Re: Converter Lock-up

Posted by BH On 2012/1/4 21:52:03

Gator -

Fluid change and pan inspection was a good first step - neither terribly difficult nor expensive to do. Sounds like you didn't find anything too out of the ordinary.

Glad to hear that the manual valve is hitting all the detents when it should, just make sure you're in the right one when checking the base control linkage adjustment.

If the reverse band is too tight, that could cause drag in both Low and High range, but such a condition would run counter to your report of forward creep in neutral. Forward creep could be due to low band or high range clutch not being fully released when they should be, which could be a hydraulic or mechanical issue or even a combination of both.

Again, we're just guessing at this point. Safe bet would be to check both band adjustments per the shop manual - relatively easy to accomplish if you can work from under the the car SAFELY.

Then, pressure tests results will help identify or rule out hydraulic issues. The last few pages of "Trouble Shooting and Corrective Measures" in the Ultramatic section of the 1951-1954 Service Manual deal with out of line pressures and their possible causes.