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| Midnight85 | Question for PeteK | ||
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Guru
 
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Hi Pete, I've got an annoying problem, I have a Vette 700R4 in my El Camino. The car has developed a squeak which I believe is coming from the torque converter area. This is an assumption because anyone who has looked at it cannot pinpoint the exact location. It can be heard best under the hood and especially under the car. I won't go into everything I have already checked. What I need to know is if there is anything in the converter/front pump that can squeak? This squeak occurs whether the trans is in gear or not but only at a low rpm. It will squeak around 650-700 rpm but as soon as I raise the idle it stops. Everything is working exactly as it should and the oil level is perfect.
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Posted on: 2009/8/9 19:04
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HORSEPOWER! Some is good, more is better, too much is just right. |
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| PeteK | Re: Question for PeteK | ||
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I have seen this 2x. Once was a cracked pump rotor(700r4), and another time (on a Mopar) the converter hub was cracked. On the mopar, it was more of a chirp than a squeak.
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Posted on: 2009/8/9 20:53
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| Midnight85 | Re: Question for PeteK | ||
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I was afraid it was something nasty. IF I tear it down right away can the rest of the trans be saved? It seems to be just fine, however it does seem to be a bit soft shifting. Do you feel I can get by with just a rotor assembly or has the crack scored the pump? What do you think cracked the rotor? The engine has a slight cam in it so the idle is set about 800 rpm, will putting it in gear at this rpm do it?
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Posted on: 2009/8/9 23:28
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HORSEPOWER! Some is good, more is better, too much is just right. |
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| anesthes | Re: Question for PeteK | ||
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Pete,
Do you do anything with the 2004R transmissions? -- Joe |
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Posted on: 2009/8/9 23:39
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'79 Z28. 412 CID, NP 833 transmission, 3.73 10.5" rear end. |
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| PeteK | Re: Question for PeteK | ||
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Quote:
Joe, I did build a few, but never behind serious power. Although the internet talks them up, their planetaries are very small and look weak. |
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Posted on: 2009/8/10 0:32
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| PeteK | Re: Question for PeteK | ||
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Quote:
If the rotor or slide cracked, it likely scored up one of both of the pump halves. No worries though, a rebuildable pump core is about $30. Check endplay on the crankshaft while the trans is out. The rest of the trans may very well be fine. |
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Posted on: 2009/8/10 0:35
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"It was really on a pass until it came apart." "Yeah. They always are." |
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| Midnight85 | Re: Question for PeteK | ||
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Thanks Pete.
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Posted on: 2009/8/10 1:24
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HORSEPOWER! Some is good, more is better, too much is just right. |
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| anesthes | Re: Question for PeteK | ||
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Master Guru
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That's too bad. The gear ratio seem pretty decent, and the packaging is the same as the TH350 in my z28. I had heard they can handle decent power when built right, but not sure what decent power is.. I'd be looking at 500+ foot lbs. ?? -- Joe |
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Posted on: 2009/8/10 2:04
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