Drive line angle

[Rubi03 jef]

hey ther everybody

i need some advice or names of places i can go or call to get the info i need

as some of you know ive been fighting with the steeler ships for my trany to be warrentied . now they finally got back to me and it goes in wednesday for the drive line angles to be measured   if they are in spec then there will warrenty it

so my question to you all is what is the drive line SPEC  on both front and rear drive shaft  on a STOCK   RUBICON     please if anyone has one please contact me ill even come measure the angles


thanks

[muffintop]

I cant tell ya what the factory drive angles are... but I can offer this...

I did the SYE and CV shaft and know, first hand, that this combination sets up very differently from a factory setup. So to recap the types... there is:

1) stock
2) stock lifted
3) stock lifted with transfer case drop kit
4) lifted with SYE/CV.

Some info on how to set up the different "types" can be found at:

http://www.4x4wire.com/tech/pinionangle/

Ya might wanna go in armed with this info... as they all setup different and have different angles that are acceptable depending on "type".

I know this is off the internet and there are alot of experts out there... but I followed this and it worked for me.

Good luck with the "steeler"ship.

KV

[Rookie]

It will NOT be in spec the angles will be way steeper than stock

But what i would be asking is what the hell do drive shaft angles have to do with the tranny

The drive shafts attach to the t-case so the angles no matter how steep or extreme should have nothing to do with a tranny warranty

No matter what the angle they will not increase or decrease the load applied to the tranny

Whats wrong with the tranny ?

[BlackYJ]

When I was researching about driveline angles I read that about 15 deg is the max for a standard single joint driveshaft, but the rubis can stock with a CV shaft and if my memory serves me correct, the CV shafts are good to about 25 deg.  I read that manufacturers recommend no more than 7 deg per joint.  I would call Pat's Driveline and get the actual specs

[Bnine]

It most likely wont be in spec. The dealer will likely use that to claim driveline vibration as a contributing factor to the failure.

Rubi's are slip yoke eliminted, but still use a normal 2 joint shaft.

[Rubi03 jef]

i havea 3 joint drive shaft on now. .no vibs .


its at 20% in the rear and 11% in the front .


ive tried to tilt the pinion angle up but i cant go any further . i have interference with shock and the plate the spring sitting on

so 20 % is the best it will get

the tranny wont stay in 4th it jumps out violently and now 3rd is starting to do the same

i figured they would try to use this as a reason for tranny issues but i still will fight for it .. i know the drive shafts are bolted to the T case so i have no idea why they are giving me such a hard time so im hoping this tech will just look at it and say yup its alllllllllllllllll good

but thats in a perfect world

and we all know its not perfect ..

ill let you all know by tomorrow nigth

[muffintop]

its at 20% in the rear and 11% in the front . Ive tried to tilt the pinion angle up but i cant go any further . i have interference with shock and the plate the spring sitting on

Weird... we both have the exact same lift kit (control arms & springs) and my drive shaft is 18 degrees and I got my pinion up to 16 degrees without any issues.

If you really only have 11 degrees on your drive shaft... I think you only need 9 degrees of pinion angle. But that 11 degrees sounds suspect. 20 degrees of pinon angle plus the "interference" you are describing suggests that you have way too much pinion angle... or maybe I am misunderstanding the posted info.

Unless there is a major difference in drive shaft length... we should pretty much have the same numbers? If ya wanna come by and compare Jeeps... PM me.

BTW... I don't think any of this has anything to do with your tranny problem. Hope your dealership passed the IQ test and came to that conclusion as well.

[Rubi03 jef]

no no no ..


heres the issues

tranny is messed up .. its not because of the lift or anythign .. its the tranny

the dealership doesnt want to warrenty it

so finally they said they would try to measure the drive line angles and see if its in spec then they will

so i was trying to get it as close to stock as possible but i cant get it any closer then 18% because if i tilt it any higher the pinion angle then the shocks touch the spring perch

so im stuck with 18 % which is fine but i dont knwo if its close enough for the dealer ship to warrenty it

[BlackYJ]

It is not the angle of the driveshaft you need to worry about, it is that you are still within spec on the allowable angles on the u-joints which you need to worry about, especially if you have a double cardan shaft as 18 degrees is nothing for a shaft like that.

If you have spicer or brand name joints check the website for allowable angles and bring that with you when you to do the dealership

[Evil-Jeep]

My suggestion would be to measure all angles including u joints, shafts, and any other drive-line component on your jeep. then contact the manufactures of each component and get the allowable min/max angles for each. have it all listed on a spreadsheet and take it in with you to the dealership.

2 other things to consider doing as well:
1) make sure you not only measure the angle at ride height, also measure the angles at full-droop and compress to show that you maintain the recommended range of angles.
2) send emails to the parts companies and ask "I am running ____ setup my angles are such, are there any known issues with your product causing issues with transmissions" I think most will agree that the answer will be a resounding "no" but at least if you take that with you it will show you have done your homework.

[Rubi03 jef]

thanks everyone .. i find out tomorrow