Transmission leak

[Bob Bauer 27]

Hi I have a sundstrand transmission that has a small leak on the bottom underneath in the middle and wondering if I can put a bottle of transmission stop leak for now until I can get to the problem.wondering if it would work and be safe for the transmission. 

[pfrederi 18,323]

Absolutely NOT!!  You will plug up any number of tiny orifices essential to operation.

Edited March 5, 2024 by pfrederi

[ebinmaine 70,696]

2 minutes ago, Bob Bauer said:

be safe for the transmission. 

 

I don't think I'd want anything other than proper fluid in there. 

 

 

4 minutes ago, Bob Bauer said:

sundstrand transmission that has a small leak on the bottom underneath in the middle

 

Only thing down there is the drain plug or the gasket between the case halves. 

 

Keep in mind the leaking fluid could be traveling from another location too.  

 

 

[pfrederi 18,323]

Clean the front of the transmission see if it is leaking down from the motion control

[pfrederi 18,323]

Put a drip pan under her keep her filled up and use her until you have time to properly run down the leak.  Leaks don't harm the hydro as long as you keep it filled...

[ebinmaine 70,696]

1 minute ago, pfrederi said:

Put a drip pan under her keep her filled up and use her until you have time to properly run down the leak.  Leaks don't harm the hydro as long as you keep it filled...

 

 

I'll second that.  

[Bob Bauer 27]

28 minutes ago, pfrederi said:

Absolutely NOT!!  You will plug up any number of tiny orifices essential to operation.

Ok thanks 

[Bob Bauer 27]

29 minutes ago, ebinmaine said:

 

I don't think I'd want anything other than proper fluid in there. 

 

 

 

Only thing down there is the drain plug or the gasket between the case halves. 

 

Keep in mind the leaking fluid could be traveling from another location too.  

 

 

Thanks 

[Bob Bauer 27]

19 minutes ago, ebinmaine said:

 

 

I'll second that.  

Thanks 

[Bob Bauer 27]

19 minutes ago, ebinmaine said:

 

 

I'll second that.  

Thanks 

[kpinnc 13,717]

Sundstrands that actually have a leak tend to do so at either the axle seal(s), or at the motion control lever. Axle seal leaks tend to travel to the lowest point before dripping, which makes it appear to leak at the gasket or towards the lowest part of the middle.

 

Check fluid before and after each use, just to verify how much is lost. Never use the tranny if low in fluid. If the loss is minimal, just do as has been suggested and fix when you can.