Re: Checking transmission fluid

Posted by BH On 2011/9/20 11:54:48

HH56 -

The last 3-4 pages are peppered with ideas. It's a bit hard to follow where things were going, except that 55-56 pan probably won't work and its dipstick is on the wrong side. Then, there was some doubt as to use of the 54 CS pan, and I had expressed concern about lack of supply of related parts.

IIRC, GM type seal mentioned in one of those earlier posts is fitted to a hole through the casting of the THM case, which I bet is substantially thicker than the Ultra's cap. So, I'm not sure if that would work with the cap, and I doubt if many would want to drill a hole in their cast-iron Ultramatic.

Yet, that's what got me started with my last notion. What keeps the dipstick tube in the GM application from coming back out of that seal is the tube bracket that bolts to the engine. So, I figured that would work, as well with a rigid tube solidly mounted to a new, replacement cap for the Ultra. Then, remove one bolt and the tube and cap assembly come out.

However, I have no hands-on experience with these cars, and can't be sure of every detail that we might be up against - just brainstorming.

I'll leave it up to the hands-on owners of vehicles with the original Ultramatic to follow through, now.