






❄️ Stay cool, tow hard, and never miss a beat!
The SINTLY LPD47391 is a premium low pressure drop 40k transmission oil cooler engineered for heavy-duty vehicles up to 40,000 GVW. Featuring a robust brazed aluminum build, it delivers superior cooling efficiency to maintain transmission temperatures below 160°F during demanding towing and driving conditions. Its compact design and included mounting hardware ensure straightforward installation across cars, vans, light trucks, and RVs, backed by responsive customer service for peace of mind.



| ASIN | B09WHLTV2Q |
| Best Sellers Rank | #11,700 in Automotive ( See Top 100 in Automotive ) #7 in Towing Hitch Engine Oil Coolers & Kits |
| Brand | SINTLY |
| Customer Reviews | 4.1 4.1 out of 5 stars (405) |
| Date First Available | March 25, 2022 |
| Item Weight | 5.74 pounds |
| Item model number | LPD47391-Black |
| Manufacturer | SINTLY |
| Manufacturer Part Number | LPD47391-Black |
| Model | LPD47391 40k Transmission Oil Cooler |
| Product Dimensions | 25.4 x 10.4 x 2.64 inches |
M**N
Works great, trans stays under 160*
Works great so far, it is large and may not fit smaller vehicles but was easy to install on my 03 Chevy avalanche and keeps the transmission under 160* even when towing. I did bypass the radiator built in heat exchanger as I live in the south and do not need a trans heater.
L**E
Great quality
Has preformed spectacular on my truck. It's a mildly build 5.3 with an extremely built 4l60E it keeps temp noticeably lower and holds pretty consistently when I abuse the truck will purchase for any project
L**I
Came in clutch
Installed on my 2016 Silverado prior to an 850 mile trip while hauling my C10 just for piece of mind. Halfway through the trip my stock trans cooler cracked as we pulled into the hotel, leaking trans fluid everywhere. I just Re-routed the lines to bypass the stock cooler and use this as the primary. Worked great going through the mountains in 100° weather, this along with the trans TBV kept the temps around 130-140°. 5 months now and no issues whatsoever. For a fraction of the cost that the mishimoto goes for, this does the same job imo. The ONLY thing I needed was additional hose to route it how I wanted. $14 for an additional 5ft of hose at NAPA.
E**N
Cracked after 1 year leaked all my fluid out
Bought this in October of 2024 for my 2014 silverado 1500 5.3L because they're known for over heating transmissions. So I got this, installed it and it worked great for a full year and then it randomly cracked and all of my transmission fluid leaked out while I was driving and threw my transmission out. Obviously driving at night there is no way to know it was leaking until my truck would no longer move. Didn't know this cooler has a one year expiration date. There was no reason for this cooler to randomly crack after a year and leak all the fluid out.
G**S
Satisfied
Just what my son wanted and needed!
R**Y
Nice trans cooler
Mounted this on my 91 gmc very east to install. Has kept my trans fluid from overheating. Hight recommend it for anyone not trying to spend alot on a high end cooler.
K**N
Trans cooler
So far so good install was straight froward and it’s does what it’s supposed to as of now, cool temps, good size, overall good bang for your buck. If anything happens I’ll follow up. Forgot to mention I didn’t use the hose the kit came with I bought my own but still good after 2 months of use
J**O
2010 Chevy Silverado 1500
Easy assembly looks and runs great. Great value keeps transmission cool on my 2010 Chevy Silverado
G**I
ممتاز ورائع
S**.
Let's Just say tru-cool is overpriced
و**ف
منتج تالف
A**D
Cooler start to leak after 8 months ... cheap quality.
A**D
This cooler stops working after 10 days only
Trustpilot
1 month ago
1 month ago