I seem to have a leak on the rear of my AW70/71 transmission, specifically from the tranny gasget that is oriented perpendicular to the farthest - away from the engine -end of the pan. Where this gasget meets the pan lip seems to be the place that is leaking a dime sized drop every day. I can see no other sources for leak, I have replaced the pan gasget, the o-rings on the kickdown cable, speedo cable and in fact installed a new tranny pan.

Any thoughts?

TIA

Todd 244 DL 147K Vernon Green

i have a similar tranny leak on my bw55. but it looked like it was coming down from the oil cooler line (frontmost -> to radiator). but in the process i have decided to drop the pan and replace the gasket.

i have two questions.

1) can i use sealant instead of a cork gasket?

2) how do i remove the oil cooler line connectors from the tranny, the L shaped things?

hope your leak goes away. mine was fine for a while then it reappeared.

but i have taken the exhaust off and i am going to tackle this problem once and for all!

thanks,
chez

i have a similar tranny leak on my bw55. but it looked like it was coming down from the oil cooler line (frontmost -> to radiator). but in the process i have decided to drop the pan and replace the gasket.

i have two questions.

1) can i use sealant instead of a cork gasket?

2) how do i remove the oil cooler line connectors from the tranny, the L shaped things?

hope your leak goes away. mine was fine for a while then it reappeared.

but i have taken the exhaust off and i am going to tackle this problem once and for all!

thanks,
chez

i have a similar tranny leak on my bw55. but it looked like it was coming down from the oil cooler line (frontmost -> to radiator). but in the process i have decided to drop the pan and replace the gasket.

i have two questions.

1) can i use sealant instead of a cork gasket?

2) how do i remove the oil cooler line connectors from the tranny, the L shaped things?

hope your leak goes away. mine was fine for a while then it reappeared.

but i have taken the exhaust off and i am going to tackle this problem once and for all!

thanks,
chez

After installing the NEW TRANNY PAN I take it you installed a new gasket (maybe even a filter if you also did a tranny flush). It is not uncommon for recently installed gaskets (oil pan, tranny, valve cover) to leak. You are usually instructed to re-tighten the bolts to the pan after about a couple hundred miles of use. Everytime I have done work for any of my cars requiring gaskets I would always re-check the torque specs after a couple hundred miles. The last time this happened to me was on my friends 2000 Nissan Sentra. We replaced his oil pan gasket because of a leak but the new gasket started to leak about a week (500 miles) later. He brought the car over and we re-checked the torque specs. Sure enough about half of the bolts needed an extra nudge to get them tight. After this he has not seen another drop on his driveway.

Also make sure that as soon as you re-tighten or replace the gasket clean the area around the tranny (or any area affected by leaking fluids) so that you can monitor if any fluids are still falling and from where. Sometimes fluid may appear to be leaking from a certain point but it is only because during a drive the wind is throwing the fluid around that you get a false leaks at another location. Good Luck!

Sincerely,
--
Julio Meza

1979 264GL B27F 122K

Features Added:

BW55 To M46, Central Locking System, 25mm IPD Front Sway Bar, 81+ Dash W/ Oil & Ambient Temp Gauges In C, Oil Pressure, Volts

Next Project:

+Cruise Control

To follow up my tranny leak issues, is there a serviceable gasket just above the rear edge of the pan, oriented vertically to it? The bottom part is wet.

TIA

Todd

The only thing I can think of that would be in the area of where your leak is right now is possibly the rear seal where the driveshaft enters the tranny. A leak from there would trickle down the tranny housing when the vehicle is parked and make its way to the rear edge of the pan. Another possible leak could be the OD solenoid. It is on the drivers side of the tranny toward the rear a bit. If the o-ring leaks I would think the fluid would run down along the tanny pan edge till it gets to the very rear of the tranny pan where it bundles up and make a jump when there is enough to make a good size drop. Cleaning the tranny area and monitoring it as best as possible would be the way I would go about finding this tranny leak of yours. Good Luck!

Sincerely,
--
Julio Meza

1979 264GL B27F 122K

Features Added:

BW55 To M46, Central Locking System, 25mm IPD Front Sway Bar, 81+ Dash W/ Oil & Ambient Temp Gauges In C, Oil Pressure, Volts

Next Project:

+Cruise Control