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Please take a look at my driveshaft...

Mon Jan 11, 2021 4:59 am

Aloha from Hawaii y’all!

I’m slowly trying to make my 89 LS leakfree, a lofty goal I know. As I was degreasing the undercarriage, I noticed this broken/damaged spot on the driveshaft. Would any of you knowledgeable folks know what this part is called, and where it may fall on the priority of fixing? Big mahalos, sending warm sunshine vibes your way!

Keith

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Re: Please take a look at my driveshaft...

Mon Jan 11, 2021 12:18 pm

Hello Lasticaca , that looks like the slip joint , it allows the driveshaft length to change under load and suspension cycling. Front or rear ? The front driveshaft ( at least on my 93 ) does not move around too much , as the transfer case and differential are rigidly mounted. the slip joint allows you to collapse the driveshaft for service and disassembly. The rear drive shaft moves around a bit more. You can repair it a few way , in all scenarios , the driveshaft needs to be removed. So.... 1. take it to someone who is a skilled welder , clean it, mend it and file it smooth. 2. buy a new one. 3. find a used one. 4. a driveline shop can easily do this service. Which island are you on ? Cheers , Eric

Re: Please take a look at my driveshaft...

Mon Jan 11, 2021 12:27 pm

If you do separate the drive shaft pieces, put them back together exactly as they came apart ...matching the splines and the yoke ends. if they are not aligned properly , the yokes will be out of phase and vibrate tremendously , as the u-joints articulate . Super not fun. there is a youtube video that explains the driveshaft and u-joint dynamics

Re: Please take a look at my driveshaft...

Mon Jan 11, 2021 1:24 pm

www.youtube.com/watch?v=gmV4qwLfOMY

Re: Please take a look at my driveshaft...

Mon Jan 11, 2021 2:48 pm

Isn't that a rubber dust boot?

Re: Please take a look at my driveshaft...

Mon Jan 11, 2021 9:55 pm

On blowing the picture up, it appears to be what's left of the rubber boot. Dennis

Re: Please take a look at my driveshaft...

Tue Jan 12, 2021 8:35 pm

Eric B, thanks for taking the time to reply! It looks like the consensus is the broken part is the remains of the rubber dust boot. I'm over here on Oahu btw. You ever been to Hawaii?

Mudoilngears and DSUZU, thanks for helping me out with this! First gen Troopers are super rare down here. And being 2500 miles from the west coast makes it crazy expensive to get any parts. I'll keep at it though!

This forum is a major benefit, thanks again for your help everyone!

Re: Please take a look at my driveshaft...

Tue Jan 12, 2021 10:19 pm

I was on Oahu, Big Island, and Kawai (with a brief stopover on Maui) back in '82. Of course, Troopers were still on the drawing board back then. What DID impress me was the number of OLD cars I saw sitting around (30s vintage). It included an abandoned car in the woods off the runway on Maui, and seeing a 32 Woody sitting in someone's yard. There was also a sighting of the actual (original) Magnum Ferrari. Dennis

Re: Please take a look at my driveshaft...

Wed Jan 13, 2021 12:26 pm

Lasticaca, yes , we have been to the islands many times over the years. Our last visit , Pele' was doing some remodeling at the Leliani Esates. Incredible to witness, We dive ....some of my favorites are the Ahihi-Kinau Natural Reserve area on Maui, Cook's Monument on Hawaii, and the Molokini Shoal. Spent some time hiking Haleakala too. We visited Oahu some time ago.

Mine is different , but that probably is a rubber part, and not expensive. it helps keep the grease in

Re: Please take a look at my driveshaft...

Wed Jan 13, 2021 4:18 pm

Just posted about a very similar issue with mine. Recently replaced the u-joints and rear diff seal. Could this be a similar or the same issue? Thanks as well over this way.

Re: Please take a look at my driveshaft...

Wed Jan 13, 2021 5:03 pm

Here are some pics as well. Can’t see anything visibly wrong. Just a shutter at speed and grinding and knocking in reverse.
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