In the case of
manual transmissions
, overdrive is the highest gear of the transmission but has to be engaged by the driver. In a five-speed transmission, overdrive is the fifth gear; in a six-speed transmission, overdrive is the sixth gear; and so on.
Does a 727 have overdrive?
Convert Your 727 To A Six-Speed Overdrive With
Gear Vendors' Tailshaft-Mounted Overdrive Unit
. … With the overdrives came the additional benefits of reduced engine wear, noise, and effortless high-speed cruising. Crank any new vehicle up to 90 mph, and it's a Sunday drive.
Does a-727 transmission have overdrive?
If you own a car with a TorqueFlite 727 or 904 3 speed auto – you own one of the best transmissions ever built. By adding the Gear Vendors you get to keep this great trans and add
overdrive
and performance gear-splitting ratios to it. … Gear Vendors reputation is all about performance and handling horsepower reliably.
Do all transmissions have overdrive?
Virtually all vehicles
(cars and trucks) have overdrive today whether manual transmission or automatic. In the automotive aftermarket you can also retrofit overdrive to existing early transmissions.
What is the difference between a 727 and 904 transmission?
Re: What is the difference between the 727 and the 904 transmission? The 727 was the only available automatic transmission for big block cars. You could get a 727 for a small block, which where mostly for 340's and 360's or you could get a 904 which was primarily for the
318
.
When should you not use overdrive?
Remember, you don't use overdrive if you are
driving less than 50 mph
because it's not fast enough or consistent enough. It will not benefit your car to use it when you are driving at slower speeds or in stop and go traffic. The overdrive will only prolong the efficiency of your car's engine if you use it wisely.
Should I drive with overdrive on or off?
Overdrive improves fuel economy, and makes for less wear and tear on the vehicle when you are driving at highway speeds. Having the
overdrive off
is fine if you are driving in hilly areas, but if you are on the highway, it is best to have it on because you will get better gas mileage.
What does 4 speed with overdrive mean?
Overdrive as a definition is simply having a
faster transmission output shaft speed than the input rotation speed of the
input shaft from the engine. … You may associate ‘going into overdrive' with classic cars, particularly ones that only have four forward gears.
Does overdrive make faster?
Overdrive can help a car to go faster
, but it's really focused on allowing the engine to run at a lower RPM while maintaining the vehicle's current cruising speed. Overdrive is an incredibly useful feature, and it's one you should use the vast majority of the time.
Is overdrive just another gear?
“Overdrive” is technically
just a category of gear ratio meant for cruising on highways
(ratios less than 1:1, as /u/BmanUltima said), but some automatic vehicles won't upshift into the overdrive gear(s) without your say-so; there was an automatic truck at a place I worked at that had “Overdrive” as a “gear” separate …
Are 727 transmissions any good?
When speaking of automatic transmissions, the Chrysler A-727 or TorqueFlite 8 units are not only easy to find because of their many years of use, but they are also
very strong
and can be used in many performance and non-Chrysler applications, as well.
How much HP can a stock 904 handle?
As everyone has said, a properly built 904 will take that
360
without an issue.
Are all 904 transmissions the same?
Both the 727 and 904 versions of the TorqueFlite
are similar in design
, although none of the components are interchangeable between the two with the exception of the valve body, though calibration is different.
Is it OK to tow in overdrive?
It's not a good idea to tow while in overdrive
on any road other than a flat one. The engine will be in a higher gear, providing less torque. The transmission will be overtaxed, using fewer revolutions per minute. As a result, the truck or RV will have more difficulty towing cargo uphill or downshifting to go downhill.
At what speed should you use overdrive?
Overdrive helps when you
drive at more than 50mph
. Overdrive (OD) proves to be the highest gear during the transmission. All this arrangement happens in an automatic car. Furthermore, it will reduce the engine's RPM to the required road speed.
What does turning off overdrive do?
If overdrive is turned off,
the transmission can be fixed to a lower gear
, the response to the accelerator becomes better, and the engine brake becomes more effective.
