



🛠️ Keep your gears running smooth and leak-free — because your ride deserves the best!
Bardahl 3119 Gear Oil Additive + StopLeak is a powerful 8 oz. formula designed to extend gear oil life, condition seals to stop leaks, reduce gear wear and noise, and improve manual transmission shifting. Compatible with all manual transmissions and differentials using standard automotive gear or motor oils, it’s the ultimate maintenance upgrade for professionals who demand reliability and performance.


| ASIN | B002QET15S |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #759,846 in Automotive ( See Top 100 in Automotive ) #389 in Gear Oils |
| Brand | Bardahl |
| Customer Reviews | 4.4 4.4 out of 5 stars (115) |
| Date First Available | September 2, 2009 |
| Global Trade Identification Number | 00076906031196 |
| Item Weight | 3.2 ounces |
| Item model number | 3119 |
| Manufacturer | Bardahl |
| Manufacturer Part Number | 3119 |
| Model | Gear Oil Additive + StopLeak |
| Product Dimensions | 2 x 2 x 6 inches |
| Size | 8 Ounce |
| UPC | 076906031196 |
| Vehicle Service Type | Car, Truck |
D**S
It worked for me
I bought a used 2007 Chrysler Pacifica that ended up having a read differential leak which turns out not to be serviceable. (You need another diff). As a last resort I bought the differential conditioner / sealer and to my surprise the leak stopped . Have since put 1500 miles on the car and still clean and dry. As a last resort I would definitely recommend.
V**9
Good product
Good product, everything is fine
K**N
Seal conditioner
As described sure hoping it stops or slows down yoke and axle seal seepage.
B**S
Really Works!
Had a small leak in differential seal on my ezgo golf cart. There was always a spot about the size of half dollar under cart after a round of golf. Since they wanted $400 to replace seal because motor had to be removed gave this product a try. Worked great, after two rounds of golf leak is completely gone!
G**S
Three Stars
No noticeable difference,
N**X
Four Stars
Seems to have solved the oil leak problem.
J**N
POOR MS. AMERICAN 3.14159...
At the age of 58 years old, Ms. American 3.14159 (the ONLY 1964 Ford Galaxie 500, Four-Door, Hard-Top Police Interceptor that is found on the WHOLE World Wide Web) had a Transmission Seal begin to leak. Got a Tube of Bardahl Stop Leak, and wonder of wonders, it fixed the old Gal's Transmission. Thanks Bardahl. She needed THAT! JCAllison
K**R
Didn't stop my leak or even slow it down
1990 Silverado 4x4 front transfer case has a slow leak. I have added the product and I will update this review in a couple weeks with the actual results. ok Been 1 full week since additive was added. I SEE NO SLOW DOWN OF LEAK. will update @ 2 weeks, been another week still I see no slowing down of leak. Will update again..ok been 3 weeks since added to transfer case and still have leakage. Lower my rating to 2 stars, JUST HIGH PRICE LUBE....NOW BEEN 3 MONTHS STILL WEEPING, AGAIN JUST REALLY HIGH PRICED 80-90 GEAROIL....
Trustpilot
3 weeks ago
4 days ago