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Jeep Cherokee axle in KB1
Once you can go faster does the non synchro tranny become the problem? Down shifting is usually a challenge.
Thanks!
Earl
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The old and reliable.
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Earl wrote:Anyone done this before? It was free, and the same wheel bolt pattern. Ratio is better, from an automatic Jeep.
Once you can go faster does the non synchro tranny become the problem? Down shifting is usually a challenge.
Thanks!
Earl
1949 KB1
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nikkinutshop wrote:Captainbob, please!
Almost everything you wrote is incorrect.
A ratio change will not change the truck's speed. Only the engine to road speed relationship will change. A ratio of 3:73 over the OEM of 4:11 may allow the engine to push the truck to a higher speed at a given rpm. This may be possible only if the engine has the power to push the truck past the resistances that come into play when going faster.
This is where good brakes are important. Is the brake system able to convert the kinetic energy of motion into heat and not fade? I think a 20% speed increase may be compatible with OEM brakes. The load in the truck adds to the stopping kinetic energy. Reduce the load and there should be more brake left to handle a mild increase in speed.
My R120 could go over 90 miles per hour. I installed a 420 cubic inch V8 Diesel and 4X4 axles. The "R" had 4 wheel disc brakes. Stopping was never a problem.
I have posted the how to determine the engine revolutions per mile using the axle ratio and the tire diameter. This is simple mathematics.
Here is a copy and paste of what I wrote:
You need to calculate the circumference of tire by using 3.1415 X the diameter of 31.4 inches. Your tire circumference should be 98.643 inches or close to 8 feet. One mile is 5280. Divide 5280 by 8 feet ( 98.643"). You should get 3063 revolutions in a mile. One mile in a minute is 3063rpm.
40 mph is 2/3 of 60 mph. Divide 3063 by 3 and multiply that new number by 2 and you get an rpm
Spring mounts are an easy move. Adapting the hydraulic system to the replacement axle is as easy as replacing the parts that should be replaced anyway.
BTW. The center section, or chunk, as you have named it, can be off-center a few inches and not affect the driveline.
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