LPD47391 Low Pressure Drop 40k Transmission Oil Cooler Kit Compatible with Heavy Duty 40,000 GVW Max with Mounting Hardware

'Chevrolet Silverado 1500 4.8 L with L 4l60e 4 speed transmission'.I purchased this because of the good reviews and price. Yes! I expected the tubing to be too short, yet I did not expect that it is not the correct specifications. So, incl tax, for $26 I bought 8 ft of the correct tubing SAE J 1532. Too from Home Depot got, 4 of 1/4 X 1 inch bolt / nut / lock washer, incl tax, for $2.08. So total additional expense for hardware is $28.08. Later needed just two bolt/nut/washer sets.In my case, reliable report indicates the extra Transmission Oil needed is 1 pint, that includes the hookup tubes, i.e. 1/3 of that just for those the rest is what the cooler capacity, 2/3 rd of a pint. (See below, due to heat expansion of the new parts, in the end I needed 1 and 1/2 pints of fluid to bring a hot 180 F + level to near full level on the hot register of the dipstick.)Installing:Not right away, as the summer season is near over. But I do want to share, and insist against all the misinformation out there, the unit can be installed in any orientation maximizing air flow. So there is no top or bottom, back or front to this. All manufacturers assert the connection can be either top, side or bottom, because the hot fluid is forced down the main feeder through the smaller orifice of the cooling rails, ditto for the out feeder sucking from those because it too has a larger diameter.Will re-edit and report again when the unit is installed.June 22 2023.Today I installed the unit. Couple of gotchas -Mechanic instructed me NOT to put any Fluid in the cooler, or lines, at all when installing. Later check the levels, and IF needed add some! Makes sense because there is altogether 5 Quarts in the system, a pint is just 10% of the capacity.Second on my Truck, following U Tube direction for a similar truck, make sure to locate the cooler tabs on its bottom behind the bottom rail of the truck body framing; so that there is room to replace the bracketing for the grille! You only need 6 bolts and washer sets to do this install. 4 on the top, and two on the bottom. Drilling is required because some of the holes in the brackets do not line up, and cutting to accommodate the hookups if installed to the lower setup, see photo.Passed leak inspection.After the road test; Outdoors today in S Texas at 3.PM in my yard 102 F, slight cooler breeze. Cross town just now, an incline in light traffic, transmission got to 150F, on the way back, down incline 133F. Before the upgrade, those figures would have been 178F, 147F.Topping up the fluid to its prior state; after warming the trans up, had to park and let run a couple of minutes to get to the test range of 180 - 200 F . I needed just under a pint of fluid to get close to where it was before the upgrade, which later turns out to be a wee bit low.But seeing as that is nearly what the capacity of the cooler + lines is NOT a reason to add fluid before doing the correct level check! My mechanic says that sometimes it will not be the same, so wait until after install to check the levels.2nd Update, June 27th, 2023.Rechecked trans fluid levels yesterday, 26th, and found it just over the low mark on my dip stick. It has a hole drilled at both the high and low, making easy reading. I added just 1/16 of a pint of fluid to bring the level to just a hair above the high level hole on the dipstick; IOW @ 190 F, about right. Today on road test on the Interstate, drives great! At the limit, 65 mph, S Texas temp 89 F, the transmission temp 133 - 140s. Coming home again in traffic it went up to 151 F, then back down to 149 F.Overall, very satisfied with the product, and pleasantly surprised with a far smoother shifting of gears; icing on the cake!3rd update, July 6th, 2023.Just to be sure I again checked and found my levels back at just over the bottom hole in the dipstick, so according to my manual that indicates I could put 0.5 L / 1 pint, in to bring the level up to the top hole of the hot range. Instead I chose to put 1/2 pint in. Road tested twice and measured each time I came to the average of well over the lower hole in the dipstick hot range, but a wee bit lower than the top hole.I can only account for the extra fluid needed being due to expansion of both the cooler and the hoses. So of the 1 quart I started with I have just under 1/2 pint left.Again changing gear is buttery smooth! And cross town in traffic never goes over 151F.Very pleased!

Super easy to install works well

I purchased this cooler a couple of years ago, and finally got around to installing it last summer on my to rig. It worked to lower my normal transmission temps by 20-30 degrees F, which I was thrilled with.I've put maybe 2k-3k miles on it since then, as it's not my usual daily driver. I've been driving it for the past couple of weeks, as my daily has been down for repairs, and yesterday when I went to leave work, I noticed a significant pool of transmission fluid under the truck. Upon further review, the cooler has developed a pinhole leak. I'm glad it happened when it did and not while towing on a longer trip, as the transmission would've been destroyed by the loss of fluid.I would not recommend risking your multi-thousand dollar transmission to this trans cooler. It will run cooler, but when it springs a leak and dumps your transmission fluid, and grenades a transmission, you will not remember the $70 price tag as fondly.Even, the cost of the several quarts of fluid that this thing leaked was close to the price of the cooler. Kicking myself for being cheap. It's just not worth it.DON'T BUY!

Dropped my transmission temperature by about 50°f. Must buy for your truck.

I bought this to help cool my 4l60 in my Silverado, ever since installing this I haven’t seen my trans temps go above 160, I recommend running it through the rad as well that way you can help warm up the trans and keep it in a better temp range. Has worked amazingly for me.

I'm very shocked to see no higher then 140°F on my transmission temp gauge id say it's doing good keeping my 4r100 cool !!! Only thing I would suggest is add another 4 brackets to the set to install decently to a 1999-2003 7.3L and it would be excellent!!!!! Oh and actually send the kit with an actual transmission rubber hose not a plain ordinary hose !!! Good thing I ordered 6ft of transmission rubber hose from AutoZone.

Couldn’t be happier, 6.0l 4l65e runs 130’.Take your time get the right tools. don’t cut the ends tubing off, lightly bend the tubes and clamp on the bottom.. (of the cooler. keep the flare to keep the hose from slipping off.Only drawback is the cooling fins seem a little flimsy

03 Silverado 6.0 gas 4l80. Like most of these trucks, when towing the trans temps creep up higher than I’d like. It would sit a little above 210 depending on ambient temperature. On really hot days it would get up to 250/260. I tried some off the shelf trans coolers and didn’t really notice a change. I bought this bad boy and put 2, 7in fans on the front of it and it sat at about 150 degree while moving. It’s a colder day so we’ll see how it acts in summer but Definitely a great improvement! Only thing i didn’t like is that the fins are very easily bent. Just the slightly touch would bend them. Still, 10/10 would recommend