CK5
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Diagnostic Now....Broke XJ shaft, melted rotor. Cause?

Actually, just got myself thinking. Seems like you were talking about your truck being kinda down on power and sucking gas just before this happened right? I wonder, if its possible, that you might have skipped A tooth or two initially (or a distributor tooth) which brought the truck into a weakened state only to then have it let go the rest of the way later on and thereby killing it the rest of the way? :thinking:


That is what i was thinking. Swear i was getting like 5mpg on the last few highway trips.
 
I hear that!!! Last time i had to back my suburban out of the garage (to sell the old motor) and push it back in, i strapped the front bumper of the blazer to rear bumper of the burb (Tight. Like ratchet strapped the two vehicles together) and backed it out and put it back in that way so that i didnt have to push the dang thing!


Of the 5 vehicles at my house.....nothing was worthy of pushing the burb. One FJ needed to be in the garage in front of the burb (and barely runs), the other is starved for fuel....and the other 2 vehicles were cars :doah:

Thats what you get for selling extra, running vehicles. Take note. :haha:
 
Also just for fun, here is a stripped dist gear. Again, you could see how it could still grab.

IMG_1418.jpg


EDIT: well that didnt work out...

here
http://www.google.com/imgres?hl=en&...tbnw=114&start=20&ndsp=27&ved=1t:429,r:0,s:20
 
More about dist gears,

worngear.jpg


http://www.performancedistributors.com/technical.htm

More,

http://theamcforum.com/forum/distributor-gear-stripped_topic30904.html

Been driving 69 AMX for a couple of months with a 1978 Long block 360 recently installed. I took the old distributor out of the 390 and put it in. All has been pretty fine, i.e. it has been fast and starts well and runs smoothly UNTIL I downshifted on the way home from 4th to 3rd at about 45 mph. The car backfired a bit then died. After towing the car home, I found I had spark and fuel so I put #1 at tdc and pulled the distributor cap. The rotor was not anywhere near #1. I pulled the distributor and the gear is very rough and worn down on several of the teeth (see picture).

IMG_1709sm.JPG


 
:eek:!...hate to see what the cam gear looks like on that AMC--probably just like the dizzy gear!.........................................................................................................I found the nylon govenor gear in my '81 G10 van's TH350 looked just like that,when I yanked the govenor out!..bought it for 500 bucks with a "blown transmission" back in 1990--after I replaced it with a used govenor,I drove it another 40,000 trouble free miles..................................................................................................Though I worked auto parts counters for 20+ years,I sold very few distributor gears--about the only vehicles that "ate" them seemed to be mopar slant sixes,they were nylon gears--but even those were not hot sellers....I was surprised to see how many gears Dorman now sells for lots of engines,I didn't think enough of them failed often enough,to have much demand for them.....
 
Can't that kind of gear damage happen when one gear is softer than the other. I don't exactly remember but it was something about a brass dist gear or cam gear getting stripped because the other gear was a much harder metal. I only mention this since you said the dist is new. Maybe it didn't like ur cam gear.

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suggestion

Hi,
I am new here but have been reading your thread and had a thought. I have seen many gm ignition rotors burn a pin hole thru the top right under the center contact usually causing backfiring and sputtering or just plain dead. usually will show spark at plugs but will cause arcing in the cap sending spark to random plugs at random times you can usually see this if you look at the very center of your rotor under the center spring steel contact if you see carbon there it needs replaced.
Hope this helps.

P.S. I second the catalytic converter would cause all of the issues you have described low power, poor fuel economy, eventually dying, as well as the backfiring excessive pressure in the exhaust has to go somewhere.
 
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Well, haven't had a chance to diagnose, but roommate came back from out of town, and we pushed it out of the driveway.

In the mean time, trying to turn 33x12.5's on dry pavement..i broke something in the steering.

Whats lets loose first? Column? Box? Whatever it is...the wheel is no longer turning the wheels....
 
Well, haven't had a chance to diagnose, but roommate came back from out of town, and we pushed it out of the driveway.

In the mean time, trying to turn 33x12.5's on dry pavement..i broke something in the steering.

Whats lets loose first? Column? Box? Whatever it is...the wheel is no longer turning the wheels....

My guess would be stripped steering shaft splines at the steering wheel.
 
My guess would be stripped steering shaft splines at the steering wheel.


As soon as i look at it for more than 2 seconds, i'll know if its below or above the ujoint shaft.

Never would have guessed i had enough leverage to break anything there...with one injured shoulder.
 
Even if the rag joint failed the shaft would still turn the steering box as it is set-up that way for safety reasons.
 
Even if the rag joint failed the shaft would still turn the steering box as it is set-up that way for safety reasons.


XJ shaft, and neither joint broke.

Think you are right with the wheel / upper shaft.

Doubt i broke the box....
 
Never would have guessed i had enough leverage to break anything there...with one injured shoulder.
Well, that can only mean one thing..............

You da MAN!!:waytogo:
 
Wow! First off, thats scary that you did that! And second, you got some bad luck man! Did you go get your new truck?
 
Even if the rag joint failed the shaft would still turn the steering box as it is set-up that way for safety reasons.


Well, 99% sure i broke the XJ shaft where the upper u joint assembly attaches to the middle part of the shaft.

Will confirm when i have a friend around tonight. Hard to turn the wheel and see the shaft at the same time.
 

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