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2.5 lift...question

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Old Apr 3, 2017 | 08:15 PM
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2.5 lift...question

i installed a 2.5 ready lift with 4 inch block in the back. after the install i now notice my output shaft has come out of the transmission about 1-3/8". has anyone else noticed this. i have asked a few folks on social media, who didnt know about this and it appears that thay have same issue with the shaft being pulled out around 1 inch. should we be concerned about this?? any help would be appreciated.
 
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Old Apr 3, 2017 | 10:01 PM
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Post a picture?
 
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Old Apr 4, 2017 | 06:02 AM
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the rust spot is the amount that was always showing. after the 2.5 went on, u can now see the shiny part on the left of the rust spot
 
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Old Apr 4, 2017 | 06:03 AM
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i imagine most anyone with a level kit, 2.5 or 3.5, is having this same experience yet they may not be aware. should we be concerned?
 
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Old Apr 4, 2017 | 07:26 AM
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Yes, you can see the start of the spline at the edge of the dust boot if you look careful. Highway and home depot runs probably be Ok but try and keep it level. I have it lengthened
 
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Old Apr 4, 2017 | 07:32 AM
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when you say keep it level....you mean keep it on the pavement?! im just confused or rather alarmed cause there are 1000s of 2017s with level kits and they got to have the same issue. makes me wonder if lift companies totally missed this or maybe im missing a step...by like adding a drive shaft spacer?
 
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Old Apr 4, 2017 | 08:50 AM
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very common if you lifted the rear. you went with a 4” block? is the stock block 3”?
I don’t know about the Ford, but on the GMs and Rams, that spline shaft is generally pretty long and has a good amount of engagement on the t-case output shaft.

you can unbolt your shaft at the rear pinion and slide the shaft out of the t-case and see how much remaining shaft you have engaged.

I would bet it is fine. there are trucks with bigger rear lifts and no mods to the driveshaft
 
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Old Apr 4, 2017 | 09:00 AM
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stock rear block is hair over 3 inches. the block installed is almost 4 inches...so the rear only came up about 3/4". i figured this was common issue but just making sure it doesnt cause future issues.
 
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Old Apr 4, 2017 | 09:02 AM
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i may unbolt the drive shaft to see how much is on the other end of the output shaft...just to get an idea.
 
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Old Apr 4, 2017 | 04:02 PM
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Originally Posted by hoot12
i may unbolt the drive shaft to see how much is on the other end of the output shaft...just to get an idea.
​​​​​​That's not a bad idea to verify spline engagement. Mine with a level only looks to be pulled out 3/4".
 
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Old Apr 8, 2017 | 01:36 PM
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as the truck gets higher it pulls the slip yoke further out of the tcase. the problem gets worse the higher the truck is. the same will happen on the front driveshaft, the slip joint gets pulled farther apart. in extreme cases of offroading it could pull the yoke completely off the tailshaft, depending how far the truck is lifted. the other thing that happens is the ujoints are put on a steeper angle. lift companies don't usually tell you this because they want your money. for small lifts your not likely to have any serious problems, especially if you never go offroad but still you may experience increased ujoint wear and possibly some extra vibration
 
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Old Apr 8, 2017 | 01:49 PM
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I'm really curious to see if everybody else with a leveling kit is having the same issue.

Because I'm not too comfortable have my driveshaft slide out that much.

Is it possible that the shaft slid out during installation? While the suspension is being dropped to install the leveling kit. And then the shaft hasn't been slid all the way back in after?
 
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