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Old 08-31-2015, 11:03 PM
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mega short sye vs. regular sye

I have a 4" lift and eventually might add a shackle lift of 1". Is it a necessity to get the mega short sye or will the standard kit work? I guess my question is, what is the benefit of one or the other, if any? I'm getting ready to finally buy one. Also, should I know the length of the driveshaft or is that determined after the sye is installed. I'd appreciate your comments. Thanks!

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Old 09-01-2015, 07:06 AM   #2
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The mega short will give you a little more driveshaft length, and thus make your angles a little less severe. For only 4-5 inches of lift you probably don't need it. I have a 4.5" lift, I'm running a typical SYE, no problems.

That said, if the extra 100 bucks is no big deal to you, might as well go with the super short and give yourself room for growth. Either way you're going to need a custom driveshaft and a couple inches isn't really going to affect the cost. And yes, the best course is to install everything, then measure for your driveshaft. Morris 4x4 has a "super short" kit from TeraFlex that's about the same price as a regular SYE kit. Not sure if it's the same length as the "mega short", and I can't vouch for the quality of TeraFlex.

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Old 09-01-2015, 10:00 AM   #3
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I have about 5" lift and regular SYE with no problem. That said I can't think of a downside to a super short, having a longer DS is always good.
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Old 09-01-2015, 12:01 PM   #4
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The only downside to super short is that a sensor drives your speedometer directly. No more changing gears to adjust the speedometer.

To adjust your speedometer reading, you'll need a little electronics box - look for Speedo Healer or similar products.

If you can afford it, go for the super short. A longer driveshaft with better angles will be better in the long run.
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Old 09-06-2015, 07:44 PM
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What can one expect to pay a shop to install the sye? Am I better off doing it myself? How long should it take? I am mechanically inclined and realize i will need some snap ring pliers
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Old 09-07-2015, 01:55 PM
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Quote:
Originally Posted by StanF View Post
The only downside to super short is that a sensor drives your speedometer directly. No more changing gears to adjust the speedometer.

To adjust your speedometer reading, you'll need a little electronics box - look for Speedo Healer or similar products.

If you can afford it, go for the super short. A longer driveshaft with better angles will be better in the long run.
I noticed (2) mega short kits on Morris 4x4...one with speed sensor and one without? Could I use the non spd sensor model and use the speedo gear setup or no? $10 difference in price. I just want to order the correct one? What should I look for on my current transfer case?
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Old 09-07-2015, 11:37 PM
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Quote:
Originally Posted by 9T4YJ View Post
The mega short will give you a little more driveshaft length, and thus make your angles a little less severe. For only 4-5 inches of lift you probably don't need it. I have a 4.5" lift, I'm running a typical SYE, no problems.

That said, if the extra 100 bucks is no big deal to you, might as well go with the super short and give yourself room for growth. Either way you're going to need a custom driveshaft and a couple inches isn't really going to affect the cost. And yes, the best course is to install everything, then measure for your driveshaft. Morris 4x4 has a "super short" kit from TeraFlex that's about the same price as a regular SYE kit. Not sure if it's the same length as the "mega short", and I can't vouch for the quality of TeraFlex.
Will I be able to drive in front wheel only while waiting for the rear drive shaft? I will only be doing some local around town driving.
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Old 09-09-2015, 12:17 AM   #8
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My first SYE was purchased just before the the SuperShort SYE was developed. The SuperShort SYE did add some length. If you can swing it, do it right the first time.

Many people have smartphones. Use an app to verify your speedometer.
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Old 09-09-2015, 12:24 AM
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My first SYE was purchased just before the the SuperShort SYE was developed. The SuperShort SYE did add some length. If you can swing it, do it right the first time.

Many people have smartphones. Use an app to verify your speedometer.
Verify the speedometer? It will work, right? Just might be off a bit like it is now. With my 33's it shows abo7t 5mph slower than I'm really going.
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Old 09-09-2015, 12:47 AM   #10
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Yes, it works. However, there are many tire variations. Not all tires are the rated height. Not everyone is using the same gearing. Be sure of your actual speed to avoid meeting your neighborhood police.
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Old 09-09-2015, 01:23 AM
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Yes, it works. However, there are many tire variations. Not all tires are the rated height. Not everyone is using the same gearing. Be sure of your actual speed to avoid meeting your neighborhood police.
Ha-ha, yeah I got you. I drive like an old guy...my speeding days are over. Cool. Thanks. What tires and gearing do you run out of curiosity? I'm torn between 3.73 and 4.10 when I do my axle swap? I got 33's now, and most likely will stay with them..
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Old 09-09-2015, 03:11 PM   #12
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Ha-ha, yeah I got you. I drive like an old guy...my speeding days are over. Cool. Thanks. What tires and gearing do you run out of curiosity? I'm torn between 3.73 and 4.10 when I do my axle swap? I got 33's now, and most likely will stay with them..
33s with a 373 means you are a little weak on the hills but run well on flat roads. I run 33s and 410. I am about 2,850 rpm at 65, but can take a hill pretty well. Have to replace the speedo gear. And with a 5" lift the regular SYE works fine. If I went to 35s, that super short sye might be nice.
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Old 09-09-2015, 06:45 PM
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33s with a 373 means you are a little weak on the hills but run well on flat roads. I run 33s and 410. I am about 2,850 rpm at 65, but can take a hill pretty well. Have to replace the speedo gear. And with a 5" lift the regular SYE works fine. If I went to 35s, that super short sye might be nice.
Answers my question...going with 4.10's tha
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Old 09-09-2015, 06:46 PM
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...that's where I want a little more ability- to go up hills without the wind blowing me back!

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