Author Topic: Dead transmission oil pump?  (Read 995 times)

Offline Ornamental

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Dead transmission oil pump?
« on: August 06, 2009 - 01:06:36 PM »
The transmission went south today. Due to some problems with engine stopping in idle, I did take it from drive to neutral a few times while still creeping forward.

I heard a few CLUNK noises (Not exactly,kind of hard to describe), and a noise like a box of nuts and washers were shaken.
As the engine and tranny got hotter, the performance dropped.  It stopped to swap between gears, at the last little bit home it seemed to be stuck in second. This was accompanied with a wailing noise from the tranny.

When at home, I let it sit for a while.  A few hours later, I checked the trannys oil level while idling, oil up to the full mark. Decided to see how things were then, and took the Chally out for a little stroll in the neighbourhood. At first, it seemed to be back to normal, but it didn't take long before it was hot again, and a noise like a rod were dropped from the suspension and grinding against the asphalt came. Stopped immediately, looked for loose rods, all good. Moved a little more, and the noise were gone. But the third gear was out again.


Since it seems to get worse as it heats, could it be oil pump that's died and these problems are related to the lack of cooling?
Also, the scary noises, could that be from a messed up pump?

How hard is it to swap the pump?
« Last Edit: August 06, 2009 - 01:13:59 PM by Ornamental »
Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

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Offline miketyler

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Re: Dead transmission oil pump?
« Reply #1 on: August 06, 2009 - 02:02:56 PM »
I dont know but I was quoted a really cheap price from a reputable trans company to rebuild my trans as a bench job.
72' Cuda restomod
70 Mustang Mach 1
07' Toyota Tacoma Prerunner Dbl cab in Speedway Blue!
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Offline Ornamental

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Re: Dead transmission oil pump?
« Reply #2 on: August 06, 2009 - 02:06:26 PM »
The tranny is definetively getting a total rebuild, regardless of this problem being just the pump or not.
But there's no time left for that this year, I'm about to be away from home until december, and must store the Chally in two days from now.
Just hoping that it can be driveable for the afternoon by replacing the pump in the morning.
Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

-There are two kinds of pedestrians: The quick and the dead.

***Per Arne***

Offline quagmire

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Re: Dead transmission oil pump?
« Reply #3 on: August 06, 2009 - 02:21:55 PM »
The pump is always spinning when the engine is running, does it do it all of the time?  A crude check would be to see if the fluid level drops when running in neutral compared to when the car is off.  It will at least rule out a total failure, but it could obviously still be weak or damaged.

Offline Ornamental

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Re: Dead transmission oil pump?
« Reply #4 on: August 06, 2009 - 04:06:08 PM »
When running, the oil level is at the Full mark. When off, it's around 1/2" higher.

Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

-There are two kinds of pedestrians: The quick and the dead.

***Per Arne***

Offline quagmire

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Re: Dead transmission oil pump?
« Reply #5 on: August 06, 2009 - 04:28:00 PM »
When exactly does it make the death noises?  Is there any chance the converter bolts are loose?  They will sound like rods getting ready to come through the block, it's scary sounding!  That wont explain the loss of third, but neither would a bad pump.  If the pump were bad, all gears should be gone.

Offline Ornamental

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Re: Dead transmission oil pump?
« Reply #6 on: August 06, 2009 - 04:49:21 PM »
From memory, it took a few minutes the second run.
I went less than a mile downhill, in a residential area with a few stops for crossing traffic.
I did step a little on it on a main road in the area, no noises from Hell to be heard.
Took it easier further downhill, had to wait for a traffic light, when I then hit the gas again, not very hard, just to get moving, and then some more to speed up, the screeching noises came. Didn't shift after that. Also, it felt like the car was braked, felt sluggish when accellerating. The accelleration when cold felt as usual when cold, not meaning I stomped it while cold, just regular careful driving until cold, but the power transfer felt normal
Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

-There are two kinds of pedestrians: The quick and the dead.

***Per Arne***

Offline quagmire

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Re: Dead transmission oil pump?
« Reply #7 on: August 06, 2009 - 05:13:48 PM »
I doubt its a pump problem.  I'd lean more towards an internal mechanical trans or torque converter problem.  If it were me I'd drop the pan and valvebody and look for debris or anything out of place before yanking the trans out.  Also check those converter bolts.  Normally I'd start with hydraulic pressure tests, but that noise sounds like a mechanical problem to me.  Still not a bad idea to do them though.

Offline Ornamental

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Re: Dead transmission oil pump?
« Reply #8 on: August 06, 2009 - 05:55:55 PM »
Seems like it's not a easy fix, but I had the feeling it wasn't the whole time.
The car will go into storage tomorrow, going away until december at sunday, so the tranny will have to wait until spring then. I'm prepared for a total rebuild.


Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

-There are two kinds of pedestrians: The quick and the dead.

***Per Arne***

Offline miketyler

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Re: Dead transmission oil pump?
« Reply #9 on: August 06, 2009 - 09:52:37 PM »
Where is the TacTransman? This is his area of expertise
72' Cuda restomod
70 Mustang Mach 1
07' Toyota Tacoma Prerunner Dbl cab in Speedway Blue!
01' Honda 1100 Shadow Sabre
96' Seadoo Challenger

Offline tactransman

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Re: Dead transmission oil pump?
« Reply #10 on: August 07, 2009 - 08:35:42 PM »
It sounds like the torque converter went out. Drop the pan when you are ready to work on it and it will probably be easy to figure out (metal)  :faint:
Terry-tactransman 
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Union, Mo.
Give a man a fish and he eats for a day,teach him to fish and he eats for a lifetime.

Offline Ornamental

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Re: Dead transmission oil pump?
« Reply #11 on: August 08, 2009 - 05:21:08 AM »
Thank you tactransman!

Hope it's just the converter, it's meant to be replaced anyway.

Panther Pink '72 Challenger Rallye.
Grey '70 Challenger R/T

-There are two kinds of pedestrians: The quick and the dead.

***Per Arne***