Drive shaft angle with SOA question

[Paul Bruchal]

If i put a SOA in the rear with stock leafs, do I still need a SYE? Or TC drop?

 

Mall Crawler for now BTW

[freakjeep93]

nope we have a long enough wheelbase that driveling angles arnt that bad

[Pete M]

yup. but an SYE is out a bit more than it really should and still a great (albeit expensive cine you're on the hook for the kit plus a new driveshaft) upgrade. going SOA pulls the driveshaft out about an inch and in some cases this can cause problems in certain circumstances (especially if there is a lot of wear and slop at the yoke). since yours is a street queen, you should be fine. :thumbsup: in either case, a slightly longer driveshaft should return everything to normal.

 

One caveat, U-joints don't like crazy changes in their operating angles. you can get vibrations from that alone.

[Paul Bruchal]

Thanks for your answers!

 

Now all I need for my lift is Control arms, break lines, shocks and a new tie rod.

[mkbruin]

When I SOA'd mine, I needed a new rear d-shaft. A local speed shop fabbed one up for ~$100.

 

The factory rear shaft was so short, when I hit a gentle riser on the highway the shaft slipped all the way out of the tailcone, dropped to the ground and grenaded my rear end. I had to be flatbedded home.

 

Keep driveshaft angles in mind:

 

[Paul Bruchal]

Did you use your stock rear leaf springs when u SOAed the rear?

okay, ill add CV drive shaft to my list!

[Pete M]

you can't add a CV shaft without a SYE. they go hand in hand. :thumbsup:

[mvusse]

Although I"m by no means an expert, and I have never seen it done, theoretically I see no reason why a double cardan CV joint can't be used with a slip yoke.

[mkbruin]

Did you use your stock rear leaf springs when u SOAed the rear?

okay, ill add CV drive shaft to my list!

 

Yes, all stock.

 

'89 SporTruck, 4.0/AX15/231, D35 rear.

 

[dakal]

Although I"m by no means an expert, and I have never seen it done, theoretically I see no reason why a double cardan CV joint can't be used with a slip yoke

 

 

thats what the former owner of mine did. i have vibration at the sye, but at this point unsure exactly is causing it. slop etc. dave

[Pete M]

thats what the former owner of mine did. i have vibration at the sye, but at this point unsure exactly is causing it. slop etc. dave

 

um, you can't have both a slip yoke eliminator and a slip yoke. I assume you have a slip yoke? pictures?

[dakal]

yep pic soon.

[carnuck]

Caddy and Buick used double cardan with slipyoke in the '70s, but it has to be at the diff end.

[dakal]

pete. here is pic of my tap and crap. thanks for the correction. dave

 

[Pete M]

so you do have an SYE. that would explain the CV shaft. :yes:

[Pete M]

Although I"m by no means an expert, and I have never seen it done, theoretically I see no reason why a double cardan CV joint can't be used with a slip yoke.

 

 

As I understand it (and I could be wrong), a CV joint has a certain amount of flex in it (two joints together instead of one). you just can't have that flex right next to the slip joint.

[carnuck]

Although I"m by no means an expert, and I have never seen it done, theoretically I see no reason why a double cardan CV joint can't be used with a slip yoke.

 

 

As I understand it (and I could be wrong), a CV joint has a certain amount of flex in it (two joints together instead of one). you just can't have that flex right next to the slip joint.

 

Or it will play crack the whip as it goes skip to my loo!