Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Dave f

Synthetic vs standard automatic transmission fluid

Recommended Posts

Posted (edited)

Does synthetic fluid last longer/result in less wear extending life of a 47re auto Trans with oversize cooler and valve body/tc upgrades. What brand is good

Edited by Dave f
Omission

Share this post


Link to post
Share on other sites

Thank you, I didn't know that I have mine changed where I had the Trans rebuilt 

Share this post


Link to post
Share on other sites
24 minutes ago, Evan said:

It's got friction modifiers because it's very slippery synthetic. 

Actually no standard synthetic is not slick enough and causes chattering og the clutches and bands. The friction modifier stops the chattering by making it slicker. Ask @Dynamic...

  • Like 1

Share this post


Link to post
Share on other sites

I think ya'll  are. Just saying it 2 different ways. Seems that way to me anyway.

Share this post


Link to post
Share on other sites
11 hours ago, Mopar1973Man said:

Synthetic alone is not slick enough. So friction modifer is added to allow clutches ans band some ability to slip without chatter. Again ask @Dynamic about this, this is how it was explain to me.

 

Exactly what Tony Garcin (Dunrite) told me years ago.  That was Ma Mopars answer to the lockup chatter at one point.  Would have been nicer if they had fixed it right.

Share this post


Link to post
Share on other sites
Posted (edited)

I have the @Dynamic stage 3 build 47re. He put fluid in it with the same specs as OE fluid, it already comes with the friction modifiers added to it. He told me to change it (can't remember how many miles after it was built) and I did, adjusted the bands and changed the filter and added the exact same fluid he used. 

 

 I asked him about synthetic and he told me the stuff he put in there is just fine. I've put nearly 50,000 miles on it since it was built and I change the fluid religiously every 10K miles. Basically every other oil change. Might seem like overkill but I've never had an issue and for the money I spent on the build, I feel like a couple hundred bucks on fluid and a filter and some wrench time is good insurance. Plus, in 20 years from now, it'll be pretty cool to have a truck that's in just as good repair as what it is now. 

 

IMHO.....a deeper pan with added fluid capacity is more than enough to make up for whatever added benefits someone might obtain from running synthetic. More fluid= more heat dispersion= less heat= longer tranny life. 

 

That was long winded... LoL! 

 

Edited by crf450ish

Share this post


Link to post
Share on other sites
2 hours ago, crf450ish said:

I have the @Dynamic stage 3 build 47re. He put fluid in it with the same specs as OE fluid, it already comes with the friction modifiers added to it. He told me to change it (can't remember how many miles after it was built) and I did, adjusted the bands and changed the filter and added the exact same fluid he used. 

 

I used Dex 3 with a bottle of Lubegard "Black". It's the fluid I've always preferred in the older transmissions.

 

ATF+4 has a TON of friction modifier in it to deal with converter clutch chatter. This affects shift feel quite a bit. If you build it right, and use the right converter, there won't be any slippage to cause chatter.

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites

^^^
That is what my transmission builder said he puts in his rebuilds too, he said it wasn’t *snake oil*. Lol!    

2EB43D1E-123F-4AC5-8F91-05D07CD822E6.jpeg

I changed the oil after about 10 months to instal a plus 4 ATS deep pan and a derale cooler. drained 6 quarts out of factory pan, it took 12 to fill it back up 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...