trans leak
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,026
Likes: 4,174
From: US-PNW
Or perhaps the modulator seal or output shaft seal...
Place a piece of brown cardboard under the car to see where on the trans the drip is coming from. That should help narrow down what seal is in that location.
Place a piece of brown cardboard under the car to see where on the trans the drip is coming from. That should help narrow down what seal is in that location.
Le Mans Master
Joined: Jan 2001
Posts: 6,711
Likes: 1,371
If it's the tranny pan gasket you can try a Lube Locker gasket. I just ordered one yesterday for my 200-4R because I'm tired of the weepy cork & rubber units. Reports say they're wonderful so we'll see. If this doesn't work my next step will be to use THE RIGHT STUFF --- I personally know that stuff works great.
Anyway - take a peak; a bit much for one gasket but I'm tired of the leaks (I believe the 82 has a 700-R4):
https://www.lubelocker.com/products/...sion-llt-g4l60
Anyway - take a peak; a bit much for one gasket but I'm tired of the leaks (I believe the 82 has a 700-R4):
https://www.lubelocker.com/products/...sion-llt-g4l60
Le Mans Master
Joined: Dec 2005
Posts: 8,559
Likes: 938
From: Communist Colorado
Can you see where? Which side of the car? If its the passenger side, look at the kick down cable seal. Its kind of a PIA.... I did all my seals and that was the one that still leaked after doing all the others like you did.
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
^^^^^ This ^^^^^^
Most tranny leaks are full time issues.
First clue.
You stated the car sits for a couple weeks then drips. During storage periods, everything in the trans begins draining into the pan.
The dipstick tube "O" Ring becomes taxed to its limit on how much extra ATF it can hold back.
If you put the front end up on ramps, some of the ATF will flow to the rear of the pan. Remove dipstick, unbolt the dipstick tube. With a brand new "O" Ring in hand
and a o ring pick, you can swap-out the ring somewhat quickly without losing too much ATF.
As a extra precaution, I smeared a dab of Permatex Transmission RTV on the tube also.
Most tranny leaks are full time issues.
First clue.
You stated the car sits for a couple weeks then drips. During storage periods, everything in the trans begins draining into the pan.
The dipstick tube "O" Ring becomes taxed to its limit on how much extra ATF it can hold back.
If you put the front end up on ramps, some of the ATF will flow to the rear of the pan. Remove dipstick, unbolt the dipstick tube. With a brand new "O" Ring in hand
and a o ring pick, you can swap-out the ring somewhat quickly without losing too much ATF.
As a extra precaution, I smeared a dab of Permatex Transmission RTV on the tube also.
Burning Brakes
Joined: Jan 2001
Posts: 1,202
Likes: 435
From: Loir Valley Sarthe, France
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
I have changed the speedo drive seal in our '78, yet it still drips a little after the car has stood for a few weeks! I've got a selection of new O rings, but it's a pain to get to on ours, due to the configuration of the one-off exhaust, so I'm afraid I've lived with the leak!😱
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Drifting
Joined: Aug 2019
Posts: 1,508
Likes: 495
Case connector for the electronics can leak too, the dip stick tube was another one mentioned ... Torque converter drain back when it sits over fills the pan , loose pump bushing to converter hub allows it to leak faster but even with new bushings and converter they still bleed down
4th Gear
Joined: Mar 2024
Posts: 4
Likes: 0
Drivers side trans leak - '82 collectors edition maybe the speedo gear seal?
Can anyone advise what this leak would be caused by? '82 collector edition driver side trans leak. Can this be replaced with the transmission still in the car? Will the cross member support need to be removed?
Last edited by cbrunet97; Mar 6, 2024 at 11:26 AM. Reason: clarification on transmission removal
Drifting
Joined: Aug 2019
Posts: 1,508
Likes: 495
your picture is of the speedometer assembly , there are two seals in this unit plus the driven gear itself can wear a groove where the seal rides making it leak
Dip stick tube , case through connector and TV cable are the three seals you haven't replaced yet and they are common to leak after sitting a few weeks after the torque converter drains fluid back into the pan causing an over-full condition where the speedo assembly usually leaks after a drive cycle .... all of these items can be repaired without transmission removal
Dip stick tube , case through connector and TV cable are the three seals you haven't replaced yet and they are common to leak after sitting a few weeks after the torque converter drains fluid back into the pan causing an over-full condition where the speedo assembly usually leaks after a drive cycle .... all of these items can be repaired without transmission removal