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- Joined
- Jan 20, 2015
- Messages
- 183
- Reaction score
- 3
- Points
- 0
- Location
- Westminster, Colorado
- Vehicle Year
- 1987
- Make / Model
- Ford
- Engine Size
- 2.3
- Transmission
- Manual
First post, long time lurker. I have an issue that searches have not provided me the answer to and looking for some assistance.
I have a 1987 Ranger, that has gone through significant changes since purchased a couple years ago. my problem is that the speedo is reading LOW compared to actual speed.
2.3 Turbo 4x4
M5OD-R1 with 1350 manual TC
3.73 gears in front and back
current speedo cable gear is the 16 tooth wine colored gear- smallest gear that I am aware is available. When the speedo is showing 25mph, the truck is actually going about 31mph per gps. It's my understanding that to correct this I would need a smaller speedo gear to compensate for the variance.
My question is this:
Can the DRIVEN GEAR that is inside the transfer case on the output shaft be changed to a larger tooth count to correct my issue? I may at some point change axle gear ratios, but not ready to pull that trigger just yet. I have a Dana 35 TTB front, and 96-up 8.8 rear with LSD and disc brakes and factory 3.73's. I am only running 30x9.5x15 tires, with the likely intent that we will drop back down to P235/75/15 once I burn off the rest of the tread on the existing tires. The tire size reduction helps my speedo error, but not by enough.
Any help is appreciated, or if this needs to be moved to a more appropriate place in the forums please let me know.
I have a 1987 Ranger, that has gone through significant changes since purchased a couple years ago. my problem is that the speedo is reading LOW compared to actual speed.
2.3 Turbo 4x4
M5OD-R1 with 1350 manual TC
3.73 gears in front and back
current speedo cable gear is the 16 tooth wine colored gear- smallest gear that I am aware is available. When the speedo is showing 25mph, the truck is actually going about 31mph per gps. It's my understanding that to correct this I would need a smaller speedo gear to compensate for the variance.
My question is this:
Can the DRIVEN GEAR that is inside the transfer case on the output shaft be changed to a larger tooth count to correct my issue? I may at some point change axle gear ratios, but not ready to pull that trigger just yet. I have a Dana 35 TTB front, and 96-up 8.8 rear with LSD and disc brakes and factory 3.73's. I am only running 30x9.5x15 tires, with the likely intent that we will drop back down to P235/75/15 once I burn off the rest of the tread on the existing tires. The tire size reduction helps my speedo error, but not by enough.
Any help is appreciated, or if this needs to be moved to a more appropriate place in the forums please let me know.
, I'll try to look in the next couple days to see if I can find it...
