Why are Slip yokes so bad?

I have the 241 T Case on my 90 Jimmy and was wondering why slip yokes are so bad. I know that if you pop a rear DS u-joint and that if you pull it you will lose ATF. But other than that what are so bad about them? Just trying to wiegh out the pros and cons about a SYE kit, thanks for any help.

 

a 205 swap is the best SYE kit on the market
but
if it isnt broke dont fix it

 

Hell yeah! Been there, done that.

 

That is the main concern. Loosing all the fluid.

Ken H.

 

In a stock aplication they are not really bad at all. They save weight and less parts involved. For a lifted 4x4 is where the problems strart making it worth the change.
With a slip shaft and fixed yoke when the suspension cycles the slip shaft is in direct line and collapses easy.
On a slip yoke as the drive line angle becomes more severe with a lift then the slip yoke will start binding because your not pushing inline with the way it travels.
Then there is the issue of busting up a rear shaft and no seal on the case if you have to run without it.

 

They also shorten your driveshaft a little, which makes the angles worse.

 

I'm pretty sure all of the 205 have low range. At least mine does. Anyone out there have a 205 with no low?

Eric M.

 

for starters you can get a 'never break' 205 for the price of a SYE kit ~$350

low range isnt that different, you are giving up a ton of reliability for a 3/4 point
as I origonally posted if it isnt broke dont fix it.

 

Something I haven't seen touched on in this post is the possibility of the driveshaft slip yoke "botttoming out" into the t-case. A friend of mine pushed his slip yoke rear drive shaft right into (and almost throught) the t-case on his J**P and it basically shattered the whole thing. Although I have never seen this on a slip yoke GM, I don't see why it couldn't. Just another possibility. Lance

 

Good answer Grim. 64k question: how much angle is too much? It seems to follow that the further you pull the slip yoke out the more it will tend to slightly cock and the worse the binding will be. Guess a sloppy yoke would be even worse yet.

Hate seeing that seal reason always brought up though. Running without a shaft is no problem, cheap plastic trans plug or home made plug and some duct tape works fine and is easy to keep in the trail box. Drove around a week like that waiting for the shaft to be made.

 

</font><blockquote><font class="small">In reply to:</font><hr />
it's hardly low, not even 2:1

[/ QUOTE ] id give up 1.96 for 2:1 /forums/images/icons/smile.gif
and why bother with an sye? just get the right 205 not all of em came with slip yokes....specially the '72 variety

 

Agree with "if it ain't broke don't fix it".
If the 3/4 point isn't a big deal then why would anyone pay $700 for 3:1 gears (just over 1 point) for the 205? That makes the 3/4 point worth $500.

 

Ley me count the ways they are bad...

Broke 2 of them in less then 8 months..

 

Now how exactly did you do that again? /forums/images/icons/grin.gif

 

OK, OK one was my fault.. But the other one wasn't... /forums/images/icons/smirk.gif

 

the only reason I could see buying the 3:1 set is to add to a doubler

 

JESSE/DRIVELINEMAN! Your help needed!

</font><blockquote><font class="small">In reply to:</font><hr />
Good answer Grim. 64k question: how much angle is too much? It seems to follow that the further you pull the slip yoke out the more it will tend to slightly cock and the worse the binding will be. Guess a sloppy yoke would be even worse yet.



[/ QUOTE ]

You know that's a good question. Let's see if Jesse see's this as can give us a good answer.

 

Re: JESSE/DRIVELINEMAN! Your help needed!

Thanks for all of y'alls opinion's, its just that I cant make my mind up if that slip yokes are that bad. I mainly do mud and trails. The only rocks the Jimmy will ever see will be any runs to The Slab or Mason, or maybe even Moab next year /forums/images/icons/cool.gif My rig is flexy, no doubt in my mind, last offroading trip where I blew the 350, I rubbed the 37's in the rear inner fenderwell /forums/images/icons/ooo.gif And it seems thats where the SY weaknes's is. I really dont plan to swap a 205 becasue i dont want to bother with adapters, VSS cables and shifter modifications. I have never had a problem with the 241 (knock on wood) so I plan to keep it, hell they even make a 4:1 kit for it if I wanted to crawl that bad. Steve ran a SY 241 for a long time and look at some of the trials he ran, Moab, Powerhouseetc... and he had no problems that I know of...