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 Post subject: Manual transmission gear oil reccomendation?
PostPosted: Sun Sep 16, 2012 3:32 pm 
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Joined: Sun Dec 26, 2010 11:42 am
Posts: 564
Location: Florida
I know most of you run slushboxes for consistency, but what do the guys with a a "man pedal" use for gear oil? I have yet to fill my Muncie yet, looking for advice.

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1972 Chevelle SS 454 4 speed
1969 Malibu 2dr hardtop L48/4 speed -> 427 L72
1968 Malibu 2dr hardtop restomod
1972 Monte Carlo

Yes, I have an addiction.


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 Post subject: Re: Manual transmission gear oil reccomendation?
PostPosted: Sun Sep 16, 2012 9:51 pm 
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Joined: Fri May 22, 2009 12:36 pm
Posts: 808
Location: Westbury, NY
Most recommend 80-90 weight. Do not use synthetics. Not good with the syncro


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 Post subject: Re: Manual transmission gear oil reccomendation?
PostPosted: Tue Sep 18, 2012 7:51 pm 
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Joined: Sun Dec 26, 2010 11:42 am
Posts: 564
Location: Florida
Any preference on brand?

_________________
1972 Chevelle SS 454 4 speed
1969 Malibu 2dr hardtop L48/4 speed -> 427 L72
1968 Malibu 2dr hardtop restomod
1972 Monte Carlo

Yes, I have an addiction.


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 Post subject: Re: Manual transmission gear oil reccomendation?
PostPosted: Wed Sep 19, 2012 10:30 am 
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Joined: Sun Nov 01, 2009 7:49 pm
Posts: 890
Location: Upton, Massachusetts
GM Synchromesh Transmission Fluid Part # 12345349

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1969 Dodge Super Bee 440 Six Pack 12.48 at 109
1969 Dodge Dart Swinger 500'' Indy 9.75 at 139
1968 Plymouth GTX J code 426 Hemi 4 speed
1964 Dodge Polara 500 Golden Anniversary 383
1963 Dodge Polara 426 Ramcharger Stage II 10.94 at 126


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 Post subject: Re: Manual transmission gear oil reccomendation?
PostPosted: Mon Sep 24, 2012 12:38 pm 
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Joined: Mon Aug 24, 2009 1:48 pm
Posts: 82
I have run synthetic and non. I didn't have any problems with the syncros with the synthetic which surprises folks. I ran it that way for many years. Ed Hartnett just did my transmission this summer after roughly 6 years. It's a muncie supercase M21. The only issues were cluster gear and input bearing. Of course the expendables were replaced. That said I put non synthetic in it this time.

Scott


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 Post subject: Re: Manual transmission gear oil reccomendation?
PostPosted: Tue Dec 10, 2013 12:12 am 
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Joined: Sun Dec 26, 2010 11:42 am
Posts: 564
Location: Florida
I found that Brad Penn sells gl-4, non synthetic. Picked up a few quarts last week.

_________________
1972 Chevelle SS 454 4 speed
1969 Malibu 2dr hardtop L48/4 speed -> 427 L72
1968 Malibu 2dr hardtop restomod
1972 Monte Carlo

Yes, I have an addiction.


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