Engine/Transmission (1998.5 - 2002) Mobile 1 auto Trannt Fluid

[jbritsch]

Does anyone use Mobile 1 Auto transmission Fluid ? I've used Amsoil .

 

[DLBurns]

Just changed mine out, used Valvoline ATF+3

 

[BTowler]

Stay away from the Mobil 1. I changed mine over and started getting a bad shudder. I am about to change it out again, and I am going with either Amsoil or Valvoline Maxlife. Try a search for "transmission shudder" to find the thread, had someone else respond that had the same results. .

 

[Hohn]

Originally posted by BTowler

Stay away from the Mobil 1. I changed mine over and started getting a bad shudder. I am about to change it out again, and I am going with either Amsoil or Valvoline Maxlife. Try a search for "transmission shudder" to find the thread, had someone else respond that had the same results. .

I would avoid it also. I have two bottles in my garage that won't be used.



I ran it in my Nissan for a while (which requires an ATF similar to ATF +3). It's not designed for newer trannies The only spec it meets is Dexron III. It made the transmission shift hard and seem to hunt. Overall, the trans just didn't like it.



I swapped it out after only 10K miles. I changed over to REDLINE D4. Now THAT is some REALLY good stuff. Smooth as silk.



I've run a total of 70K+ miles on the Redline, and I'm confident that it's what I'm going to use for a long time.



The proof to me is that the transmission now has 113K on it, and it shifts tight as a drum-- no slippage and smooth as silk. It's very responsive.



This product is one of the many Redline products that have given me good results, so if I seem biased, I am-- Redline has earned some loyalty from me.



Justin

 

[jwgary]

I would watch out using anything but the ATF+4. The clutches and everything are designed to use +4 and anything else does not have the same ratings and could cause damage. I did not know that Mobil1 made an ATF+4. I know that AMSOIL has it and have used it in the past. When I did my last fluid change, I would up buying from the dealer (my wife has a discount) because I couldn't find it on the shelf anywhere. Aparently, DC doesn't want just anyone making this stuff.

 

[BTowler]

Originally posted by jwgary

I would watch out using anything but the ATF+4. The clutches and everything are designed to use +4 and anything else does not have the same ratings and could cause damage. I did not know that Mobil1 made an ATF+4. I know that AMSOIL has it and have used it in the past. When I did my last fluid change, I would up buying from the dealer (my wife has a discount) because I couldn't find it on the shelf anywhere. Aparently, DC doesn't want just anyone making this stuff.

DC is the only source for true atf+4, all others that claim to meet the specs have tested the fluids against atf+4 for compatability, they don't actually have the true formula. There is currently a big lawsuit brewing on the horizon over DC's refusal to allow anyone else the formula for atf+4.

 

[robertyoke]

I did not think you needed atf+4 in an 01 truck? I used mobil1 atf in my transfer case on my 98 truck without problems. my first auto is the 03 truck and I have used amsoil universal atf. Amsoil rates it +4 and it is a true synthetic I do not think mobil 1 is or so I have been told. The amsoil stuff seems to be a good product and its less expensive than mobil1. just my $. 02

-robert

 

[BTowler]

Originally posted by robertyoke

I did not think you needed atf+4 in an 01 truck? I used mobil1 atf in my transfer case on my 98 truck without problems. my first auto is the 03 truck and I have used amsoil universal atf. Amsoil rates it +4 and it is a true synthetic I do not think mobil 1 is or so I have been told. The amsoil stuff seems to be a good product and its less expensive than mobil1. just my $. 02

-robert

What I understand to be the case now is DC requires atf+4 in ALL 99 & newer vehicles except certain minivans to meet warranty requirements. It is due to this that they are in violation of Magnusson Moss Warranty act which states they can not require an item for warranty qualification if they are the sole source unless they provide it for free, which is the basis of the actions against DC currently under way.



The Amsoil is a very good product which parallels the specifications for atf+4, but it is not a true atf+4. I would be curious to see what would happen in a warranty situation with the Amsoil. Mobil 1 is not a true synthetic, despite what it says on the bottle. Check the Mobil1 webpage and it states it is a blend. As far as I know, only Red Line, Amsoil & Royal Purple produce true synthetic fluids.

 

[rrowdy]

This +3 & +4 stuff is a real PITA. I went all over my county looking for the stuff with little luck. Finally, a TDR member turned me on to Valvoline Maxlife saying it was rated as a +4 replacement. I called Valvoline and got a hold of an engineer and he said it was rated

as a +4 replacement but they could not put +4 on the bottle as per an agreement with DC. Off to Wallyworld I go and buy a couple cases of the stuff @ $1. 29/Qt and got it changed, turned up the line pressure while I was in the trans and added a Deep sump +4 qt 727 pan. I hooked up the trailer, racecar, fuel, tools etc and head over the Calif desert up steep grades in 100 degree heat and no problems whatsoever. This was over 40K ago and with 124K on the clock the trans is still going strong with temps in lockup around 170-180 degrees. A lot of builders use straight DexIII with no problems either. From My experience I just don't think it's necessary to run + fluids. When I build up a new trans I'll switch to Synthetic, until that time I'll use the cheaper stuff and change it at 25-30K intervals. Just my $. 02

 

[Ed2]

Mobil 1

Hi,

I have used mobil 1 atf in my 99 ram since the first change. I have

over 125000 miles and never had tramission trouble.



I will stay with mobil 1.



Ed

 

[Cooker]

From what I understand the 47re transmission does not need ATF +3 or +4. As far as I know a good number of transmisison rebuilders fill them back up with Dexron.

 

[RobertMiller1]

There are no special "clutch materials" used that require ATF+4.



The basic materials in clutches and bands are fairly standard. The better bands use Kevlar.



The Raybestos is about the best you can use (blue plate specials).



but they are NOT a tuned match with ATF+4.



the issue is balancing just the right amount of slippage to let the locking torque convertor clutches engage without shuddering... .



Too grabby and grandma will complain about the firmness of the engagement... Too slippery, and you build up too much heat, excessive slippage generates friction. Not so good a thing.



I personally like a firm shift. My ony complaint with the Amsoil, is it is very slippery, but a good synth. the shifts with my transgo kit are lightening fast, and smooth. too smooth actually, I'd like a little kick... but most would probably love it. it does run a little cooler on my gauge.