| [GMCnet] Re: Minor change in topic. Trans. Changeing to, or from Syn [message #365979] |
Sun, 08 August 2021 15:52 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Bob,
Having the 3.70 must help?
On Sun, Aug 8, 2021 at 1:41 PM Bob Dunahugh wrote:
> Just a thought. Sorry. I don't fallow the net as much anymore. This may
> have been covered. But. You can only change to just synthetic. Is at a
> total trans rebuild, and converter flush/replacement. When you change
> fluid, and filter. You're only able to drain around half the old fluid out.
> You'll never get to 100% of either. While converting.
> I rebuilt my 425 trans in 2004 myself. Then Installed it with an Allison
> converter. That trans is now in our second 78 Royale. With around 100,000
> miles on it combined. No synthetic ever used. My minimum GVW is at 17,000
> lbs. Max is at 24,000 lbs. Change fluid ever 12,000 miles. When in the
> mountains. NEVER use more than half to 5/8 throttle. Shift to a lower gear.
> The keep RPMs in the 4400 to 4800 RPM range. Seldom above 5000. 3:70. 403.
> Bob Dunahugh
> 78 Toyale since 2003
> 4 real COPO Yenkos
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--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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