Re: Twin Ultramatic Transmission oil pan bolts

Posted by Leeedy On 2023/4/11 11:16:18
Quote:

jgrohn wrote:
Hello,
I have a 1956 Patrician. I had the transmission oil pan gasket replaced because it was leaking, however the leak continues. The mechanic said that someone has over tightened the bolts, so at least some of them are stripped, and no longer hold. He also said that oil was coming out directly from under the bolts.

It sounds like I will need to retap the bolt holes, but before doing that I was thinking that maybe there is some thread left farther in the bolt hole. Any chance that longer bolts would be able to hold the transmission oil plan in place? I do not have access to the car right now, so I am not able to access the bolts themselves. Does anyone know what the specs are for the bolts that come from the factory?

Thanks!
John


Over the many years I have owned and worked on my V-8 Packards, I have encountered many similar instances. Most of the time people treat the 1956 aluminum transmission as if it is a 1955 transmission case. Result is sometimes the aluminum threads strip out.

I had a friend who once did this swearing he used torque specs right out of the "Packard Shop Manual." But that manual turned out to be 1955 with no 1956 info included. In the end, every joining bolt around the bell housing going into the main body was stripped to the point of useless.

Get yourself some Heli-coil repair kits, use 1956 torque specs and you should be back on the road.


This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=255769