| Author | Message | ||
| george bruton (Tazman632000)
Registered Member Username: Tazman632000 Post Number: 70 Registered: 2-2007 Posted From: 65.184.236.52 Rating: N/A |
during the engine swap im doing i took the drive shaft apart at the slip joint can someone tell me how to align u joint holders? are suppose they to go back to in a staight line or 90 degress from each other. the service manual say look for alignment marks i cant find them where are they located? | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 768 Registered: 12-2000 Posted From: 76.3.173.51  Rating: N/A |
Set the driveshaft on a workbench so that the 4 U joint cups are exacly straight up and down and straight cross wise. Install the slip joint so that this U joint is exactly the same as the drive shaft U joint. This is referred to as "being in phase" anything else is "out of phase" and will result in a vibration and greatly reduced U joint life. Jack | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 167 Registered: 3-2006 Posted From: 209.50.73.101 Rating: N/A |
George The marks are where the slip joint and drive shaft come together. The U joints are exactly 90 degrees apart from each other. Hope this helps you. Bill | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 168 Registered: 3-2006 Posted From: 209.50.73.101 Rating: N/A |
Jack Are you saying the U joints are in line with each other? I checked mine and the alignment marks make them 90 degrees apart. I have had mine in for over 20 years and no problem. Bill | ||
| Jack Conrad (Jackconrad)
Registered Member Username: Jackconrad Post Number: 770 Registered: 12-2000 Posted From: 76.3.173.51 Rating: N/A |
You are correct. I had not had my morning coffee before I started typing. Note to self: Do not type until AFTER morning coffee. Jack | ||
| george bruton (Tazman632000)
Registered Member Username: Tazman632000 Post Number: 72 Registered: 2-2007 Posted From: 65.184.236.52 Rating: N/A |
i found the alignment marks on mine the trunions are in line with each other on my shaft | ||
| Tom Yaegle (Tom_5c)
Registered Member Username: Tom_5c Post Number: 16 Registered: 1-2008 Posted From: 71.169.118.50 Rating: N/A |
You guys never had a 5C drive shaft apart. They only go together 1 way and are not in phase. Tom Y | ||
| JJ Woden (Jj_woden)
Registered Member Username: Jj_woden Post Number: 40 Registered: 10-2006 Posted From: 216.161.223.60 Rating: N/A |
For all intents and purposes, u-joints need to be in phase. If they are not indexed by the manufacturer with a blank spline or as Tom Y indicates, you would line up the yokes. A shaft with a u-joint speeds up and slows down twice every revolution, more dramatically as the angle increases. By phasing the yokes with each other, and with similar angles, the harmonic velocities cancel each other. Seems strange to deviate from this lesson in physics, but you have to follow manufacturer specs. | ||
| JR Lynch (Njt5047)
Registered Member Username: Njt5047 Post Number: 254 Registered: 7-2006 Posted From: 69.132.233.230 Rating: N/A |
The driveshaft yokes on an MC9 are not assembled 90 degrees apart. The driveshaft yokes are assembled on the same plane. The arrows will line it up phased together. Look for the markings on the spline and sleeve and go by those. Phasing the yokes 90 degrees is going to get expensive, if not dangerous. Be sure an use new fasteners and locks on your flanges...and trunions if you had them apart. JR |