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What fluid to use

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Old Nov 5, 2013 | 02:09 AM
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Default What fluid to use

Hey Forum Gurus,,
I'm finally putting the Porvette back together after a 10 year "stand-by". I've gotta do the front caliper rebuild (parts on the way) but I noticed a leak at the steering box where the pitman arm mounts. I'm not gonna worry about replacing the seal yet but I wanna make sure the fluid is "full". According to 2 Corvettte books I have, I removed the "fill" & the "level check" bolts on top of the box. I can't see any fluid down either shallow hole. All I can got so far is to use the "specified gear lubricant", but no idea what that is. So, queston is, what fluid/gear lube goes into the steering box? It's a '79 with tele/tilt/power steering.
Thx,,, Bill A
ps: sold our first 2014 Vette at Lester Glenn Chevy in Toms River.
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Old Nov 5, 2013 | 11:50 AM
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A good quality chasis lubricant, but you may have old grease in there that has become compacted and hardened.
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Old Nov 5, 2013 | 05:55 PM
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I've used 80w gear oil before with no problems. It's a bit more viscous than the original stuff that came in a tube, but if 80w will handle a ring & pinion, it will stand up to anything in the steering box.
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Old Nov 6, 2013 | 02:41 PM
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read this thread

http://forums.corvetteforum.com/c3-g...ox-grease.html
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Old Nov 6, 2013 | 02:50 PM
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Use the chassis type grease. The 80-140 gear lube will run right through unless your seals are perfect. And that is seldom the case.

Ralph
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Old Nov 7, 2013 | 06:35 PM
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Thanx guys. I'm almost afraid to take it apart since it's at 155,000 & has probably never been apart. Maybe I'll just bite the bullet & tear it down & start from scratch.
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Old Nov 8, 2013 | 11:53 AM
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Are you a reasonably good mechanic? DIY guy with decent set of tools?

If so, you can remove the top cover of the steering box (IF YOU DO IT PROPERLY SO THAT YOU DON'T CHANGE THE BOX ADJUSTMENT) so that you can remove most of the old grease (or whatever the PO put in that box) and replace it with hi-temp synthetic grease. Synthetic will not melt when warm, so the box is likely be leak-free.

If you need to know the correct procedure for doing that task, send me a PM.

Otherwise, the approach you have mentioned is correct...buy you'll still have whatever [leaky] lubricant the PO installed in that box.
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