Rpm

[Backyard]

I have a 1990 Ford Ranger with a 2.9, V6 engine and A4LD Transmission with Overdriver. At 45 MPH the Tack reads 2000 RPM and at 55 MPH the tack reads 2800 RPM. Is this right, on other autos i had the tack read 2000 RPM at 55 MPH.

 

[Will]

If you have a stock Ranger with something like 3.73s with 205/75-15 tires your overdrive isn't working.

 

[VaGent]

I have a 1990 Bronco II running 215/75R/15 tires with 3.73 gears with the A4LD tranny. At 45 mph my tach says 1450-1850 & at 55 mph it's reading around 2150-2500 depending on the road condtions. At 70 mph it reads between 2850-3000 rpms. Sounds like you aren't going into Overdrive. My tranny goes into overdrive around 45-48 mph.

 

[dogboy]

I have a 4.0L, but my RPM's were (before tire change) at 2800 at 60mph with stock tires (235-75-15's), 3.73 hears, and the A4LD while in 3rd gear. If I let it shift into over drive I think the RPM's were right around 2100-2200 if remember correctly. With my 33's, mine shifts into overdrive right around 50mph.

Sounds like your tranny isn't shifting into overdrive.

Hope that helps

 

[Backyard]

Yes, all of you were right, it was the Overdrive. I am getting it fix now.

 

[dogboy]

Cool, glad you figured out what is was!