Finding the right transmission fluid for a 700r4 can feel a bit like a guessing game in the event that you're looking with older manuals in comparison to what's upon the shelves nowadays. Back when these types of four-speed automatics were standard in each Chevy truck and Camaro on the highway, the particular "correct" fluid has been Dexron II. Certainly, you can't specifically walk into a local auto parts store and find a fresh bottle of Dexron II anymore. Things have changed, but the good news is that the 700r4 is a pretty resilient part of machinery as long as you retain it cool and clean.
The Progression of Dexron
If you appear at the dipstick on a share 700r4, it'll probably tell you in order to use Dexron II. Since that's out there of production, nearly all guys gravitate toward Dexron III/Mercon. For a long time, this was the sector standard for old GM transmissions. It's a mineral-based fluid that matches the friction characteristics the 700r4 was originally designed for. It works great, it's affordable, and it's easy to discover.
However, points got a small more complicated when Dexron VI strike the scene. Common Motors says Dexron VI is "backwards compatible" with anything that used Dexron III. In theory, that will means you are able to get rid of it into your 700r4 without a 2nd thought. It's a thinner, synthetic-blend or full-synthetic fluid developed for better gas economy and more life in contemporary six-speed transmissions.
Some old-school builders get a little nervous regarding putting the slimmer Dex VI in to a 30-year-old transmission. The concern is definitely usually about seal swell and inner pressures. If your own 700r4 is original—meaning it's never been rebuilt—those old seals might prefer the particular slightly thicker viscosity of a top quality Dexron III. If it's a new rebuild with contemporary seals, Dexron VI is usually a solid upgrade because it handles heat much better than the old stuff.
Synthetic versus. Conventional Fluid
This is the classic garage area debate. Do a person stick with the fundamental "dino" oil or go for the particular fancy synthetic stuff? For a 700r4, the answer usually depends on how you're utilizing the vehicle. If you've got a weekend cruiser that will just goes to car shows plus back, basic regular Dexron III can do the job just fine. You aren't pushing the temperature ranges high enough to worry about fluid breakdown.
However, if you're dragging a boat with an old Suburban or even you've got a built 350 small block pushing 400 horsepower through that will 700r4, synthetic fluid is definitely a lifesaver. The biggest killer of these transmissions is high temperature. Synthetic fluids don't "cook" as easily as conventional types do. When standard fluid gets too hot, it begins to oxidize and turn into a varnish-like gunk that clogs up your valve body. Synthetic remains stable at significantly higher temperatures, which can be the difference between traveling home and phoning a tow pickup truck.
How Much Fluid Do You Require?
One of the most typical questions is just how much transmission fluid for a 700r4 you actually have to buy. It's a bit of a trick question due to the fact it depends upon exactly what you're doing.
If you're just doing a standard pan drop plus filter change , you'll usually need between 4 and 6 quarts. You're only draining what's in the skillet, not what's tucked away in the rpm converter or the particular cooling lines.
If you've just installed a brand-new transmission plus a fresh torque converter, you're searching at an overall capacity of roughly 10 to 12 quarts. Always begin with about 8 or even 9, start the engine, let this warm-up, and then check the dipstick while the motor is running in park. It's a lot simpler to include a quart as opposed to the way it is to drain one since you overfilled it.
Why Warmth Is Your Worst Enemy
We can't stress this particular enough: the 700r4 hates heat. The fluid isn't simply there to lubricate; it's there to move heat away from the clutches plus into the cooler. In the event that your fluid is usually old, burnt, or low-quality, it halts doing that job effectively.
When you're pulling the particular pan to improve the particular fluid, take a look at the bottom of the particular pan. A small bit of fine grey "clutch dust" is normal—that's just damage. But in case you see portions of metal or if the fluid has the aroma of a burned up marshmallow, you've obtained bigger problems than just choosing a brand of essential oil. Adding a huge external transmission much cooler is the greatest thing that can be done for your 700r4, regardless of which fluid you choose.
The TV Cable Link
This may seem unrelated in order to fluid, but hear me out. The 700r4 uses a Throttle Valve (TV) cable to regulate internal line pressure centered on how much down your foot is on the particular gas. If that cable is misadjusted, the transmission won't have enough stress to clamp the particular clutches, and it'll start slipping.
When it slips, it creates huge amounts of high temperature, which fries your transmission fluid within record time. You could have the most costly, high-end racing fluid in the planet, when that TV cable isn't established right, you'll still burn up the transmission in a several miles. Always double-check your cable adjusting whenever you're carrying out fluid maintenance.
Common Signs Your Fluid Needs a Change
You don't always possess to wait for the 30, 000-mile mark to change things out. Occasionally the transmission informs you it's time.
- Discoloration: Clean fluid is vivid red. If it appears to be cherry juice, you're good. In the event that it appears like muddy water or dark wine, it's toast.
- The Smell Test: Provide the dipstick a sniff. In the event that it smells "sharp" or burnt, the fluid has lost its ability in order to protect the internals.
- Gradual Shifts: When the gear modifications feel "lazy" or soft, old fluid might be losing its hydraulic integrity.
Making the Final Choice
Therefore, which one in case you grab off the shelf? If a person want to perform it safe and you're on a budget, look for a "High Mileage" or "Multi-Vehicle" ATF that specifically provides Dexron III/Mercon suitability. Brands like Valvoline or Castrol create great versions of this including seal off conditioners, that are a godsend for 700r4s that have already been sitting in a barn for a decade.
In the event that you've got a high-performance build or you just would like the best defense possible, go with a full man made like Amsoil or Mobil 1 Synthetic ATF. It's more expensive, but thinking of a rebuild for a 700r4 can cost $2, 000 or more these days, an extra $50 in fluid is definitely a comparatively cheap insurance policy.
Remember in order to change your filtration system every time a person change the fluid. There's no point within putting clean, costly oil through a dirty, clogged filter. It's a sloppy job, but your own Chevy will be glad for it with clearer shifts and a much longer lifespan. Keep that fluid red, keep this cool, and your own 700r4 should maintain clicking with the things for a long time.