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I'llASK
New User
Jun 29, 2016, 7:09 PM
Post #1 of 8
(2031 views)
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44re drum into a 42re
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In the near future I'll be rebuilding my trans. Have always heard about swapping 44re internals into the 42re. Did a good bit of homework and see in the front and rear clutches there are the following differences besides the obvious number of frictions and steels. A.The front clutch drums are a different part number but bushings are the same,seals are the same. The differences that I could find in the front drum parts are ...There are two different springs listed,the 42re spring,which is the same as the 44re 4wd spring. And a different spring used for a 2WD 44RE. Which one would I use in swapping drums?
Also, are the two drums dimensionally the same? How is the greater number of frictions/steels in the 44re suited to the drum if all else is the same? Is it the spring?
B.The rear clutch drum has two differences that I could find...the rear clutch piston spring has different part numbers between the two trans. I assume this directly relates to the number of frictions being different. Would I use the 44re spring?
Also, in this case the frictions carry a different part number which I assume relate to being thinner to fit in the same space. Is this correct?
The intermediate gear train is identical except for the front planetary which carries a different part number. I have no idea what the difference is. Neither the 42re nor the 44re front planetary exist in a new state so I don't know if its an important point.
I have not delved into the OD yet. I happened into a brand new 44re 4WD valve body. Off hand can this be used in the 42re? Thanks for reading this long post!
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gsferraro
Veteran
Jun 30, 2016, 3:33 PM
Post #2 of 8
(2002 views)
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Re: 44re drum into a 42re
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Hello,
Question, when you refer to the rear clutch drum, are talking about the one with the input shaft? Gary
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I'llASK
New User
Jun 30, 2016, 5:44 PM
Post #3 of 8
(1996 views)
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Re: 44re drum into a 42re
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Yes. Mopar uses front drum in lieu of the direct drum terminology,I think.
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gsferraro
Veteran
Jul 1, 2016, 6:13 AM
Post #4 of 8
(1978 views)
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Re: 44re drum into a 42re
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Hello,
Ok basically the 42 and 44re drums are the same. The direct drum there is either early or late, the difference is either 2 bushings(early) or 1 bushing (late). The rear drum or input drum from like 1990 and up are basically the same, there may be some drums that take 3 clutches and some that take 4 clutches in the pack. The reart drum(input) uses a belville return spring on all drums
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I'llASK
New User
Jul 1, 2016, 3:18 PM
Post #5 of 8
(1972 views)
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Re: 44re drum into a 42re
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I concur. But should I use the spring that is recommended or listed for whatever drum I use whether for a 6 or V8? Do you know any differences between a 42re valve body and a 44re valve body?
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gsferraro
Veteran
Jul 2, 2016, 7:19 PM
Post #6 of 8
(1959 views)
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Re: 44re drum into a 42re
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Possible difference could be either a wide or narrow slot for the lock up. Yes use recommended spring. Gary
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I'llASK
New User
Jul 4, 2016, 3:45 AM
Post #7 of 8
(1945 views)
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Re: 44re drum into a 42re
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Thanks for all your time Gary. The only hang up I see is that in the FSM it states in bold print that the 42re drum is not interchangeable with the 44re drum. I wish I could find out why they say this.
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gsferraro
Veteran
Jul 4, 2016, 10:09 AM
Post #8 of 8
(1938 views)
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Re: 44re drum into a 42re
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Hello,
Maybe because of different amout of clutches, im actually not sure why either. Gary
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