Ok guys,
i know this has been ran down 5,000,000 times on here. But I'm just got towed 8 hrs home finally and with weather (west tennessee pms) have had no time or way to remove yet. So I just want to see if my theory may be correct.

Started up Saturday morning before Christmas and had a small noise that sounded like an exhaust leak. Figured ah WTH it's prolly an exhaust leak and cruised on into town. After about 25 mins of driving it was still there. No louder or quiter. So pulled in at AutoZone and shimmied under it and it sounded as it was coming from TC. I told myself this was it and I wasn't making it back from Knoxville. So I went ahead and bought me some shocks since mine were blowed continued to families house and replaced them. Later that night we went out to eat, exhaust leak still there and still pretty quiet. We left and headed back to families and as we turned into the neighborhood got to maybe 35-40 and vroooom!!! And the exhaust leak then sounded like a wrench moderatlmo tapping the bell housing!!! No gears.. looked at my fiance and said there it went. There went a freshly rebuilt trans 872 miles beyond warranty and 369 miles from home!!!

Anyhow got it towed back to families in the neighborhood and started trouble shooting!!! Check stupid stuff like it could really be it. Check fuses, made sure it had fluid, no leaks, restarted and still no pull anywhere. When you engage a gear you can hear it bog like it's about to make your a** hole out of your gut but nothing. So finally pulled the stick running and not running andafluid looks like it just came out of the quart.

1.
​​​So I marked the dipstick not running and fired her up and she drug down nearly 3/4-1". So im sure the pump is pumping.

2.
There is no discoloration, burnt smell, or debris in the fluid at the stick.

3.
I still have park and it free rolls like it normally would neutral.

So I'm to the point of just trying things when it dries before I just buy a new trans!! I know allot of what it could be. TC, pump, input shaft, output shaft, ect

But pump is working which tells me it's good and part of the TC is operating like it should. With that wouldn't the input shaft be good? And with park operational wouldn't the output shaft be ok?
I'm just curious in TC failure could cause this? Or maybe solenoid? Or what????

Pump pulls fluid down as it normally would in all gears. Sounds like it's about to engage and take off. I don't race and motor is stock! Any ideas or maybe someone has hopefully had this string of luck cause if I can manage to fix this newly rebuilt trans with a TC or solenoid ect I'd be ecstatic!!!!!

Thanks!!!

​​​​

 

Make sure the converter bolts did not come loose.

 

+1

This is easy to check and happens more than you would think

 

Sorry guys. I thought I put that in there. TC is tight .trans was just rebuilt had 1 year 12,000 mile warranty .Well it was just over the 12,000. But TC bolts are good. At first I thought it was broke flywheel but then I hit the idiot button and thought about how could it be with it still starting and tranny pump pumping and everything turning . Just hasn't made any sense to me. If the weather ever dries up imma pull it and establish the issue .

 

You can have a cracked flexplate and still have it start and run.
It will just make noise the whole time. Wouldn't cause a no-move

The pump can still work with a broken input shaft.

 

I know you can with it cracked. Was referring to it being broke broke. But with the input shaft broken wouldn't that stop the pump from working?

 

No. The converter hub drives the pump. Not the input shaft

 

I'm going to guess here. Forward clutch snap ring groove busted, which resulted in all the clutches frying in quick fashion, causing no propulsion whatsoever. Won't see any clutch material on the stick either, as it all settles at the bottom of the pan. Had this happen to me last year, different trans, but same principle.

 

Awesome! Thanks for quick reply .That sounds about right cause it was instant

 

That wouldn't affect reverse also though would it

 

Hmmm, good question. It shouldn't, at least on a th400, not sure about the 60e tbh. I guess I missed that part in the op.

 

If you have park but no gears at all you really have 3 options normally

pump
input shaft
internal converter failure

Tear it apart and reply back what the issue was

 

I'm typically one of the first to crack on the 4l60, but even I doubt it's the input shaft. If it broke under stock power, while just cruising around, I would be completely mystified.

 

Just wrote my friend gonna have him bring me the converter, slap some plywood on the wet cold ground and rip her out! Suppose to snow tomorrow so gonna try to knock it out today.

As soon as I find out I'll post. I'm really thinking input shaft but praying it's a simple TC swap and be done

 

If the converter broke, most likely all of those broken converter parts have been pump throughout the transmission by now. I would be very surprised if a simple converter change fixes this. I would drop the pan for an inspection before installing a converter. If it is not a broken flex plate or missing converter bolts you have broken hard parts in the transmission.

 

What modifications were done to the transmission when it was rebuilt?

letting go all of a sudden doesnt sound like clutches. wouldnt be a solonoid, you will manually have reverse and first. probably the input drum cracked and then the splines stripped in the drum. Did it originally shift hard enough to chirp the tires on the 1-2 shift at full throttle?

 

But the only hard parts that could he broken would be TC, pump, or input shaft to cause this type of failure . I'm about to pull pan and check everything before I pull it .Then pull and check further fluid looks brand new .No metal, discoloration or anything

 

A failed converter will push shrapnel and crap all through the cooler and the entire lube circuit (every area of the trans)
Metal typically sinks in the pan and you won't see it on the stick

converter failure is not totally uncommon, even at stock power level.

If you have a failed converter...you would be much braver (or riskier) than I if you installed the trans with only a new converter.

 

Well I'm going to say new trans is getting ordered. Something failed. Gonna pull it and tear into it to see exactly what it is

 

The good news is it wasn't any metal, shavings or anything in the pan. The filter however told a different story haha. Gonna be looking for a trans. Think I may go ahead and 80 swap it