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Old 03-22-2013, 11:40 AM   #541
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Hey Ibuildembig....im new to soa and just bought an 88 with soa and 4 over springs and 1 over shackles ....it has d44 in front and rear with 4.11 gears....here's my problem ....when slowing down from 45 to about 20 I get a vibration coming from my rear end ...im not sure what it is but it only does it when im slowing down ...any ideas?....and another question I have is my front driveshaft has a lot of slop in it...new u joints but im afraid its to sloppy and will hit my trans case....any suggestions?

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Old 03-22-2013, 11:50 AM   #542
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What rear shaft are you running? Thats tall with that combo, what do you have for shaft angles?

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Old 03-22-2013, 12:19 PM   #543
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Its just an extended shaft...angle doesn't look to steep ...but im not seeing any weights welded on...could it just need balanced?
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Old 03-22-2013, 05:28 PM   #544
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I can see the weight in your pics, up bu the slip yoke. Looks like a washer.

Hard to see, but looks like your pinion angle is too steep. Should be about 3 degrees under, almost looks over, hard to tell from that pic though.
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Old 03-22-2013, 06:24 PM   #545
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Its a little under...I saw the weight after I took the picture ....do you think a cv or sye would help?
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Old 03-22-2013, 07:35 PM   #546
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Hard to tell the angle of the front joint. Side shot pic would be better but i bet its bad. I run a sye and a cv. I am only soa+2".

I know that ibuildembig doesnt like the cv's and doesn't use them but i do. I just shortened a front xj shaft. Now that i have a V8 im probably going to be changing that though.
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Old 03-22-2013, 07:51 PM   #547
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Does this help?
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Old 03-22-2013, 08:36 PM   #548
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Thats a pretty steep angle. What t-case is that? You already have a sye on it.
Two things that are not correct on your setup. First, your slip joint is a bit too far out, probably not your issue but your shaft needs to be about an inch longer.
The other is on that type of shaft you are supposed to have same angle at pinion as you do the t-case. Rolling the pinion up like that is correct for cv type shaft.
I dont know what problems it causes. Im sure one of the others will chime in soon.
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Old 03-22-2013, 09:11 PM   #549
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I know its this tag but not sure which numbers
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Old 03-22-2013, 09:21 PM   #550
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I believe it is a 208 AM
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Old 03-22-2013, 10:53 PM   #551
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Yep its a 208. 281 is the gear ratio.
You dont have a slip yoke in the t-case correct?

What is your engine/trans combo, just out of curiosity?
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Old 03-22-2013, 10:57 PM   #552
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Its an original 258 with 96,000 miles ....tranny is an automatic from a v8 wagoneer (plan on putting a v8 in sometime )....208 transfer case and dana 44 front and rear with 4.11 gears.....no slip yoke yet but am planning on that and woods cv drive shaft
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Old 03-23-2013, 01:07 AM   #553
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Based on your pictures you already have a standard length sye, you can go to a super short sye, but you will lose your speedo drive. Np208 would have a 2 piece tailshaft housing with a slip yoke that slips in the tailshaft. You have a bolt on yoke(from what i see) and a short one piece housing which means you already have a standard length slip yoke eliminator(sye). Only shorter setup is the supershort, but you lose mechanical speedo drive.
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Old 03-23-2013, 10:16 AM   #554
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So could o just pick up a cv or do I need to modify what I have?
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Old 03-23-2013, 11:35 AM   #555
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You need a cv plus a cv yoke for your t-case.
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Old 03-23-2013, 10:03 PM   #556
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What's a cv yoke?
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Old 03-23-2013, 11:11 PM   #557
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The yoke that is attached to your t-case output shaft is not compatible with a cv joint. Its a different yoke to connect to a cv versus a u joint.
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Old 03-24-2013, 11:44 AM   #558
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Thanks for all the great information ....im great with engines and harleys but never done much car suspension work
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Old 03-28-2013, 11:25 AM   #559
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SYE's are fine but CV shafts are junk and expensive. If your going to spend the money you might as well get a shaft made with bigger joints and put a larger yoke on the case. This will allow more shaft travel and add allot more strength that the puny 1310 joints the cv shafts use. I'm not sure what angle my rear shaft is on mine but its much nastier than that

Your front shaft probably has a bad slip joint in it if it moves with new joints in it.
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Old 03-28-2013, 11:34 AM   #560
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Quote:
Originally Posted by Ibuildembig View Post
SYE's are fine but CV shafts are junk and expensive.
I'm curious what makes them junk. I've never seen one break and I've known some guys with some high horsepower rigs and big tires that flog their stuff pretty bad. Do they break at the double cardon? or elsewhere? maybe crappy u-joints?

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Old 03-28-2013, 11:53 AM   #561
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Ford tried them in the 70's on the front shaft and they didnt last. Its twice as many parts and twice as much money versus a single joint. By big horsepower your talking how much? I have seen 2.5's break them. As far as I know a wrangler is the only 4x4 vehicle that people try them in on the rear shaft, but I could be wrong. For what it costs for a TW driveshaft, a guy could have a monster shaft done for less and way stronger.
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Old 03-28-2013, 12:12 PM   #562
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Quote:
Originally Posted by Ibuildembig View Post
SYE's are fine but CV shafts are junk and expensive. If your going to spend the money you might as well get a shaft made with bigger joints and put a larger yoke on the case. This will allow more shaft travel and add allot more strength that the puny 1310 joints the cv shafts use. I'm not sure what angle my rear shaft is on mine but its much nastier than that

Your front shaft probably has a bad slip joint in it if it moves with new joints in it.
So does that mean I need to replace the whole front shaft...so my angle doesn't look to steep on the rear?
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Old 03-28-2013, 12:21 PM   #563
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Well, you need to take it out and look at it. Either the splines are shot or the slip is shot, or the whole assembly is shot. You dont have to replace it all, just those parts.

Your rear angle isnt as bad as allot of them out there, but you could benefit from larger joints/yoke because it looks really close to hitting. Your pinion does look a bit high from the pic
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Old 03-28-2013, 12:35 PM   #564
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Do you know of a company where I can get the larger setup
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Old 03-28-2013, 12:37 PM   #565
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Close to hitting ?
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Old 03-28-2013, 12:50 PM   #566
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Quote:
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Ford tried them in the 70's on the front shaft and they didnt last. Its twice as many parts and twice as much money versus a single joint. By big horsepower your talking how much? I have seen 2.5's break them. As far as I know a wrangler is the only 4x4 vehicle that people try them in on the rear shaft, but I could be wrong. For what it costs for a TW driveshaft, a guy could have a monster shaft done for less and way stronger.
The few Jeep guys I know running CVs with big motors are both SBC builds, puthing 350-400hp. One of them is mated to the NP231 through adapters and the other used the whole driveline out of a full size blazer, so I think its a NP208. Other than breaking weak u-joints (they run solid Spicers now), they haven't reported any problems.
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Old 03-28-2013, 12:54 PM   #567
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Quote:
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Do you know of a company where I can get the larger setup
Any place that builds driveshafts can do it for you, buy local!

Quote:
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Close to hitting ?
Looks like the tcase yoke is close to hitting the driveshaft yoke because of the angle and small u-joints. Bigger stuff will fix that.
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Old 03-28-2013, 12:59 PM   #568
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[QUOTE="Ibuildembig;3563764"]

Any place that builds driveshafts can do it for you, buy local!

Looks like the tcase yoke is close to hitting the driveshaft yoke because of the angle and small u-joints. Bigger stuff will fix that.[/QUOTE
Thanks for the great information ....I think i'll steer clear of the cv shaft....another question I have is if anyone has changed their front upper shock mount to except a rear style shock....heard of alot of people breaking the stud on front upper shocks
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Old 03-28-2013, 01:42 PM   #569
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I have adapters in mine to do that. You have a lot more options on shocks that way.
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Old 03-28-2013, 02:29 PM   #570
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Well due to the monster lift I have nobody makes shocks long enough ....so I had to cut off my upper shock mount and fabbed up a rear style to replace it....now I just need to order my shocks

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