- Joined
- Jun 15, 2021
- Messages
- 191
Folks, I have been lurking a long time... this is a great resource.
I have a 2006 Mercury Grand Marquis (Panther) with the 4R75E four speed transmission.
The ratios on the transmission are: 1:1 in 3rd gear and 0.7:1 in 4th (Overdrive).
I drive mostly at 50mph on hilly terrain, and like to turn off the OD, meaning I am driving in 3rd at 1:1.
I have heard that 1:1 is good for the transmission because everything is turning at the same rate, and you sacrifice some MPG, but the transmission will last longer.
I have also heard that anytime you are at less than top gear, your are prematurely wearing your engine as it has to turn at higher RPM, and you have the additional issue that at 1:1 each tooth on the drive gear contracts the same tooth on the driven gear and that can cause problems of its own.
So, with respect to Transmission Wear is 1:1 better or worse?
With respect to engine wear?
Any insight would be appreciated.
Thanks in advance!
I have a 2006 Mercury Grand Marquis (Panther) with the 4R75E four speed transmission.
The ratios on the transmission are: 1:1 in 3rd gear and 0.7:1 in 4th (Overdrive).
I drive mostly at 50mph on hilly terrain, and like to turn off the OD, meaning I am driving in 3rd at 1:1.
I have heard that 1:1 is good for the transmission because everything is turning at the same rate, and you sacrifice some MPG, but the transmission will last longer.
I have also heard that anytime you are at less than top gear, your are prematurely wearing your engine as it has to turn at higher RPM, and you have the additional issue that at 1:1 each tooth on the drive gear contracts the same tooth on the driven gear and that can cause problems of its own.
So, with respect to Transmission Wear is 1:1 better or worse?
With respect to engine wear?
Any insight would be appreciated.
Thanks in advance!