Adding friction modifier to transmission
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Mountain Pass
Joined: Aug 2014
Posts: 109
Likes: 1
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
To clean up, the trans is a 6r80 6 speed.
A very expensive unit to put rear end additive in a very different and expensive design.
The old type 4r70 etc could use (transmission) additive meant expressly for Transmission use and known to work at times.
The replies were meant to relate to the large expense that might result and add to the final outcome.
But that was all taken wrongly.
Not arguing the point but offering the truth about all of it.
I and others would have parked the truck rather than risk further damage regardless of the circumstances.
10r80 are in the $7 to $ 8000 Range and not worth running with any additive to create that kind of possible expense.
Don't tell the shop what you did!.
Good luck.
A very expensive unit to put rear end additive in a very different and expensive design.
The old type 4r70 etc could use (transmission) additive meant expressly for Transmission use and known to work at times.
The replies were meant to relate to the large expense that might result and add to the final outcome.
But that was all taken wrongly.
Not arguing the point but offering the truth about all of it.
I and others would have parked the truck rather than risk further damage regardless of the circumstances.
10r80 are in the $7 to $ 8000 Range and not worth running with any additive to create that kind of possible expense.
Don't tell the shop what you did!.
Good luck.
Hotshot
Joined: Apr 2004
Posts: 13,589
Likes: 2
From: NW burbs of chicago
I've got 195k on my 2015 I started to get shutter. My mechanic suggested dr tranny. Figured why not, and if it doesn't work, I got 192k out of it. I've since put on 3k miles and no shutter.
Logistics Pro
Joined: Mar 2009
Posts: 4,853
Likes: 607
From: Minnesota
Wow, my 2016 started to shutter and I drove it for about 3 months before I had the transmission flushed with BG cleaner and refilled. Never heard of an additive, but did hear the only way to get rid of the shutter was a flush. Been driving it for about 10k miles with no issues at all. I don't like the fact that there is no dip stick on these 6sp transmissions and not a good way to do you own work on them. So far this is the only maintenance that I have had to pay someone else to do.
Tuned
Joined: Jan 2015
Posts: 472
Likes: 153
From: Southeast Wisconsin
https://www.summitracing.com/parts/bmm-22200
Last edited by jake415; Jan 2, 2025 at 08:36 AM. Reason: Add link to part
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