Pinion Angle?

[98 SNAKE EATER]

OK, here's the twist on the trans mount

Comparing the rubber mount, you can tell the current angle iron mount is shorter.

Gunna install the rubber mount and re-check the angle.

 

[RustyRatRod]

Your pinion angle is a little steep, IMO.

 

[69roadr]

Thanks for all the info, guys

Here's a little video showing where I'm at under load (4:15 goes from a dig)


http://www.youtube.com/watch?v=xlBh3DgIaMg



I'll get her back on the lift and re-check all angles.

man, never thought i would be so enthralled at looking at the underpinnings of a car in motion. that was really cool btw, it looked as if pass. side wheel had a slight wobble?

 

[5.7 hemi]

Put the rubber mount in and let us know how the angle is.

 

[98 SNAKE EATER]

man, never thought i would be so enthralled at looking at the underpinnings of a car in motion. that was really cool btw, it looked as if pass. side wheel had a slight wobble?

Yes, the right rear tire has a bunched tube.

I dead hooked a little while back running 10psi and spun the tire on the rim.

Haven't bothered to fix it as the tread is low, so I figured I'd just order new tires and be done with it.

On the day I was gunna place my order, I munched the ring, so it got put on hold lol

Put the rubber mount in and let us know how the angle is.

I installed the rubber mount, but wasn't able to get a reading as all of my flat lifts are occupied with work.

That being said, I took her out for a test drive and she's never been smoother :hello2:

No bad vibes on or off throttle up to 60mph

Haven't gone above 60 or more than half throttle as I'm still breaking in the new gears, but man what a difference :headbang:

I did notice a little howling/rubbing noise while under load through each gear, so I brought her back and found the drive shaft was rubbing against the loop

 

[98 SNAKE EATER]

OK, a little update....

After installing the new trans mount on Monday, I finally got her back on a flat lift today and measured -1* on the yoke, -1* on the DS and +1.5* on the pinion

As is, she's never been smoother or quieter, so I'm thinking about leaving her as is (I tell you, she's like a new car!!)

That being said, I have yet to really give her the beans (no more than 1/2 throttle) since I'm breaking in new gears, so I'm not sure how she'll react at WOT, but so far, so smooth

 

[5.7 hemi]

Sounds like ya got the problem fixed, thats cool!!! Now for the driveline, just use a ball peen hammer and you'll be fine, lol!!!!

 

[98 SNAKE EATER]

Now for the driveline, just use a ball peen hammer and you'll be fine, lol!!!!

Fixed

I pulled the DS, swiped a small jack from the trunk of some import rental in my shop, then put some heat on the right side of the loop before cranking it out.

Black bombed it, went for a spin and no more rubbing

 

[69roadr]

lets get that camera back under there and get on it a bit! i really like seein that stuff

 

[98 SNAKE EATER]

lets get that camera back under there and get on it a bit! i really like seein that stuff

OK, here's another one for'ya :yes:

http://www.youtube.com/watch?v=o_SMZMKFEAQ

After completing the break in on the new gears, I was finally able to give her the beans, but now I notice some vibration around 65-70 under hard acceleration and when I'm on and off of the gas

 

[Supershafts]

Under hard accel from 65/70 or hard accel and when you get to 65/70 you have a vibe.... if it's the latter as i suspect it is, your shaft needs better balancing

 

[98 SNAKE EATER]

Under hard accel from 65/70 or hard accel and when you get to 65/70 you have a vibe.... if it's the latter as i suspect it is, your shaft needs better balancing

The DS was balanced less than 2 months ago, but I guess it could've been tweaked again when I munched the ring gear a few weeks back :thinker:

 

[Supershafts]

You pull onto a street that has enough room to go from 0 to 100, you launch the car under full load from 0 to 100 mph.

1. any vibes during 0 to 40 ?
2. any vibes during 40 to 60?
3. any vibes during 60 to 80?
4. any vibes during 80 to 100?


If yes at 3 and 4 did they get more violent nearer to 100 mph ?
Under total decel (coasting down from 100 to 0) any vibrations during the same 4 areas ? or just the last 2

If yes at 1 of the 4 choices but it drove thru and went away the shaft needs to be balanced better

 

[98 SNAKE EATER]

You pull onto a street that has enough room to go from 0 to 100, you launch the car under full load from 0 to 100 mph.

1. any vibes during 0 to 40 ?
2. any vibes during 40 to 60?
3. any vibes during 60 to 80?
4. any vibes during 80 to 100?


If yes at 3 and 4 did they get more violent nearer to 100 mph ?
Under total decel (coasting down from 100 to 0) any vibrations during the same 4 areas ? or just the last 2

If yes at 1 of the 4 choices but it drove thru and went away the shaft needs to be balanced better

I'll have to switch back to the Mickeys in order to go WOT (these redlines don't hook for squat)

 

[rrTor-Red]

This is a confusing subject to me and I hope I can get it cleared up in my head. I'm going to be installing my drive train soon in my car and have either seen a subject like this and hense, making me confused. Here is what is confusing to me: How can you adjust the pinion angle on the axle when the spring perch rests on the pins of the rear springs? To me, you can't cause the pins help hold the rear in place. No, I've never removed a whole drive line before. So hopefully, I can get my head clear, with the help of members here, before installing my drive train components. Thanks

 

[rrTor-Red]

BTW Snake eater...WOW, thanks for the video!

 

[98 SNAKE EATER]

OK, back to the top with this thread...


A few weeks ago, I found out that most of my bad vibes were actually due to loose converter bolts :icon_pale:

Overhauled the tranny and most of the vibes were gone except for a little around 75-80mph

Then yesterday, I installed a pair of helper leafs to bring the rear end up about 1.5"

I noticed the vibe had shifted up to about 95mph, making the daily commute much more tolerable :glasses2:

I just got her on my flat lift for new pinion readings and this is what I came up with....


-1* on the trans
-1* on the drive shaft
+2* on the pinion


Suggestions on where to go from here?

 

[monaco66coupe]

Possibly short yoke? My' 69front yoke is in farther than shown in your picture sitting level. Mine is not a race car, nor set up to be, just a suggestion.
I have several shafts, and the front yokes aren't all the same length, even though they fit the 727, and they are a B body.

 

[98 SNAKE EATER]

Possibly short yoke? My' 69front yoke is in farther than shown in your picture sitting level. Mine is not a race car, nor set up to be, just a suggestion.
I have several shafts, and the front yokes aren't all the same length, even though they fit the 727, and they are a B body.

What's the length of the correct yoke?

I'll measure it the next time I have her up in the air

 

[tallhair]

- - - Updated - - -