BG products news:
Customer concerns
Discussions on sites like Reddit and YouTube indicate that some customers and technicians have had mixed experiences with BG products and customer service. Some have raised concerns about issues like sludge buildup and poor handling of complaints in certain regions.
Taken from: http://www.flatratetech.com/community/index.php?showtopic=30471
.... "Not to hijack, but what evidence have you seen with BG that it sucks so bad? I've used it for ~2500 passes and ~70K miles changing it every other year and have had no problems. Not questioning what you have found, just curious?
Answer: Weakness of BG products we discovered:
"Sure, no problem! What we run into is many of our customers are running our trannies on the edge of breaking and well beyond the designed limits of the gears. This allows us to see what an oil is doing very quickly. I would assume you haven't seen anything due to the fact that with your vehicle the gears may not be working as hard.
"It has come to the point now that when a customer tells us they are using BG additives, we know the unit is going to be a disaster. Every time we tear a BG treated transmission down, we find the following problems:
1) Severely worn hub thrust surfaces, which we never see with the Redline or Mitsu fluids.
2) Wiped out shift forks. The aluminum wipes off and transfers to the slider.
3) Excessive gear wear. Sometimes it's so bad that the gear would start
fretting.
Note: What is fretting?
[Overview on gear fretting. Fretting corrosion refers to wear marks developed when gears rub against each other due to repeated vibratory micro-motion. The fretting process displaces lubricant, leading to the oxidization and rubbing away of asperities.
Fretting Corrosion - Gear Failure - ONYX Insight
With Redline or Mitsu fluid, we see a nice polished surface.
With products like BG, we see a smeared and wiped out surface and
sometimes it gets so bad that chunks of metal will start to come off the
teeth.
4) Bearings under a lot of pressure, like our intermediate shaft bearings, will start fretting. Fretting occurs from metal-to-metal contact, and the resulting wear particles can become abrasive, accelerating damage and potentially causing other components to fail.
Many other things in the trans will also just be worn out. Usually a BG
trans will cost more than our standard rebuild as it will need so much
more replaced. http://www.jackstran.../pages/bearings
BG product love:
The reason people love BG so much in the DSM world is due to the fact that the stuff is so bad, and creates so much friction in the unit, that it makes worn synchros feel better. The added friction in the unit due to the BG oil will allow the synchro to operate a little better (synchros use friction to synchronize the assembly) but this will also create friction in other places too, which is a very bad thing.
Our tip?
"DO NOT use Synchromesh, BG Synchroshift I or II, or Royal Purple. These fluids will destroy synchros and gears and void your warranty!
What is Clutch Drag and Why Should I Care? When a clutch drags, it is not letting go of the disk fully which overloads the synchros and burns up the friction surfaces quickly. " http://www.jackstransmissions.com/search?q=bg
Weakness of BG products Forum
<a
href="http://www.jackstransmissions.com/pages/thrust-and-slider-wear"
rel="nofollow external">http://www.jackstran...and-slider-wear</a><br/> Page removed.
<br/>
<a href="http://forums.coloradoracing.net/index.php?/topic/128321-bg-products-good-or-bad/" rel="nofollow external">Weaknesses of BG products Forum</a><br/>
Avoiding unwanted friction wear.