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Mod | | | Forums66 Topics128,080 Posts1,055,953 Members48,430 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Apr 2011 Posts: 174 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 174 | I have a couple questions as to which oils/fluids to use.
Transmission oil.... is there any specific type i should use? and where do i fill it? ive seen pics on a couple trucks that have a spout leading to the transmission but mine doesn't.
Diff fluid... Im not sure if my problem is that i have no fluid left, but when i was doing my brakes i noticed a "ticking" noise come from the differential every time the rear wheels were spun, same for the front.
Steering box, it has a "ticking" noise just like the rear diff when the steering wheel is turned, im not sure if this is the issue i have with the front wheels ticking or if its just the steering box
Any suggestions on what i should use? or even maybe my problem isnt low fluid/oil but just a bunked up part? | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Josh_51GMC, you could use 80-90 wt. for all three of those applications, after you fill watch for leaks from everything. The transmission fills through a plug on the side of the case. about a third of the way up the side, fill to the bottom of the threads. The diff. fills through a plug in the rear of the housing (actually a cover), fill to the bottom of the threads. The steering box fills through a plug in the top of the housing, there has been a lot of discussion about using John Deere corn head grease in the steering box as it is obviously less likely to leak out, hope that helps. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | You should not have a ticking noise coming from the steering box. If you feel any roughness in the steering, get it checked out.
I changed my transmission fluid in my 4 speed to 80w140 and I found the synchros worked a little faster. | | | | | Joined: Apr 2011 Posts: 174 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 174 | Thanks 3B, any idea's as to how much oil i should get? also, i know draining the transmission is a no brainer before adding new oil, but what about the diff and steering box?
Truckernix, i thought the same but my shop teacher said it could just be that any left over grease/oil has hardened/dried and that is what is causing the ticking... i currently have the truck up on stands and the steering wheel turns real smooth, and easy | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Josh_51GMC, the factory fluid measurements are in pints, you may never have heard of that measurement. There are roughly two imperial pints to a litre. Four speed transmission capacity is 5 1/2 pints, rear axle capacity 6 pints, steering box is probably less than a pint, hope that helps. | | | | | Joined: Apr 2011 Posts: 174 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2011 Posts: 174 | | | |
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