Any advise?
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Any advise? I have a 08 chevy 1/2 ton Z71 4x4. 410 gears front and rear, Borla exhaust, JBL shorty headers, & a custom tune. recently put FLT level 6 4l60/70 trans, w/2800 stall Precision torque converter, with future power upgrades in mind. Everything professionally installed. 4000 after new trans and converter, the converter splines broke taking out the trans pump. contacted manufactures, no real answers as to why this happened. this is an everyday truck, so really don't want this to happen again. Have put factory tune back in. anyone know why this would happen.
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From: Ann Arbor, MI
You image link doesn't work. Please fix your post.
We would like to see if its the splines for the input shaft or the tabs for the pump.
If the splines, sounds like a defective converter or too much power.
If the pump tabs, likely an installation mistake that they tried to cover up.
We would like to see if its the splines for the input shaft or the tabs for the pump.
If the splines, sounds like a defective converter or too much power.
If the pump tabs, likely an installation mistake that they tried to cover up.
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From: Ann Arbor, MI
That is not the "spine"; that is a broken pump tab.
I don't have any personal experience with such a problem, but it looks suspiciously like the installer goofed and didn't have the converter fully installed before the trans was fully tightened to the engine. That generally breaks the pump rotor, but perhaps in your case it cracked the converter.
Perhaps Chris (Circle-D) or Frank (Performabuilt) can confirm or correct my suspicion. (Chuck from FLT doesn't participate that much.)
Those experts might have other possible scenarios, but I suspect they all result from install errors.
I don't have any personal experience with such a problem, but it looks suspiciously like the installer goofed and didn't have the converter fully installed before the trans was fully tightened to the engine. That generally breaks the pump rotor, but perhaps in your case it cracked the converter.
Perhaps Chris (Circle-D) or Frank (Performabuilt) can confirm or correct my suspicion. (Chuck from FLT doesn't participate that much.)
Those experts might have other possible scenarios, but I suspect they all result from install errors.
The 4L60 is very prone to a broken rotor. So it might be an install issue with to much pull out on the converter. But we have also seen the hub and or rotor break even when the install was perfect. My advice is a billet rotor and HD converter hub, that should eliminate any chance of a repeat failure.
Chris
Chris
