Need help
- Thread starter kaylah
- Start date
If you are talking about the speedometer you can change the gear in the transfer case to fix the reading.
You shouldn't have to do anything....the only difference is you will run a little higher rpm's with the gear change...makes it better for bigger tires later on
You have a Renegade, and this is a TJ forum, but with gears it doesn’t matter what your rig is. The change in gears from 3.07 to 3.73 won’t affect your gearbox. There’s nothing to tune. Carry on.
Ok before everyone starts throwing comments around, tell us exactly what you’re trying to achieve. Your post is too vague. What are you trying to achieve when you ask about “tuning the gearbox to suit gear change?”
With a 30" tire driving at 70 mph with 3.07 gears the engine would be spinning around 2400 rpms, but with 3.73 gears driving at the same speed with the same tire size the engine would be spinning around 2900 rpms; this is without figuring the speedometer gear ratio into the calculations.
You need to calculate the tire size to differential gear ratio using the chart below to adjust your speedometer readings (calibration).
You need to calculate the tire size to differential gear ratio using the chart below to adjust your speedometer readings (calibration).
I am wondering why my vehicle now surges between gears and why while driving if I put my foot down it surges. Maybe has nothing at all to do with the gear ratio change maybe has to do with the engine
ChasUGC
TJ Enthusiast
Nice Jeep. I always loved those special edition Jeeps, with their awsome side banners.
Any idea why is would surge between gear change or when putting my foot down while driving
@TheBoogieman is right, you have the 3-speed auto if you have a 2001. Like he said, you might be feeling a better throttle response to the gear change. It adds a little power back after switching to larger tires. It’s going to feel a lot more touchy. If it’s surging in between shifts (like it’s not shifting immediately) that sounds like a transmission problem.