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Cooler Runnin’
All summer you’ve dreamed of passing all those boats that have blown by you since June. Now that time has come. You plunk down a large stack of greenbacks for a nasty supercharger and wrench all weekend bolting it in. Now comes the moment of truth. As you tear down the lake, all eyes are on the gauges, and the oil pressure is heading south too quickly. What could be wrong? You let off the throttle for a bit and all the vital signs return to normal.
We’ve ran into this exact scenario before. We installed an R-Tech Supercooler on the ProCharged Dorr’s Marine Engine 502cid motor in our Baja 250ES. The install was a huge success with a whopping 9mph increase in top speed. The boat worked well, but what we weren’t expecting was the huge increase in oil temperature from the gain in horsepower. If we had stayed on the throttle for a good 5,000-plus-rpm run, the oil temperature would have shot for the moon and oil pressure would have dropped to an uncomfortable level, forcing us to back out—what fun is that?

Meet the Best New Product Award Winners – Goodguys Columbus 2025
From suspension breakthroughs to slick bolt-ons and next-gen wiring solutions, this curated collection of fresh hardware gave attendees a first look at what’s about to hit the streets—and the shelves. With awards on the line and plenty of eyeballs walking the floor, companies brought their A-game, packing the display cases with smart engineering, clean design, and purpose-built upgrades. Whether you’re a pro builder or garage warrior, this was the place to get hands-on with the future of hot rodding.

A Long Time Coming
How many times have you heard the following: I sold my first truck for $1,000 and wish I had never gotten rid of it. If you have, then you understand the mental grief generally associated with selling your first truck. What can make matters worse is to find out the new owner wrecked it, sold it or that it was eventually parted out or scraped. Perhaps you have succumbed to one of these unfortunate circumstances, leaving you to long for that first ride. Longtime classic truck enthusiast Eddie Rudd of Knoxville, Tennessee, knows that empty feeling, as Rudd drove a not-so-flashy 66 Chevy 1/2-ton to and from work during his teens, and even into his 20s, it served as his daily driver. Times changed, Rudd became a father and soon learned the uncomfortable truth that the truck no longer allowed the entire family to ride comfortably. Rudd knew the truck had to go, so in March of 1982, he sold it to a friend.
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PRODUCT SPOTLIGHT: SuperMatic 4L75-E Four-Speed Automatic Transmission
In Stock NOW at Gandrud Performance Parts
Author
The Auto Builder Staff
Photos courtesy of Gandrud Performance Parts
This isn’t some warmed-over rebuild. This is a Chevrolet-engineered, factory-remanufactured performance transmission, built with high-output crate engines in mind—including LS-series V8s and traditional small-block Chevy engines. It’s based on the 4L65-E/4L70-E family but leveled up with durability upgrades that let it confidently handle up to 650 lb.-ft. of torque—without breaking a sweat.
Built for Power. Tuned for the Street.
Chevy Performance didn’t just refresh this thing—they gave it a full workout. Inside, you’ll find five-pinion gearsets, a heat-treated stator shaft, and an induction-hardened turbine shaft built to take punishment. An eight-plate 3-4 clutch pack and high-strength input housing help it grab and hold power where lesser transmissions wave the white flag.
Add in a larger 2-4 band, a high-capacity servo, and performance-calibrated valve body, and you’ve got a unit that shifts hard, holds torque, and stays alive even when you’re giving it the beans.
The Gear Ratios You Want
With a first gear at 3.06, second at 1.62, and a highway-friendly 0.70 overdrive, the 4L75-E hits that sweet spot between burnout launches and comfortable cruise RPMs. It’s got the guts of a race-ready trans but with street manners—and it’s compact enough to fit where a 4L80-E just won’t go.
Think REMAN Means Used? Think Again
This REMAN unit from Chevrolet Performance isn’t just refurbished—it’s battle-tested. You get OEM quality, GM-backed durability, and performance upgrades that often surpass brand-new builds. No core return. No guesswork. Just a fully dialed-in transmission ready to bolt in and blast down the road.
Bolt-In Confidence
You’ll need an electronic controller to run this beast—pick one based on whether you’re running fuel injection or a carburetor setup. And if you’re using a Gen V LT engine, you’ll want the appropriate bellhousing kit. Either way, this unit gives you modern control with old-school toughness.
In Stock and Going Fast
These SuperMatic 4L75-E REMAN transmissions are flying off the shelves at Gandrud Performance Parts. If you’re planning an LS swap or tired of watching your old trans cry every time you hit the throttle, now’s the time to upgrade.
👉 Click here to order yours before they’re gone.
Because let’s be real—when you drop the hammer, you want your transmission to say, “Is that all you’ve got?” Not “Please make it stop.”
SuperMatic 4L75-E REMAN At a Glance…
Similar in design to the 4L65E/4L70-E, this 4L75-E electronically controlled four speed overdrive transmission is suitable for “LS” series V8 engines producing up to 650 Ft. Lbs of torque. Does Not include torque converter.
Features:
• Increased horsepower and torque capacity
• Heavy duty upgrades including 5 pinion gearsets
• Heat treated stator shaft splines
• Induction hardened turbine shaft
• Eight-plate 3-4 clutch packs
• Unique, high-strength input housing
• Specific valve body calibration
• Higher-capacity servo
• Larger 2-4 band
• Gear ratios: 1st-3.06, 2nd-1.62, 3rd-1.00, 4th .070





