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904 front servo spring #1807005
04/19/15 04:29 PM
04/19/15 04:29 PM
Joined: Nov 2005
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Tobbe Offline OP
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Tobbe  Offline OP
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have a 904 here that have been modded a long time ago ,the older front servo should it have 1 or 2 spring2 ?
this trans have the older style solid piston whit one small diameter spring.
this trans have a manual wb /cheeta and try to prevent overlap.

Re: 904 front servo spring [Re: Tobbe] #1807023
04/19/15 04:50 PM
04/19/15 04:50 PM
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Rio Linda, CA
John_Kunkel Offline
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Only one small diameter spring in the early front servo.


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Re: 904 front servo spring [Re: John_Kunkel] #1807058
04/19/15 05:43 PM
04/19/15 05:43 PM
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Tobbe Offline OP
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ok its been a long time working on the 904
is there a way to prevent overlap?

[img:left][/img]
[img:left][/img]

Last edited by Tobbe; 04/19/15 05:56 PM.
Re: 904 front servo spring [Re: Tobbe] #1807104
04/19/15 06:52 PM
04/19/15 06:52 PM
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Rio Linda, CA
John_Kunkel Offline
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A restrictor orifice in the front clutch passage in the case will help prevent excessive overlap. Drill & tap the case to 1/8"-27 pipe thread and then drill the orifice in a socket head pipe plug.


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Re: 904 front servo spring [Re: Tobbe] #1807421
04/20/15 01:30 AM
04/20/15 01:30 AM
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Tobbe Offline OP
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ok the orifice mod whas already done to this trans ,i dont like the restrikt flow mod ,i have the feeling this transmission would need all help it can get to hold up behind a moddded sb







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