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Eaton Fuller Trans #4650560
01/29/18 08:09 PM
01/29/18 08:09 PM
Joined: Mar 2016
Posts: 20
Northern Michigan
chilson450 Offline OP
chilson450  Offline OP
Joined: Mar 2016
Posts: 20
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
Re: Eaton Fuller Trans [Re: chilson450] #4650625
01/29/18 09:46 PM
01/29/18 09:46 PM
Joined: Nov 2013
Posts: 3,212
Kentucky
Ramblejam Offline
Ramblejam  Offline
Joined: Nov 2013
Posts: 3,212
Kentucky
Will you be running it year-round, or seasonal?
How is it being used?

Re: Eaton Fuller Trans [Re: chilson450] #4650689
01/29/18 11:54 PM
01/29/18 11:54 PM
Joined: Mar 2008
Posts: 5,841
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,841
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


Re: Eaton Fuller Trans [Re: chilson450] #4650848
01/30/18 08:59 AM
01/30/18 08:59 AM
Joined: Jun 2003
Posts: 17,370
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,370
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
Re: Eaton Fuller Trans [Re: chilson450] #4650865
01/30/18 09:14 AM
01/30/18 09:14 AM
Joined: Jan 2012
Posts: 414
hawthorne, Ca.
46Harry Offline
46Harry  Offline
Joined: Jan 2012
Posts: 414
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.

Re: Eaton Fuller Trans [Re: chilson450] #4651037
01/30/18 12:08 PM
01/30/18 12:08 PM
Joined: Mar 2016
Posts: 20
Northern Michigan
chilson450 Offline OP
chilson450  Offline OP
Joined: Mar 2016
Posts: 20
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
Re: Eaton Fuller Trans [Re: chilson450] #4651935
01/31/18 11:12 AM
01/31/18 11:12 AM
Joined: Oct 2014
Posts: 11,857
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,857
Idaho
Looking at new class8 trucks, the diffs and trannys have tags saying use syn oils . The engines run conventionals.


2015 Ford F150 2.7
2018 Ford F350 6.2

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