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#83957 10/09/2007 3:38 PM | Joined: Jul 2005 Posts: 581 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 581 | I'm changing the differential and transmission oil in my '46. I was thinking about adding the Lucas additive to the transimission after reading some old posts on the subject. I went to NAPA but didn't see any Lucas product specifically for differentials. Maybe they were out of stock.
Anyway, what should I look for and what ratio would I use for a 4spd? The book says the refill will take 5.5 pints and I've already drained about 6. If I'm not mistaken that extra .5 looked like rusty water, how would that get in there? What's your take?
Kyle | | |
#83958 10/09/2007 4:46 PM | Joined: Dec 2003 Posts: 2,953 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 2,953 | I believe the Lucas gear additive is the same for both transmissions and differentials. I have it in both but cannot tell you the mix ratio offhand. It should be specified in their brochure.
I have found it to be excellent, or my shifting is getting better!
As to water in the trans the only thing I can think would be a leaking cover gasket. However I am no expert and someone else may have a better idea. | | |
#83959 10/10/2007 4:34 AM | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | Yes, the additive is the same. I run a 70/30 mix in mine. Very smooth shifting.
Bill Burmeister
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#83960 10/10/2007 4:52 AM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I also like it, and many of my friends swear by it.
Seems to quiet things down a bit.
I filled the rear hubs with straight Lucas additive on a 55 COE truck. The rear axle had water in it, and marginal to poor hub bearings, I did inspect and clean them first. They survived the tow from WA to NY, at times over 70 mph, and the hubs always stayed cool to the touch.
Grigg | | |
#83961 10/11/2007 2:50 AM | Joined: Feb 2006 Posts: 117 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2006 Posts: 117 | I run it in my 69 Camaro and like the results. As for water in the pumpkin? Sounds strange to me. The only way water could get in there is through the vent if the cap was busted off? If the seal/gasket was bad, then oil would be draining out, not water getting in. let me know if you figure it out...
Dano
my truck gets better every day...every PAYDAY  | | |
#83962 10/11/2007 2:57 AM | Joined: Jul 2005 Posts: 581 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 581 | Actually the differential is fine, the oil was a consistant dirty grey. The transmission fluid on the other hand was creamy white/brown with about a cup of a lighter weight rusty substance I take to be water. That stuff appears to separate to the top. After that I ran some light weight oil through to clean it up some before I refill it for good. Tomorrow I'm going to O'Reilly for some Lucas.
Now that I think about it. This truck may have been flooded in the flood of '93 here in St. Louis. I think the previous owner said that he had to move alot of stuff due to that. That could explain water in the transmission. | | |
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