Jim Grant's Tech Tips
‘86 Ford Aerostar, Leaking Transmission
Q: I recently replaced the transmission in my ‘86 Ford Aerostar with a used one. We drove it for about 50 miles and then the front seal, I believe, started leakingand all the fluid came out. I put a new seal in it along with new filter andfluid when I installed it. I took it back out to find no apparent problem withthe new seal. I put air pressure on the torque converter to see if the fluidmay be leaking from a seam, with no evidence of a leak. What should I do as anext step? Install another seal? Install a new torque converter? …
- Larry Wagner
A: You’ll want to be looking closely at that transmission. I’m sure you have better things to do than installing and removing the transmission trying to chase down an oil leak. I would suggest looking closely at the pump housing of the transmission. I’ve seen the housing crack and the gasket and seal for the housing leak as well. The best part of those types of leaks? They don’t show up until the transmission is operating and there is oil pressure. If you’ve installed the front transmission seal correctly and cannot find a problem with the torque converter then you should be looking at the front pump housing. If you find a problem with the housing I would suggest returning the transmission for another.