Tranny problem?
Tranny problem? I got a 4l60e with about 93k miles on it. Lately my car has been driving weird. Sometimes it feels like it won't shift out of first until about 3000rpm or when I let off the throttle close to that. Also sometimes when I come to a complete stop and then press the gas I lose like all power and the car barely goes anywhere until it gets going. I got a 3600 revmax stall in it. Does it need to be retuned or any ideas of what I should check or fix?
Registered User
Joined: Mar 2012
Posts: 22
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From: Pollok, Texas
I am not a transmission tech but I did have to trouble shoot mine. Try starting off in 2nd. then shift to drive and see what it does. If it does ok then you have a problem in the low gear sprag and planetary area. JMO
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Sticky shift solenoids could give you those symptoms. They are cheap to buy and only require dropping the pan to replace. A trustworthy trans shop should be able to diagnose that for you. (Of course be careful of trans shops that want to rebuild your trans regardless of what is wrong.)
If you replace the soloenoids yourself, you should also replace the fluid and filter. The solenoids have a tiny internal filter that sometimes gets clogged from dirty fluid.
Here is what 01 Slomaro is referring to: when the shifter is in [1] or [2], the trans engages the "overrun clutch" which will make things feel "normal" even if the input sprag is shot. (But WOT will then quickly wear out the overrun clutch).
A worn input sprag could give you the feeling of no power, but IMHO would not affect the upshift. This assumes that at 3000 rpm the car is moving forward at its normal speed for that RPM. However, if the engine RPM is now always much higher for a given MPH, then you likely have either too little trans fluid, a worn input sprag or a badly slipping torque converter.
If you give us more symptoms and the relationship between RPM and MPH, we might be able to help you more.
If you replace the soloenoids yourself, you should also replace the fluid and filter. The solenoids have a tiny internal filter that sometimes gets clogged from dirty fluid.
Here is what 01 Slomaro is referring to: when the shifter is in [1] or [2], the trans engages the "overrun clutch" which will make things feel "normal" even if the input sprag is shot. (But WOT will then quickly wear out the overrun clutch).
A worn input sprag could give you the feeling of no power, but IMHO would not affect the upshift. This assumes that at 3000 rpm the car is moving forward at its normal speed for that RPM. However, if the engine RPM is now always much higher for a given MPH, then you likely have either too little trans fluid, a worn input sprag or a badly slipping torque converter.
If you give us more symptoms and the relationship between RPM and MPH, we might be able to help you more.
