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#4650560 - 01/29/18 07:09 PM Eaton Fuller Trans
chilson450 Offline


Registered: 03/30/16
Posts: 20
Loc: Northern Michigan
I am wanting to change the lube in a transmission I am working on. Its a FS-5601a 6 speed in a 1993 topkick. Has a PTO mounted on it. The manual shows different options on what to use to fill it. First it shows the CD50 synthetic transmission fluid. Also shows HDEO 40w and 50w and also GL1 90w gear lube. The synthetic Im sure would work well but is expensive for a truck not used much. The other options seem hard to find around here. I can find 30w and multigrade diesel oils. Do I need to just pay for the synthetic or does anyone know of other options for this tranny?
_________________________
2001 Chevrolet 2500hd 8.1/Allison
2011 Ford Explorer 3.5

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#4650625 - 01/29/18 08:46 PM Re: Eaton Fuller Trans [Re: chilson450]
Ramblejam Offline


Registered: 11/05/13
Posts: 3210
Loc: Kentucky
Will you be running it year-round, or seasonal?
How is it being used?

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#4650689 - 01/29/18 10:54 PM Re: Eaton Fuller Trans [Re: chilson450]
bubbatime Offline


Registered: 03/18/08
Posts: 5627
Loc: South Florida
Northern Michigan might call for a synthetic lube, no?
_________________________
17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
12 Suzuki S40 Rotella 15W40
10 Acura TSX 2.4 PZL Plat 5W30
06 GMC Sierra Nextgen 10W30



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#4650848 - 01/30/18 07:59 AM Re: Eaton Fuller Trans [Re: chilson450]
Chris142 Offline


Registered: 06/05/03
Posts: 16825
Loc: Deplorable in apple valley, ca
Synthetic will last the life of the truck.
_________________________
02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

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#4650865 - 01/30/18 08:14 AM Re: Eaton Fuller Trans [Re: chilson450]
46Harry Offline


Registered: 01/08/12
Posts: 409
Loc: hawthorne, Ca.
My recommendation would be the synthetic SAE 50 manual transmission lube. It will be more expensive, but it will also be the last time you should have to replace the lube.

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#4651037 - 01/30/18 11:08 AM Re: Eaton Fuller Trans [Re: chilson450]
chilson450 Offline


Registered: 03/30/16
Posts: 20
Loc: Northern Michigan
Yeah I think I will just get the synthetic for it and not worry about it again. Thanks everyone.
_________________________
2001 Chevrolet 2500hd 8.1/Allison
2011 Ford Explorer 3.5

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#4651935 - 01/31/18 10:12 AM Re: Eaton Fuller Trans [Re: chilson450]
CT8 Offline


Registered: 10/09/14
Posts: 10989
Loc: Idaho
Looking at new class8 trucks, the diffs and trannys have tags saying use syn oils . The engines run conventionals.
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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