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Old 06-10-2017, 09:16 AM
berettaguy berettaguy is offline
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Location: Houston, TX
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Driveshaft help with a lifted GW

Hi folks,

I have an '89 Grand Wagoneer with a 6 inch BJ's lift and a stock 360/727/NP229 drivetrain. A couple of weeks ago I was driving home from the butcher shop, thankfully on a pretty quiet street, and I heard a loud clang and a series of smaller clangs and had no power. I coasted it maybe 40-45 ft into the nearest parking lot, and found my driveshaft lying on the ground. It's the first pic here:

http://imgur.com/a/GkcM4

Uh-oh. I had the car towed immediately over to my mechanicís shop. He brought the rear driveshaft over to the driveshaft shop to be checked out, and they told him the rear shaft was slightly bent and needed to be replaced (to the tune of a few hundred $$$). I'm pretty sure he had to get a new U-joint, and I assume he bought new hardware and straps for it while he was there, but I'll double check next time I see him.

Yesterday I received a call from my mechanic, and he says that the front yoke on the rear driveshaft needs to be replaced, but his usual local suppliers don't have them. I went over to his shop where I picked up the yoke so I can take some measurements. As you can see in the second and third pics in that album, the yoke definitely has some unusual wear on it. Is that part just called a slip yoke or rear transfer case yoke or is there some other special name for it?

I sent an email over to the FSJ email list (those guys rock), and they suggested that the abnormal wear was the result of too steep a driveline angle. Visually that makes sense to me. They also suggested that the solution was to convert to a CV style shaft. Do you guys agree with that? Since I already had a new rear driveshaft made, thatís not too appealing to me. Is there such a thing as a high angle transfer case yoke that has more tolerance? I honestly donít do any hard core wheeling, but I have 33" tires and hate having to replace the same parts over and over again. What do the off-road gurus suggest?

Lastly when searching for stock replacements I ran across a few different part numbers listed from Dana-Spicer.
https://www.summitracing.com/parts/sdh-211355x/overview/
or
http://www.oreillyauto.com/site/c/detail/SPI0/248091X/06672.oap?year=1989&make=Jeep&model=Grand%2BWagone er&vi=1182372&ck=Search_driveshaft+yoke_06672_1182 372_2267&keyword=driveshaft+yoke&pt=06672&ppt=C036 2
or maybe this Crown part is right:
https://www.summitracing.com/parts/c...ew-process-229

Do you guys know which the correct one for our application is?

Thank you in advance for the advice!
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Old 06-11-2017, 05:59 PM
77Deepj20 77Deepj20 is offline
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Join Date: Jan 24, 2016
Location: new jersey
Posts: 57
I can't imagine you would need a higher angle driveshaft with a 6" lift
. A CV driveshaft doesn't have anymore working angle than a single u joint in most setups, its used when the proper driveshaft ujoint angles cannot be achieved, not to gain working angle.

I couldn't get your link to work do I cant help with the yoke, but if the driveshaft does not have a expansion yoke built into it, then the attachment to the transfer case is.a slip yoke. If it does, then the yoke on the transfer case is fixed, bolted on, and is a fixed yoke. The yokes on the driveshaft itself that are welded to it are weld yokes and a usually.pretty common and inexpensive but need to be matched to the driveshaft tube OD and ID
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Old 06-23-2017, 10:30 AM
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CutterN55 CutterN55 is offline
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Join Date: Mar 09, 2009
Location: Sneads Ferry, NC
Posts: 1,129
I think the XJ shaft yokes will work if I remember right. If not you can grab a whole 1310 double-cardon rear and modify it to meet your needs. A Bj's 6" lift does not normally warrant new shafts but it will put your stock shaft a little on the extended side. angles usually aren't an issue though with their 6" lift as well.

If it were me, I'd source another stock rear shaft, put some good 760X U-joints in it, and rebuild the cardon joint. you can do all this yourself with a vise and a couple sockets or a brass drift a 3lb hammer, and some determination.
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