Vibrations ... The saga continues...

[jimynick]

Rob, this is not a Chevy. The oil pump is run by the intermediate shaft that is run by the cam. To spin the pump, without turning over the whole engine, you'll need to pull the dist. & intermediate shaft (the one you just got phased right) and if memory serves, use a long piece of hex rod (match size with the hex end on the intermediate shaft) and a 1/2" drill. While spinning the pump, manually turn the engine 90' after a minute, keep spinning and continue rotating the engine until you've gone around at least once. If you watch carefully when lifting the intermediate shaft, you'll see the orientation of the slot when it comes off the cam gear and if you're lucky, you can put it back in and sometimes get lucky enough for it to go back where it was. no guarantees as it has to mesh into the oil pumps hex socket first. 

[mopar12372]

you have to remove the oil pump gear to use the method i use . you could risk just turning the engine over without plugs in it until oil pressure is  up them light her up. yes its not a chevy but you can purchase an primeing rod from mopar and do it that way too. good luck with start up i hope everything goes well.

[IMNCARN82]

Got the rest of her put back together,just a few little things. Real close now.  Back down on all fours. Turning it over with no plugs isn't a bad idea,But I'll probably find the proper shaft. And I want someone else to check the ignition placement.  Pushing the clutch in while installing the trans. made all the difference. Thanx SD!!  Pretty soon it will be time to turn that key...   To me, This is as close to giving birth as I can get.  Thanx mopar12372 Thanx to ALL for the help and encouragement. If it doesn't vibe I'm not quite sure how I'll react. It's been such a long hard expensive road.

[ShelbyDogg]

Jimmynick.  I made my very 1st oil pump prime shaft in 1976 building my first 440.  Are you sure you aren't comenting on something without reading carefully first? I was helping him set the timing.

[sadil340]

Unfortunately I can't say yet that it was definitely the problem. I have not had the shaft re-balanced. The play was not in and out but up and down indicating that the part that slips into the tailshaft had worn down a bit. I hope to get things balanced soon and if the roads cooperate will report back.

Well it took awhile to get this sorted out but I finally have the driveline vibration solved. The initial problem was due to the slip yoke bing worn by .035 in. I installed the new yoke on the already balanced driveshaft but it still vibrated. I found a shop that could balance the shaft with the new yoke on it and he told me that he had to reinstall the yoke 180 degrees off and then it balanced fine. I've been putting up with this vibration for over 30 years! That must have been when the original yoke developed enough play to cause the problem. At that point the car had about 140,000 miles on it.

[IMNCARN82]

Just fired her up. No real problems. Gave it a few minutes...Went for a cruize.... IT'S EXACTLY LIKE IT WAS!!!
 OMG what am I gonna' do now?  I am in bad shape.  R/T

[ShelbyDogg]

Just fired her up. No real problems. Gave it a few minutes...Went for a cruize.... IT'S EXACTLY LIKE IT WAS!!!
 OMG what am I gonna' do now?  I am in bad shape.  R/T

Wow!    Does it vibrate sitting in neutral, bringing up the revs?  I think we all asked this question before.  I feel for you Robert!

[IMNCARN82]

yeah, just like before.Sitting,cruising,doesn't seem to really matter. I can't believe it.  In a state of shock still...  But very proud of myself at the same time. This thing fired immediately. Took a while for a lifter to quiet,But I'm impressed.    It's not as fast as the 340 though.     So...yeah...  *deep sigh*   I don't know what to do.  I really don't.          I'm at a bottom. And would like to really thank you guys. Just for everything...

[ShelbyDogg]

Let me loan you my factory 360 flywheel. You pay the heavy shipping both ways. If it works, send me another $50.

I have a feeling that the smaller flywheel doesn't exactly match the bigger one.  Or how about bolting on the bigger flywheel and bell housing just to start it up and rev it?  You don't have to have a clutch and tranny installed, just hold it up with a jack stand.

[IMNCARN82]

You have a 12" 360 flywheel?   How am I going to tell if it vibes with no trans. in it? 

[ShelbyDogg]

You have a 12" 360 flywheel?   How am I going to tell if it vibes with no trans. in it?

Measured from behind it is 12", front about 12-3/8",  130 teeth.    I thought tjat you said that it vibrates in neutral?  You don't need a clutch and trans on to start it up and rev it. 

[IMNCARN82]

The pistol grip rattles. It vibrates. It's difficult for me to tell without the trans. in. I need to find a small 360 flywheel around here. I'd try yours SD.  Yes,It vibrates in Neutral. It vibrates more the harder I rev it. Sitting still,rolling at speed.

[ShelbyDogg]

The pistol grip rattles. It vibrates. It's difficult for me to tell without the trans. in. I need to find a small 360 flywheel around here. I'd try yours SD.  Yes,It vibrates in Neutral. It vibrates more the harder I rev it. Sitting still,rolling at speed.

PM me your address. I'll stop by the post office and ask how much this would be to ship. It took me years to find a 360 flywheel. So, I'll be ready if you want to try mine.

[IMNCARN82]

What about a new flywheel with removable weights? Years!? To find a flywheel?! Well...I'll make a call and try.this guy has buildings of mopar parts. I'll pm you my info. But let me see what I can find. And I agree...It's got to be the balance.  What else could it be? 

[ShelbyDogg]

It's got to be the balance.  What else could it be? 

That is why you using the complete 360 with balancer and flywheel would have eliminated that part of the equation. I wouldn't have guessed that the flywheel  was a different size and the clutch wouldn't fit it.

Since you are now an expert at R&Ring the trans, you can try installing the big flywheel and big bell housing, without the clutch installed, throw on the tranny for the rear mount, install the starter and start it up.  Factory balanced engine and you can rev it up to see if the vibration is still there. It never vibrated in the truck, did it?

One thought crossed my mind though.  I've had my car for so long that I can feel a miss if one plug wire falls off. It doesn't pop or backfire but vibrates a little. Are you using the same plug wires from your 340 on the 360?