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Re: 904 loses top gear in 2500 mi
[Re: BeEtLeJuIcE !]
#2742180
02/12/20 09:23 AM
02/12/20 09:23 AM
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RWG75
Unregistered
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RWG75
Unregistered
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Did that myself one time. Wait, it was the tranny shop that screwed it up and I fixed it. Had a full rebuild, ran fine for a few thousand miles, 1 and 2 were fine, 3rd started to feel like it was slipping. Eventually 3rd felt entirely like neutral. Ripped it down, found wasted front clutches and steels. Kept looking and found the inner hub of the front drum gouged from a burr on the input shaft. It caused a leak between the valve body and the clutches that eventually got big enough that they didn't engage.
Don't hold me to how technically correct that is - it's been a lot of years since I've been inside a torque flight.
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Re: 904 loses top gear in 2500 mi
[Re: Tr jimi]
#2742225
02/12/20 11:59 AM
02/12/20 11:59 AM
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Joined: Dec 2009
Posts: 20,640 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: 20,640
in a cattle trailer down by th...
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It's really easy to cut or fold the outer lip seal on the piston of the front clutch drum. The rear drum goes together much easier. Have you pulled the piston out? Also check to be sure the inner lip seal protrudes from around the hub. Of course any wear where the seal rings ride in the drums or support would also be an area I would look at closely. The 904 should more than stand up to that HP and weight.
"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 conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: 904 loses top gear in 2500 mi
[Re: Guitar Jones]
#2742235
02/12/20 12:25 PM
02/12/20 12:25 PM
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Joined: Dec 2005
Posts: 11,579 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,579
Fulton County, PA
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Won't upshift out of 2nd or slips/freewheels once it shifts to high?
If the results don't match the theory, change the theory.
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