Joined
·
4,836 Posts
Bill,

As Joe said, the trans requires the use of lubricant with reduced friction modifiers. The MX4T is used in bikes with common crankcase/clutch (wet)/transmission sumps.

Your trans in a 2 wheeler is NOT a modified auto transmission, but a specifically designed transmission for the Boss. Do not use ATF......

There has been a lot of talk about the Amzoil, but I myself would not go with it unless NESCO blessed it. A call to Jim @ NESCO might answer your questions. The MX4T is 10W-40.

I just changed mine after 4000 miles on the #7 converter and found it was almost clean enough to reuse (I didn't) and no appreciable amount of debris in the filter or on the pan. I gotta believe the fluid is the right one for the tranny, 'cause I'm not particularily easy on mine.

Tim
 

·
Registered
Joined
·
526 Posts
GRUMPY said:
Bill,

As Joe said, the trans requires the use of lubricant with reduced friction modifiers. The MX4T is used in bikes with common crankcase/clutch (wet)/transmission sumps.

Your trans in a 2 wheeler is NOT a modified auto transmission, but a specifically designed transmission for the Boss. Do not use ATF......

There has been a lot of talk about the Amzoil, but I myself would not go with it unless NESCO blessed it. A call to Jim @ NESCO might answer your questions. The MX4T is 10W-40.

I just changed mine after 4000 miles on the #7 converter and found it was almost clean enough to reuse (I didn't) and no appreciable amount of debris in the filter or on the pan. I gotta believe the fluid is the right one for the tranny, 'cause I'm not particularily easy on mine.

Tim

FWIW---When I was having all of my tranny mods done Jim and I discussed this in detail we even discussed why--it has just a few points better viscosity at temperature than the Mobil 1 fluid. Either will work but mine uses the Amzoil and I know TBH is using it as well. I agreed not to repeat my entire conversations with Jim but why would I do something to my tranny not approved by the manufacturer?
 

·
Registered
Joined
·
3,598 Posts
Tim...I've had the same experience with fluid changes using the Mobil MX4T with very little debris in the oil or in the filter for that matter. As we say in the operating room, "Better is the enemy of good" I think the Mobil is a good fluid and won't try to better it unless I an convinced the Amsoil offers some advantage and no down side......Joe
 

·
Registered
Joined
·
1,435 Posts
My problem here is getting either type of oil Mobil 1 or Amsoil. Even though both oils are available I cant get the specific mx4t or (so far whatever amsoil product I need) without ordering from another province or country. There has to be an easier way to do this.
Bill
 

·
Registered
Joined
·
1,429 Posts
I have to agree with Tim and Joe on this issue ... The transmission (IMO) is the weak link on the Boss - been there done it with a rebuild once already. I never abused the tranny in 2nd gear and a sedom use reverse. I do however beat it in 1st gear pretty good. I will stick with the tranny manf recomendation and use MX4T I also spoke with Jim (Nesco) during my rebuild and he stated more then once that the MX4T was the best product to use ... This was over a year ago, maybe he has a different opinion now - don't know. I do know until I hear different either from Nesco or Boss Hoss I will be using Mobil 1 in my bike.
 

·
Registered
Joined
·
4,836 Posts
Bill,

Some of the "big box" discount stores, i.e. Target, Walmart, etc. sometimes carry MX4T. It is such a common oil used in dirt bikes, etc.

How about your local auto parts distributor??

Tim
 

·
Registered
Joined
·
8,619 Posts
I've found that AUTO ZONE stores carry MX4T.

Jack
 

·
Registered
Joined
·
3,598 Posts
I think it's like how many angels can dance on the head of a pin. Frankly, it's fun to talk about but this seems like a non-issue to me. Amsoil's comparison chart didn't compare their synthetic with the Mobil synthetic and even if it did we all know that all manufacturers of any product put their own spin on these things so who knows?
Bet my cookies that there is no meaningful difference between the two. The Nesco tranny has many more issues than whether Mobil or Amsoil synthetic is used!
We don't beat ourselves to death about what fluid to use in our car trannies because they are inherently built to last with any brand fluid.
Reminds me of the engine oil debate about synthetic vs mineral based oils for the motor. With regular oil changes is there any demonstrable difference in engine life? I've never seen any objective evidence that one actually has any REAL advantage over the other....Joe
 
1 - 20 of 23 Posts
Top