727 3rd Gear Drum Cracks

RVDodge

Newbie
Joined
Jul 18, 2023
Messages
1
Points
1
Make
Winniebago with 440 Dodge & 727 Transmission
Model
Winniebago Elandand 2
Year
1978
Miles
100,000
Engine
440
I am rebuilding a 727, I was just about to put in the springs, steels, frictions into the 3rd gear drum, until I noticed cracks around the edge of the drum.

The 727 will be going into an RV behind a 440.

Here are some pictures

Compress_20230718_112759_9862.jpgCompress_20230718_112758_8718.jpg


Is it still usable or should I replace it?
Thanks
 

JackC

wrench
Joined
Nov 14, 2006
Messages
1,799
Points
48
Location
Nothern California
It would work for some unknown period of time, (one day, one year) but I certainly wouldn't want to take the chance of future chunks coming off and destroying all the work you are doing. Sure could ruin a great vacation in the RV.
 

grcauto

wrench
Joined
May 29, 2014
Messages
1,394
Points
48
I'd replace any hard parts that have even the slightest cracks.
 

nickb2

Wrench. Diagnostic Tech.
Joined
Nov 22, 2008
Messages
12,912
Points
83
Location
St-Hyacinthe, Quebec, Canada
I am a diagnostic tech, not a trans tech, but for sure in a rv of this size with payload to follow, nope, would not put that back in. Just sayin.

I looked at the first pic, at least seven crack, and those are deeper than you can imagine, that drum is a goner. again, I am NOT a trans specialist, but if that was an engine part that even slighty looked like that, not going back in. IMHO. So you should treat tranny parts much like I would do when rebuildingf an engine. So to repeat what JackC said, how far do you want to go with known cracked part, and how much will you kick yourself in the arse when it fails knowing you knew?
 
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