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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

Rear end catch can? Anyone? Bueller?

  • Thread starter Thread starter DadLife0724
  • Start date Start date Aug 26, 2025

DadLife0724

Active Member
Mar 22, 2024
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Cooperstown, PA
Aug 26, 2025
#1
  • Aug 26, 2025
  • #1
Decided to make my own catch can for the rear end, until I can come up with a couple hundred bucks to get a nice setup. Roast me, or throw me some suggestions. Seems to work so far. Haven't had it at WOT yet due to roads being wet during test drive. My only concern is the hose pulling off of the rear end. It does have slack so it can adjust during suspension travel. I wonder if it's enough slack.

P.S. Don't mind the clownish strut tower cover. That was previous owner who thought it was a good idea to paint random interior parts blue.
 

bird_dog0347

still married haven't seen testicles in years
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Little Elm, TX
Aug 26, 2025
#2
  • Aug 26, 2025
  • #2
Do you run your car hard enough to need one? If you're not open tracking, racing, or auto-x then you shouldn't really need it, even if you have an IRS.
 

Bullitt347

I have been doing it wrong this whole time
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#3
  • Aug 26, 2025
  • #3
I have spun my rear pinion gear 600 revolutions in 8.5 seconds at max power and did not have any overflow from the rear diff.
Now add in off throttle slowing down from 160 mph and still not a drop.
If you need a catch can for the rear diff, you either have over-filled the rear diff, or you are upside down along the road somewhere.
 
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DadLife0724

Active Member
Mar 22, 2024
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Cooperstown, PA
Aug 26, 2025
#4
  • Aug 26, 2025
  • #4
Good possibility it is overfilled. The fill hole on the Drake girdle confuses me. Destructions say to fill till it overflows. It's more than the 8.8 calls for when done that way though. I do drive it like I stole it. I just currently got it running correctly and I am still I'm the stupidity phase.
 

AeroCoupe

lube between the nut and the face. I know my lubes
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Aug 26, 2025
#5
  • Aug 26, 2025
  • #5
I only use the drain plug on my TA girdle. Still use the Ford plug just above the pinion and to the right to fill it.
 
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nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
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#6
  • Aug 26, 2025
  • #6
Unnecessary roughness!!!!
 

bird_dog0347

still married haven't seen testicles in years
15 Year Member
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Little Elm, TX
Aug 26, 2025
#7
  • Aug 26, 2025
  • #7
DadLife0724 said:
Good possibility it is overfilled. The fill hole on the Drake girdle confuses me. Destructions say to fill till it overflows. It's more than the 8.8 calls for when done that way though. I do drive it like I stole it. I just currently got it running correctly and I am still I'm the stupidity phase.
Click to expand...
Yeah, for a stick axle you're very likely overfilled. If it's an IRS and you run it HARD on track, you'll want a catch can but not for a street car.
 
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Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
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Box behind Walmart
Aug 27, 2025
#8
  • Aug 27, 2025
  • #8
Do a snorkel next!
 
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90trunk

Active Member
Mar 5, 1999
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Downriver DTW, Michigan
Aug 27, 2025
#9
  • Aug 27, 2025
  • #9
Did you look at the Ford S197 Remote Vent Upgrade kit for the 8.8? DR3Z-4022-A
They go for about $32.00. It seems to be a clean option for most applications.


 
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