Whatcan cause a 4L60e's transmission pump to consistently go out?
10-21-2011, 07:00 AM
#1
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Whatcan cause a 4L60e's transmission pump to consistently go out? This is the 2nd time the pump when put.. After the first 1 I changed the torque convertor and went smaller.. It ran fine until about a day ago.. I'm pretty sure it's the pump because I can hear the pieces rattling inside the trans.. Hes saying that he's going to open it up an check it out today.. Any ideas on what can be causing this problem? It had a shift kit inside it as well..
10-21-2011, 07:19 AM
#3
It could be a number of things. No way to say 100% without getting it out and apart. A quick way to tell if its the pump is to put a pressure gauge on the transmission. You could have also broken the input drum. Poor converter spacing will kill a pump every time. When you install a new torque converter you must ALWAYS check your pump engaugement depth. It is very simple to do. Here is a link with step by step instructions on installing a converter and checking for propper pump engaugement.
http://www.ls1truck.com/forums/power...r-spacing.html
http://www.ls1truck.com/forums/power...r-spacing.html
10-21-2011, 07:23 AM
#4
It could be a number of things. No way to say 100% without getting it out and apart. A quick way to tell if its the pump is to put a pressure gauge on the transmission. You could have also broken the input drum. Poor converter spacing will kill a pump every time. When you install a new torque converter you must ALWAYS check your pump engaugement depth. It is very simple to do. Here is a link with step by step instructions on installing a converter and checking for propper pump engaugement.
http://www.ls1truck.com/forums/power...r-spacing.html
http://www.ls1truck.com/forums/power...r-spacing.html
10-21-2011, 07:53 AM
#5
Pardon me for threadjacking a bit here- I'd like to hear some of the symptoms of a damaged pump and/or input drum...
My red car project has been stalled for a while due to distance between me and the car, soon to be cured. With the flexplate bolted up there is horrible vibration in forward gears and a lot, but not nearly as bad, vibration in reverse. I initially thought it was converter flutter and rotated the converter 120* but it's still pretty bad. When I put the trans back in the car everything looked and felt fine installing the converter. The spacing with the converter all the way back was right at 3/16".
The trans was a replacement the PO put in it about 800 miles before he roasted the engine. It's also a PWM trans in a 94 car so has its own issues associated with that. Before running a wire from D6 to pin U on the case connector and tuning like a 95 I want to know if the trans is trashed and I shouldn't bother. I have no idea what if any care was taken by the PO when installing this trans, what prep he did, etc. T56 all day long for me, autos are not my strong suit.
My red car project has been stalled for a while due to distance between me and the car, soon to be cured. With the flexplate bolted up there is horrible vibration in forward gears and a lot, but not nearly as bad, vibration in reverse. I initially thought it was converter flutter and rotated the converter 120* but it's still pretty bad. When I put the trans back in the car everything looked and felt fine installing the converter. The spacing with the converter all the way back was right at 3/16".
The trans was a replacement the PO put in it about 800 miles before he roasted the engine. It's also a PWM trans in a 94 car so has its own issues associated with that. Before running a wire from D6 to pin U on the case connector and tuning like a 95 I want to know if the trans is trashed and I shouldn't bother. I have no idea what if any care was taken by the PO when installing this trans, what prep he did, etc. T56 all day long for me, autos are not my strong suit.
10-21-2011, 08:06 AM
#6
Converter spacing is a good thing to check.
I would ask how thoroughly the tranny was gone through after the last failure.
You didn't tell us if the second failure was 2 days or 2 years.
Did you actually use someone known to be good WITH THIS TRANNY or did you just trust a local who said he could do it?
I would ask how thoroughly the tranny was gone through after the last failure.
You didn't tell us if the second failure was 2 days or 2 years.
Did you actually use someone known to be good WITH THIS TRANNY or did you just trust a local who said he could do it?
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10-21-2011, 04:47 PM
#8
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I currently have a vigilanti torque convertor and this 2nd pump was installed around the middle/end of august.. The 1st pump lasted about a week and had a had a different torque convertor..
