Flush with Syn or drain and fill with OE

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22
Location
Lexington, KY
07 335 auto with 70k miles still on FF transmission fluid. Bought used at 65k miles. Should I drain and add with BMW spec fluid or flush with Redline ATF...and if ATF which version?
 
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17,269
Location
Upper Midwest
What fluid does the manual specify for that BMW?
Originally Posted By: srbarnes4ever
07 335 auto with 70k miles still on FF transmission fluid. Bought used at 65k miles. Should I drain and add with BMW spec fluid or flush with Redline ATF...and if ATF which version?
 
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2,380
Location
Paradise of Florida
Redline D6 or Amsoil ATL/OTL... are a couple. Most lv full synth universal multivehicle ATFs will work too. Post the required BMW spec or pn for more choices. At this mileage, a full change should be considered. Another option would be 2-4 drain/refills.
 
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23,898
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CA
Fluid change is not required until 100k - leave it alone. When it comes time to do it, let the dealer or a Euro specialist handle it. You're better off having it done by someone who has performed this service before.
 
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8,598
Location
Florida
First you should know what the OEM fluid is. Certain cars were filled at the factory with synthetic ATF. Sometimes you don't need to go to the dealer to get OEM fluid, as some European car companies will simply take a Pentosin fluid, write their name on it, and multiply the price 3 or 4 times.
 

srbarnes4ever

Thread starter
Messages
22
Location
Lexington, KY
Originally Posted By: kschachn
All these recommendations, and the OP hasn't reappeared nor posted what the spec is. I love threads like this smirk
Lol, the OP had a birthday weekend so has been out of touch so be nice! wink I need to dig up the spec but I know it is Pentosin based and I found a ZF article that recommended 60k change intervals. BMW claimed lifetime recently even though the OE apparently recommends otherwise.
 

srbarnes4ever

Thread starter
Messages
22
Location
Lexington, KY
Originally Posted By: The Critic
Fluid change is not required until 100k - leave it alone. When it comes time to do it, let the dealer or a Euro specialist handle it. You're better off having it done by someone who has performed this service before.
This link suggests the 100k change interval is risky....thoughts? BMW auto transmission change interval
 
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17,269
Location
Upper Midwest
Yeah, sorry. It's just that without knowing what the book specifies everyone is shooting in the dark. I also agree you need the book if you are going to change it. Follow whatever they say to the letter.
Originally Posted By: srbarnes4ever
Originally Posted By: kschachn
All these recommendations, and the OP hasn't reappeared nor posted what the spec is. I love threads like this smirk
Lol, the OP had a birthday weekend so has been out of touch so be nice! wink I need to dig up the spec but I know it is Pentosin based and I found a ZF article that recommended 60k change intervals. BMW claimed lifetime recently even though the OE apparently recommends otherwise.
 

srbarnes4ever

Thread starter
Messages
22
Location
Lexington, KY
Originally Posted By: kschachn
What fluid does the manual specify for that BMW?
Originally Posted By: srbarnes4ever
07 335 auto with 70k miles still on FF transmission fluid. Bought used at 65k miles. Should I drain and add with BMW spec fluid or flush with Redline ATF...and if ATF which version?
ZF Lifeguard 6 or Shell M-1375.4 is the spec'd fluid.
 
Last edited:

srbarnes4ever

Thread starter
Messages
22
Location
Lexington, KY
Originally Posted By: kschachn
Yeah, sorry. It's just that without knowing what the book specifies everyone is shooting in the dark. I also agree you need the book if you are going to change it. Follow whatever they say to the letter.
Originally Posted By: srbarnes4ever
Originally Posted By: kschachn
All these recommendations, and the OP hasn't reappeared nor posted what the spec is. I love threads like this smirk
Lol, the OP had a birthday weekend so has been out of touch so be nice! wink I need to dig up the spec but I know it is Pentosin based and I found a ZF article that recommended 60k change intervals. BMW claimed lifetime recently even though the OE apparently recommends otherwise.
By follow the book, are you saying follow BMW or follow ZF's recommendation? I am looking to extend the life as much as possible with Cobb soon to be added to the equation so presumably more heat/wear on the transmission. I am using 7500 - 10k OCIs vs BMW recommended 15k for similar reasons. I am not familiar with ZF ATF so my debate is just do a drain and fill with roughly 5 quarts of ZF vs full flush and fill with ZF or Redline ATF. I am assuming mixing the 2 is not desired but perhaps you all have other thoughts there also.
 
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12,925
Location
Northern Kentucky
Get the fluid from your BMW dealer, I would drain and fill it now and then again in 1k miles. 100k is too long for any transmission fluid especially the FF which will be holding all the break in metals and contamination.
 

srbarnes4ever

Thread starter
Messages
22
Location
Lexington, KY
Originally Posted By: srbarnes4ever
Originally Posted By: 901Memphis
Also not sure if you have a drain plug but if you don't look at getting a good size mity vac.
What is a mity vac?
Just answered my own question!
 
Messages
17,269
Location
Upper Midwest
Sorry, I meant mechanically - follow the BMW recommendation for how you replace the fluid and check the level. Maybe it is easy, maybe not so much. On my old BMW it is the typical BMW method of overfiling and letting it run out until a certain temperature is reached (with the car level). Not a huge job but still you want to do it right. And I have a friend with several BMWs and his use Lifeguard 6 as well. Kinda pricey eh?
Originally Posted By: srbarnes4ever
By follow the book, are you saying follow BMW or follow ZF's recommendation? I am looking to extend the life as much as possible with Cobb soon to be added to the equation so presumably more heat/wear on the transmission. I am using 7500 - 10k OCIs vs BMW recommended 15k for similar reasons. I am not familiar with ZF ATF so my debate is just do a drain and fill with roughly 5 quarts of ZF vs full flush and fill with ZF or Redline ATF. I am assuming mixing the 2 is not desired but perhaps you all have other thoughts there also.
 
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