Re: 4 vs 5 frictions in a 904
[Re: hysteric]
#2579137
11/16/18 01:38 PM
11/16/18 01:38 PM
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Joined: Oct 2007
Posts: 472 Minnesota, USA
humpty
mopar
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mopar
Joined: Oct 2007
Posts: 472
Minnesota, USA
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It is good to see you are doing the rebuild yourself. It's not that difficult and you'll know what you have when you're done. Since you're in there I'd go for 5. I've had good luck with Alto Red fibers and Kolene steels. Like jbw123 noted - you can get different thickness fibers and steels to make room. I'd also check all tolerances since you didn't originally set this one up. Set everything on the tighter end of the specs. I'd purchase Carl Munroe's book: https://www.amazon.com/Torqueflite-727-Transmission-Handbook-HP1399/dp/1557883998. There's still lot's relevant information in there. If you're interested, I'll send you my 904 build notes for reference.
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Re: 4 vs 5 frictions in a 904
[Re: hysteric]
#2579170
11/16/18 02:38 PM
11/16/18 02:38 PM
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Joined: Dec 2005
Posts: 11,526 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,526
Fulton County, PA
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Rear clutch frictions are .063, and other than being thin, are interchangeable with the thicker front clutch plates. Steels are also available in .068 and .080. Snap rings also came in different thicknesses if you have an assortment of those. Cutting the pressure plate like that makes it a PIA to measure clearance and weakens it.. Use an uncut pressure plate or on the outside chance that you have to trim it some, trim the entire width. Use good hi-energy or blue rear clutch plates (12760), along with a mix of thick and thin steels to dial the clearance in. Measure and adjust clearances before oiling everything for assembly. At .012 per disc, that's .060 total clearance. You should be able to get very close to that just adjusting part thicknesses.
If the results don't match the theory, change the theory.
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Re: 4 vs 5 frictions in a 904
[Re: CMcAllister]
#2579218
11/16/18 04:39 PM
11/16/18 04:39 PM
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Joined: Jan 2003
Posts: 25,748 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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Rear clutch frictions are .063, and other than being thin, are interchangeable with the thicker front clutch plates. This was recently discussed; rear clutches are not intended to apply under power and are, therefore, different.
The INTERNET, the MISinformation superhighway
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Re: 4 vs 5 frictions in a 904
[Re: hysteric]
#2579245
11/16/18 05:33 PM
11/16/18 05:33 PM
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Joined: Dec 2005
Posts: 11,526 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,526
Fulton County, PA
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That was true of the OEM stuff. Not so much the present aftermarket pieces. We aren't worried about Grandma complaining about a harsh shift.
If the results don't match the theory, change the theory.
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Re: 4 vs 5 frictions in a 904
[Re: hysteric]
#2579353
11/16/18 10:49 PM
11/16/18 10:49 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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the better fibers are grooved (not waffled) and can be used in either clutch pack.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 4 vs 5 frictions in a 904
[Re: hysteric]
#2579428
11/17/18 02:51 AM
11/17/18 02:51 AM
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Joined: Dec 2009
Posts: 20,627 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,627
in a cattle trailer down by th...
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You can check the clearance with a dial indicator easy enough.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon! 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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