Quote:
|
Originally Posted by Hellz
but will also sheer more easily than the higher gears....
again, this is from what i have read and what not.
i have no idea how crazy 4x4-ing these guys are doing.
but adding more teeth means something has to give to make room for them.
that is the groove depth.
so shallower depth, means finer teeth, means easier to sheer them off.
|
This can happen if quality gear sets are not purchased and installed properly. Larger tires affect your vehicles final drive ratio and if you have not changed your differential gears to match the changes in your tire size then your vehicle is not performing efficiently. Your vehicle will feel sluggish and slow to get going. Your motor will lug and your transmission will be shifting around and working much harder than it should. This causes shorter transmission and engine life and puts greater stress on your drive train components.
Adding taller tires or higher-ratio gears reduces engine rpm at all road speeds and gives the truck less mechanical advantage to help it crawl over an obstacle or get moving from a stop. Lower gears increase engine rpm and acceleration / crawling capabilities. Remember that low gears are higher numerically (4.88 is lower than 4.56).
Adding taller tires can cause the engine to lug below its power band and cause poor performance. To fix the problem, you need to swap to lower-ratio axle gears. But many ?wheelers want gears that make the overall combination even lower than stock to improve off-road performance or increase a vehicles towing abilities.
4 Reasons To Change Your Gear Ratio.
1. OFFROAD PERFORMANCE WILL BE GREATLY IMPROVED
Even a simple change from a 31″ diameter tire to a 33″ diameter tire will affect the amount of available torque by 10%. Lower gearing will enable you to have far greater control when crawl over rocks and other obstacles with greater control and put less strain on your vehicles other components. This will greatly reduce the risk of breakage to hubs, axles, drivelines and suspension components.
2. STRESS TO THE DRIVELINE WILL BE GREATLY REDUCED
Modern day transmissions cost $600 or more to perform a basic overhaul. Driving with even a 10% larger tire will result in the transmission being under the same load as always being driven on an incline. The transmission may not suddenly fail, but the life will definitely be reduced by thousands of miles.
3. MPG and ENGINE EFFICIENCY WILL BE REGAINED
RPM alone does not affect fuel mileage. An undergeared vehicle (as the result of oversized tires) will result in a substantial loss of fuel mileage. Also, just as with the transmission, your engine life will greatly be reduced. Changing your axle gear ratio will stop the motor from having to work so hard and increase your fuel efficiency.
4. TOWING ABILITY WILL BE INCREASED
Changing your vehicles axle ration to a lower gear will increase your vehicles ability to tow efficiently. The engine, transmission and the rest of the drive train components will not have to work nearly as hard when you are towing.
