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Does anyone have information on where to find eaton 16600 diff cover gaskets. It's roughly 17" across and 12 bolt pattern.

Thanks in advance for any and all help

Phil
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close up diff.jpg (353.12 KB, 108 downloads)


1951 GMC 451
1964 International Harvester v190

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Hy Saw Mill, my Fel-Pro catalogue lists their p/n RDS 5817 as the cover gasket for an Eaton 16600 differential, hope that helps

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3B,

Thanks for the info. I did a search and came up dry. It appears that they no longer list it on their website. Will continue to search with this number. Thanks


1951 GMC 451
1964 International Harvester v190

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Crusing in the Passing Lane
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A Manila folder makes great gaskets!

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
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I made the gasket for my Chevrolet 15000 lb. axle when I swapped the pig. 13 bolt, odd number isn't it?


1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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I've made one from a boot box before.


BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
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You could probably use permatex gasket maker on there without any issues.

Last edited by Puffie40; 10/08/2024 7:29 AM.

1959 Canadian GMC 9600 with a dump box
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I would use RTV. Before we had RTV we used to leave about a1/8" gap between the cover and the housing. Then we wrapped several rounds of cotton string around the whole thing and then tightened it up. We did this on both the cover and the third member and it lasted until we had to take it apart again.

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Finding old cork gaskets is an endeavor you likely wont win. As Ed and Puffie40 have said, manila folder and/or RTV gasket maker are your friend. Be sure to check as some axle diff cover bolt holes are through holes and will need the threads sealed up with RTV or they will slowly weep.

When you assemble, coat both mating surfaces with RTV and mount with the bolts just beyond finger tight. Wait 2 hours and then tighten down to correct spec (wont be much).


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HFfarms,

Thanks for the direction.


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Originally Posted by HFfarms
When you assemble, coat both mating surfaces with RTV and mount with the bolts just beyond finger tight. Wait 2 hours and then tighten down to correct spec (wont be much).
You do not need much RTV to form the gasket. Excessive squeeze-out breaking off inside the housing and causing chaos with pressurized oil systems is why a number of mechanics do not like it. You just need a layer just thick enough that you cannot see the metal beneath. There should only be a minimal amount of squeeze-out if you did it right.

Surface preparation helps as well. I wire brush or scrape the surface clean of crusty stuff (down to bright metal if necessary), and wipe the surface with a little bit of brake cleaner before I apply the RTV.


1959 Canadian GMC 9600 with a dump box
Intro / Details in Big Bolts

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