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Member
Posts: 39
| My Torque converter drains back into the trans pretty quickly
Assuming the torque converter is OK is there a valve or seal or something in either the
Valve body behind the front pump or in the main valve body
that is supposed to keep the oil in the torque converter from draining back into the trans
when the engine is not running
Any suggestions would by appreciated
Thanks Larry |
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Extreme Veteran
Posts: 537
Location: Upstate NY | There is a small valve body behind the front pump that has a sping steel double check valve. |
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Member
Posts: 39
| The one that looks like a flat, wide pair of Tweezers?
Is that what keeps the fluid in the T/C when the engine is not running |
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Board Moderator & Exner Expert 10K+
Posts: 13053
  
Location: Southern Sweden - Sturkö island | The tweezers is the rear and front oil pump check valve and does not affect the drainback.
All oil above the center of the torque converter will drain back in the sump.
Now, instead, what problem do you have with the drainback? Usually, the converter fills upp almost instantly by the front pump. |
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Expert
Posts: 3778
Location: NorCal |
I agree, nothing can prevent converter drainback but worn parts make it drain quicker. Will refill almost instantly upon engine start. |
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Member
Posts: 39
| After it sits for a couple days & I first start it & put in gear & it acts like it is still in neutral for up to 90 seconds
also sometimes it does this after only sitting a couple hours after driving it but not always
I have about 20,000 miles on the trans since rebuilt, about 3,000 miles ago i replaced the oil & the issue went away
But came back after about 2,000 on the new oil
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Expert 5K+
Posts: 8443
Location: Perth Australia | Start the car and let it idle for a while, then re check you oil
You might find that after it has re filled the converter, you trans is low
A common place for the oil to come out of is the shift cable
Relatively easy to fix with dual wall heat shrink (heat shrink with hot melt glue inside)
This allows the trans to over fill and run up the cable, but not end up all over the ground
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Member
Posts: 39
| Not a drop of oil on the outside anywhere, it is sealed up tight & the level is always right on the mark
Also I had done the shift cable heat shrink when I restored the car about 4 years ago
about an hour after i run it an turn it off the level on the dipstick rises about an inch & a half & the next morning it rises another 3 or 4 inches
i had to put rubber cork on the top of the dipstick, because after sitting for a couple days when i would start it oil would shoot out the top of the filler tube |
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Member
Posts: 39
| What about the O-Ring on the on the Drive Sleeve, does that have anything to do with keeping oil in the T/C after stop the engine
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Board Moderator & Exner Expert 10K+
Posts: 13053
Location: Southern Sweden - Sturkö island | There's something totally wrong here - the oil cannot rise above the filler neck if you dont have too much oil in the trans. Try to drain the transmission and the converter and measure the oil volume. Refer to the FSM for the correct capacity and refill the trans. Again, the converter will drain back, there's nothing you can do to avoid it - as John wrote, worn parts may speed up the drainback.
Now to your problem - in the best case, your oil level is too high and the mechanical parts whips in so much air in the oil so the pump starts to cavitate. All the air in the oil causes delay in engaging the gears.
In the worst case, the trans has an (or more) internal leakage, hence the pressure has problems to rise until the whole circuit is filled with oil. Never press in the R button first, go to 1'st or D and wait without revving the Engine, until the gear engages - then press R.
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Expert
Posts: 3778
Location: NorCal | Lucky Lar - 2015-04-19 5:59 PM
After it sits for a couple days & I first start it & put in gear & it acts like it is still in neutral for up to 90 seconds
also sometimes it does this after only sitting a couple hours after driving it but not always.
Sounds like some sort of internal leakage like worn/hardened seals in the front clutch; this is one of those cases where "miracle in a bottle" can come to the rescue. An additive like Trans-X or Lucas will soften the seals. |
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Member
Posts: 39
| The oil does not rise above the filler neck it just shoots up the for a second on initial starting |
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Board Moderator & Exner Expert 10K+
Posts: 13053
Location: Southern Sweden - Sturkö island | So, it seems like you have too much oil and air whipped into it......
Edited by wizard 2015-04-20 4:18 PM
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1958 Chrysler Torque Converter leaking back into the trans quickly
