When do you replace the rear driveshaft?

[JeepOfTheseus]

Is it normal to need a spacer with just a 3.5" lift and the 2 piece driveshaft? I'd probably just invest in a 1350 driveshaft before spacers.

Guessing you're talking about a single piece 1350? There is a factory-like 1350 2-piece from Dana Spicer. Going single is one of my biggest regrets...I still haven't gotten rid of the vibration at higher speeds.

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[Renegade]

To all the people on this thread talking about upgrading your rear driveshaft u-joints, please go look at your rear driveshaft and evaluate the current condition of your u-joints. Report back your findings.
Spoiler alert- Stock JT rear driveshafts don’t have u-joints.

 

[ericw.]

Guessing you're talking about a single piece 1350? There is a factory-like 1350 2-piece from Dana Spicer. Going single is one of my biggest regrets...I still haven't gotten rid of the vibration at higher speeds.

Appreciate the feedback from personal experience. JE Reel 2 piece is the likely choice I'd go with.

 

[Chasm]

It makes me smile to think that a repair shop would be bold enough to tell someone a drive shaft was just worn out. Not that he was saying that, just the idea of it.

Reminds me of when a guy told my wife her dipstick showed the transmission fluid was low, worn out and needed to be flushed. She called me saying it didn't sound right. I told her to get her car and get out.
First off, no one in their right mind would "flush" a transmission at 150k miles unless they wanted to buy a new transmission. Second, it didn't have a dipstick or trans fluid. It was an old school manual.

He called me back trying and failing to explain the importance of clean atf. I said "did you drive the car into the shop?"-yes. "Think about it...". He just said "oh" and hung up.

 

[ericw.]

It makes me smile to think that a repair shop would be bold enough to tell someone a drive shaft was just worn out. Not that he was saying that, just the idea of it.

Reminds me of when a guy told my wife her dipstick showed the transmission fluid was low, worn out and needed to be flushed. She called me saying it didn't sound right. I told her to get her car and get out.
First off, no one in their right mind would "flush" a transmission at 150k miles unless they wanted to buy a new transmission. Second, it didn't have a dipstick or trans fluid. It was an old school manual.

He called me back trying and failing to explain the importance of clean atf. I said "did you drive the car into the shop?"-yes. "Think about it...". He just said "oh" and hung up.

That's a wild story. lol they saw your wife and thought it was payday.

Yeah the shop I'm referring to was just making a suggestion for upgrade since we're replacing a ton of stuff already. I might do it still.

 

[Minty JL]

I'm on the MC 4.5" GC kit and still have the OEM rear driveshaft the AEV carrier bearing drop

 

[Vtur]

That's a wild story. lol they saw your wife and thought it was payday.

Yeah the shop I'm referring to was just making a suggestion for upgrade since we're replacing a ton of stuff already. I might do it still.

I'm not running a 1 piece DS. But physic wise, 2 shorter piece of tubes supporting by a bearing in the middle is more forgiven to imbalance and wobbles.

 

[Janster]

To all the people on this thread talking about upgrading your rear driveshaft u-joints, please go look at your rear driveshaft and evaluate the current condition of your u-joints. Report back your findings.
Spoiler alert- Stock JT rear driveshafts don’t have u-joints.

. Ok….so, the Rzeppa / CV joint is the failure point …….

 

[LowOnCash]

Pure BS driveshaft and U joints almost never go bad - find a new shop ( if you can)

 

[ericw.]

Pure BS driveshaft and U joints almost never go bad - find a new shop ( if you can)

"I didn't read the thread but wanted to reply anyway" lol

There's no bad driveshafts or U joints to speak of in this thread.

 

[tysongladiator]

I have a 2019 JTO with over 200k miles that I rock crawl and tow with. I have a 3.5" MC lift. I still have the stock driveshaft. The only thing that I have additional is a rock jock spacer. Regeared and lockers. And the stock driveshaft is still putting in work.

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