|06-26-2013 09:20 AM|
|99GoldenSahara||Has Goodyear beefed up the Duratrac sidewall recently? Just curious since that's always been stated as the only reason not to buy them. Sorry replied to wrong thread. Duh|
|06-26-2013 09:16 AM|
|06-26-2013 07:51 AM|
Here is a pretty cool youtube video that hits on gear ratios a little bit-
How a Differential Works and Types of Differentials - YouTube
|06-25-2013 11:15 PM|
|06-25-2013 10:36 PM|
I thought you could adjust the speedo, but I never knew how.
Does the tach need adjusted any, with gearing and tire differences, or would the RPMs be accurate?
|06-25-2013 09:05 AM|
You need to change the speedo gear in your TC if you're sure your speedometer is off. Search for a chart that tells you the right size speedo gear (teeth count) for your tire size/gear ratio.
|06-25-2013 12:37 AM|
|06-25-2013 12:07 AM|
Even when my jeep was completely stock I couldn't shift at the preset points, and retain any momentum going up a slight incline.
|06-25-2013 12:03 AM|
Does changing the gearing and tire size effect the RPM reading and shifting points?
I'm geared to 4.56 with 36" tires.
I noticed my speedometer is about 10-15 mph higher than my actual speed.
I also noticed that my upshift light comes on at odd times (sometimes it will come on at 2000 RPM and then go back off as I go higher (doesn't really make sense to me).
|06-24-2013 02:11 PM|
|jquinn83||Thanks for this thread I learned a lot. Jerry is like an Encyclopedia Jeep!|
|06-24-2013 01:55 PM|
|06-24-2013 01:07 PM|
|Dextreme||I know this thread has a few twists-n-turns (pun not really intended), but one consideration that hasn't been mentioned yet in this thread is the "size of the axle". A d44 with 33", will have more ground clearance than and d60 and 33"s, so many opt to not go with d60's and instead build strong d44's and stick with 33"-36" tires.|
|06-24-2013 12:45 PM|
I ran 5.38 s in my JK Rubi with 35s and it was perfect. I recommend you do he same.
|06-23-2013 11:36 PM|
|Gily||I bought 5.38 from northridge 4x4 last week and the called me and told me it was better to have 5.12 for 35" and I switched to 5.12, I should get them next thursday.|
|06-23-2013 08:58 PM|
|Jerry Bransford||With your automatic 5.38 will barely be low enough for 37" tires but that ratio would be absolutely perfect for 35" tires. Regearing is probably going to be pretty close to $1300-1500 for all parts & labor. I got my last regearing done for just under $1100 but that was only after some serious negotiating.|
|06-23-2013 08:51 PM|
|Gily||3.8, Auto, rubicon Dana 44s|
|06-23-2013 08:50 PM|
|06-19-2013 10:24 PM|
|06-19-2013 09:15 PM|
|06-19-2013 09:13 PM|
|Gily||Thanks, I just ordered a package fron northridge 4x4 with front and rear yukon gears 5.30 and installation kit, how much do the installation run?|
|06-19-2013 09:08 AM|
|Happy JK||Also you want the front and rear gear to match, so if you do regear it would have to be both axles. Otherwise you can't use 4wd, the vehicle would be fighting itself|
|06-19-2013 08:43 AM|
Yes. Both, if you want to use 4 wheel drive.
Whichever brand your installer sells and will stand behind.
|06-19-2013 08:13 AM|
|Gily||WhAt geAr brand is the best?|
|06-19-2013 08:12 AM|
|Gily||How much will the regear cost?|
|06-19-2013 08:12 AM|
|Gily||Is 5.38 good for 37's? Which gears need to be chsngef?|
|06-18-2013 09:25 PM|
|06-18-2013 09:21 PM|
|06-18-2013 09:10 PM|
|06-18-2013 09:01 PM|
Running too high of a ratio can reduce your top speed which means going to a lower ratio can increase your top speed. For example if you were running 3.07 gearing & increased your tire size to 35", you'd barely be able to maintain a legal speed on the highway. Going to a lower ratio will raise the engine rpms in that case which will increase power & thus the top speed.
|06-18-2013 08:55 PM|
Gear ratios are considered your final drive ratio, as said the lower the gearing (numerically higher) gives you more revolutions of the driveshaft compared to the tires. This is also a torque multiplier, in 4wd low the number can be pretty astounding.
Numerically high gear ratios provide better acceleration because you have more torque at the wheels for any given RPM, but lowers your top speed. Numerically low gears are the opposite, raise your top speed but hurts your acceleration.
In the world of off road you want torque.
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