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10-22-2012 07:29 AM #1
CHR Member
- Join Date
- Oct 2012
- Location
- NorCal
- Posts
- 32
Trans oil and additive for a 67 GMC P/U with manual trans?
I just got my 67 GMC pickup on the road after 9 years. It's got the stock 4 speed (with granny gear) manual trans. I changed the trans oil to a redline product- I think it was MT 90- back in 2002, and the truck has been parked in Central California since then. I don't think the MT 90 made a difference in the 500 miles or so I drove it after changing to MT 90 in 2002.
Should I change the trans oil again? Is there an additive that might help with the grinding? I'm guessing it's synchros going out. I'll probably be changing the trans to something more modern in a year or two, so dont plan on any repair work to this trans.
Thanks!67 GMC Pickup, owned since I was 15, driven regularly til 1997, in storage until Oct 2012. SBC 283 from a buddy's 66 Chevelle, stock engine, stock 4 speed tranny with granny gear. Working on a light restoration.
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10-22-2012 07:37 AM #2
CHR Member/Contributor
- Join Date
- Sep 2007
- Location
- Gardner, KS
- Car Year, Make, Model: '33 HiBoy Coupe, '32 HiBoy Roadster
- Posts
- 11,241
I like the Royal Purple SynchroMax fluid personally. That's what I use in my Jeep six-speed and it smoothed it out some.Roger
Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.
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10-22-2012 01:07 PM #3
CHR Member
- Join Date
- Oct 2012
- Location
- Amarillo
- Car Year, Make, Model: 1988 Chevy Silverado C1500
- Posts
- 2
I use AMSOIL for all my vehicles
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Dammit, another good ol boy gone. Condolence to the family. RIP Mike
RIP Mike Frade, aka 34_40