i did a search and found nothin helpful on this topic i really need some help. ive got a toy transfer and a divorced 205 i made a joint in between the two that consists of two u joints like a driveshaft but i welded the yokes in the middle together so there is no shaft really. the problem im having is that in first and second gear when there is a lot of torque on everything i get a vibration when i get into higher gears as im rolling it doesnt do it any sugestions to help me out to get rid of my vibration. thanks

The only thing I could suggest is stouter mounts for all parts in the system...

Originally posted by toyletrider
i did a search and found nothin helpful on this topic i really need some help. ive got a toy transfer and a divorced 205 i made a joint in between the two that consists of two u joints like a driveshaft but i welded the yokes in the middle together so there is no shaft really. the problem im having is that in first and second gear when there is a lot of torque on everything i get a vibration when i get into higher gears as im rolling it doesnt do it any sugestions to help me out to get rid of my vibration. thanks

BEEN HERE DONE THAT!!!......1st. Did your "Hard mount" the case....means no bushings at the mounting positions. 2nd. What is the "Angle" on your "Intermediate" shaft?....the 1 hooking the 2 cases together. 3rd. I had to make "extra" braces to the Divorced case other than the factory "mounts".

its hands down an angle probelm! you have to have equal angles and a normal slip type short driveline in there along with angles of 5 degree's or less and it should quite down a bit-Jess

Originally posted by onetoncv
its hands down an angle probelm! you have to have equal angles and a normal slip type short driveline in there along with angles of 5 degree's or less and it should quite down a bit-Jess

This is because as the joints cycle they change the length of the shaft a little right? so with no slip at all the shaft is trying to move the cases around right?

Or am I WAY off base here?

TIA

i'm thinking of making better mounts for the married t-case first off. second my angle between the two is not that bad i would say its less than 10 degrees but i dont have a slip section inbetween the two is that gonna make a big difference the divorced t-cas is mounted solid

Trying to picture your setup- sounds like there is potential for trouble. might be way off, but don't U-joints have "phases" that have to be allowed for so they cancel each other out? Look at your driveshafts to see what I am talking about. Kinda hard to describe, but basically a U-joint does not produce even shaft velocity when operated at an angle. That's why CV joints (CONSTANT VELOCITY) are used in FWD applications.

Also, ANY flex in the mounts would play hell with this, as you don't have any allowance for thrust forces that I can picture.

ok thanks for the help i made the angle of the driveshaft between the two striaghter and that got rid of alot of the vibration i think next i will make stronger mounts does anyone know if i really need a slip section or is that just to get the shaft out ?:smokin:

Originally posted by toyletrider
ok thanks for the help i made the angle of the driveshaft between the two striaghter and that got rid of alot of the vibration i think next i will make stronger mounts does anyone know if i really need a slip section or is that just to get the shaft out ?:smokin:

Keep the slip joint in the shaft. It can be a PITA if it's a a tight fit to get out "solid"........:beer:

Interesting topic. I thought I was the only one who would be crazy enough to run a divorced T-case.

Here's my set-up, then I'll give you my thoughts.

Custom Land Rover 145 inch wheelbase crewcab pickup. Chev 350 to Advance Adapters O/D to SM465 (small driveline w/slipyoke) to Land Rover LT-230 t-case.

We made up super strong brackets to the frame that the other set of super strong brackets to the x-mission and t-case could bolt to. We used energy suspension tranny mounts in 4 different places (3 places on the t-case alone).

We placed 3 mounts in the t-case so that it wouldn't try to 'pivot' when the torque was applied to it. Maybe that is the problem with your setup. How many mounting points to the frame do you have?

The intermediate driveline does have a 6-inch slipyoke in it.

The t-case was mounted to have a 2 degree offset both in the y and x axis, to get the UJ's needle bearings to cycle and not wear any flat spots in them.

The thinking with our angle of off-set and the slipyokes and the energy suspension mounts is that there will inevitably be some flex between the engine and the rear driveline. If you don't have any way to let the engine move, even just a fraction of an inch, you're bound to get vibration problems.

I think the mounting problem could have a large impact on the vibration you are feeling, and I think the slipyoke would be more needed than figuring out if your UJ's are in or out of 'phase' with each other.

I can post pics of my setup if anyone is interested. Everything's hanging in the bare frame, so it's way easy to see.

Later,

Michael