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Maxlife v dex/merc #5220044 09/22/19 09:24 PM
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HyundaiAbuser Online Content OP
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As stated in a previous thread, I have a 94 Mazda b4000 with a Ford A4LD automatic transmission in it. When I changed the transmission fluid (2 drain and fills) with maxlife the quality in shifting went down enormously. Even started slipping after a couple hundred miles. When I did a cooler line flush with valvoline dex/merc all of the slipping stopped and the transmission started functioning flawlessly. Any ideas of why this is?


03 Hyundai Tiburon:
Castrol Edge 0w40
Redline MT90
94 Mazda B4000
Supertech 5w30 Full Synthetic
Valvoline Dex/Merc
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220055 09/22/19 09:40 PM
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slacktide_bitog Offline
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Were you low on fluid when using the Maxlife? Did you add enough when you refilled? smile

Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220060 09/22/19 09:45 PM
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HyundaiAbuser Online Content OP
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After two subsequent trips around the block (1 per D+F) and at operating temp it was toward the top of the cross thatch.


03 Hyundai Tiburon:
Castrol Edge 0w40
Redline MT90
94 Mazda B4000
Supertech 5w30 Full Synthetic
Valvoline Dex/Merc
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220118 09/22/19 11:45 PM
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Jetsfan421 Offline
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Sounds like your transmission didn't like the maxlife. My old impala didn't like maxlife either. It preferred Castrol Dex/Merc with a full bottle of lubegard red. It shifted like butter when I sold it.

Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220162 09/23/19 05:24 AM
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Char Baby Offline
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Maybe MaxLife has more friction modifier than your tranny likes. I've used MaxLife ATF in many trannies with great success but never in my older THM trannies that require Dexron types.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic 1.8 LX
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220267 09/23/19 08:31 AM
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Snagglefoot Offline
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Here are a couple of photos of the Maxlife bottle. Although they have Dex/Merc on the front they list Mercon LV on the back but not Mercon or Mercon V. I’m wondering if this is not the same as Valvoline Dex/Merc or Castrol Dex/Merc.

44F74235-A118-4485-880B-AC06789F60A6.jpeg3B70A8F6-E94E-4676-9640-80D454BCCBEE.jpeg
Last edited by Snagglefoot; 09/23/19 08:32 AM.

If you want the job done right......do it yourself.
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220337 09/23/19 10:02 AM
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HyundaiAbuser Online Content OP
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I have heard they do not list Mercon or Mercon V due to Fords statements about lack of compatibility. Cant be specced for both V and LV. On their website they list mercon, mercon V, mercon LV and mercon SP.


03 Hyundai Tiburon:
Castrol Edge 0w40
Redline MT90
94 Mazda B4000
Supertech 5w30 Full Synthetic
Valvoline Dex/Merc
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220362 09/23/19 10:50 AM
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Oro_O Offline
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Quote
When I did a cooler line flush with valvoline dex/merc all of the slipping stopped and the transmission started functioning flawlessly. Any ideas of why this is?


Because you used the wrong transmission fluid?

MaxLife is really just a DexVI base fluid with a lot of "suitable for.." on the back label. I have not found an older vehicle (say, pre-2006) it actually works well with.

Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220364 09/23/19 10:52 AM
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HyundaiAbuser Online Content OP
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In that case it is the wrong transmission fluid for everything being that it is not officially licensed for any oem application.


03 Hyundai Tiburon:
Castrol Edge 0w40
Redline MT90
94 Mazda B4000
Supertech 5w30 Full Synthetic
Valvoline Dex/Merc
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220411 09/23/19 12:11 PM
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LeakySeals Offline
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A "compatible with" "multi-vehicle" ATF might get a license if it happens to be identical to a OEM spec. Or maybe it's not the same as any spec. Which could be the case it's very thin. Maybe the thinnest ATF on the market. I am using it in a Dex VI application. Shifts okay but I do have a transmission temperature gauge and it does appear to be warmer. Will know for sure when I replace it all in the spring with OEM Dex VI


06 Escalade 6.0L LQ9 AWD 170k M1 5w30
03 Maxima 3.5L 170k ST HM 10w30
05 Malibu Classic 2.2 111k M1 5w30
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220428 09/23/19 12:25 PM
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JMJNet Offline
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For older car, I think we just need to buy the Supertech ATF which is a Dex 3 equivalent.
I used it in an old Camry and it was fine.
Only less than $14 per gallon.


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220448 09/23/19 12:51 PM
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I have used the Supertech dex/merc and their high mileage dex merc in my b4000 and both worked very well. I recently saw a rollback at Walmart for the hm dex/merc for 3 dollars a quart.


03 Hyundai Tiburon:
Castrol Edge 0w40
Redline MT90
94 Mazda B4000
Supertech 5w30 Full Synthetic
Valvoline Dex/Merc
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5220804 09/23/19 07:32 PM
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barkingspider Offline
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I use dex/merc (non dex vi)in my 04 avalanche and multiple other gm trannys prior to 06 , all of them shifted smooth


04 Avalanche Z71 4x4
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5221090 09/24/19 08:23 AM
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ka9mnx Offline
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You should be using Mercon V...


2005 Ranger 3.0 - SuperTech Syn 5w-30/Motorcraft
2000 4Runner 3.4 - SuperTech Syn 5w-30/Toyota
1997 B2500 Van 3.9 - M1 HM 10w-30/Mopar
1993 F150 4.9 - SuperTech Syn 5w-30/Motorcraft
Re: Maxlife v dex/merc [Re: HyundaiAbuser] #5221194 09/24/19 10:52 AM
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01rangerxl Offline
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I used MaxLife when I did a drain and fill on my 1994 A4LD, but it was just one drain and fill so less fluid changed. I had no shifting issues before or after. No slipping, hesitation, or anything like that. This does make me wonder if using something else would be better than introducing more MaxLife next time though.

MaxLife is a lower viscosity fluid than the regular Dex/Merc, which is why they suggest it for LV and Dex VI. Still, Dex VI is the replacement for Dex III, and Dex III is basically Mercon, so it should work...I guess not in all cases though.

The US product data sheet lists Mercon V and Mercon specifically in the "suitable for" list, but with an "*except in California" note.
https://sharena21.springcm.com/Publ...bd3/3fa3136a-09bd-e711-9c12-ac162d889bd1


2002 Ford Ranger XLT | 3.0 V6 Auto 2WD | 231K miles
1994 Ford Ranger STX | 4.0 V6 Manual 4X4 | 201K miles
1994 Ford Explorer XLT | 4.0 V6 Auto 4X4 | 250K miles
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