Is high RPMs bad for an automatic transmission?
The question of rpm-related transmission damage is an interesting one, since it does happen — just not in the way you might think.
When does the D3 gear in an automatic transmission have any?
In short, the D3 gear utilizes the first three gears in an automatic transmission or locks it on the third gear. It will move to a higher gear when the vehicle reaches the highest RPM. It will move to a higher gear when the vehicle reaches the highest RPM.
Why does my 2000 Cirrus have a shift problem?
Hello, thanks for writing in about your 2000 Chrysler Cirrus. The transmission control module would need to be scanned to see if the codes stored may indicate the shifting problem you are having. You may have an internal shift solenoid problem causing the shift problem.
What happens to gears in a high speed transmission?
An additional risk to gears in a high speed transmission is scuffing failure. Gear scuffing occurs when the lubrication film between the two gear flanks breaks down. When this occurs the tooth surfaces instantaneously weld together and are then pulled apart due to the combined sliding and rolling action of the tooth contact.
What should the cruising rpm be on a 283?
You should be looking for 2200-2400 cruising RPM at around 70-75 MPH, at least a 3:73 gear, but check out the article, Hotrodhill. The 283 is gonna like the extra gearing with the taller tires….especially since your using the 462 heads…..small cam or not.
What should the engine RPM be at cruise?
Since there is only a minor amount of load on the engine at cruise, the slippage is probably 200 rpm so we’d have to add 200 rpm to 2,587 rpm—making the actual cruise rpm very close to 2,900 rpm. Now we have some baseline information from which to make decisions.
What’s the gear ratio for a 70 mph car?
We will plug in inputs of 70 mph, a 3.08:1 rear gear and a 28-inch tall rear tire: rpm = mph x gear ratio x 336 / tire diameter rpm = 70 x 3.08 x 336 / 28 rpm = 72,441 / 28
What’s the cruising rpm of a 70 351C?
That being said, the ’70 351C 4V motor (10:1, big ports, small chambers, single plane intake, 650 double pumper) I used to run was OK with its 3.25 gears and a cruising RPM at 60MPH of about 2400RPM….I got mid teens with it for mileage. It could have been much quicker with more gearing.