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

Fox Rear Main 1 Or 2 Piece

  • Thread starter Thread starter 90lxwhite
  • Start date Start date Feb 10, 2014

90lxwhite

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#1
  • Feb 10, 2014
  • #1
I know ive asked before and just got done doing a google search and I got both answers. Does 302 have 1 piece or 2 piece seal? Please help

Mike
 

madspeed

Colonel Mustard
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#2
  • Feb 10, 2014
  • #2
both are available
 

90lxwhite

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#3
  • Feb 10, 2014
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madspeed said:
both are available
Click to expand...
What came stock? It is an aod if that matters. I read that if its a 2 piece its eaiser to change due to motor not having to be lifted, any truth in that?
 

madspeed

Colonel Mustard
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#4
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i think Ford changed to the one piece in the early eightees. Tranny needs dropped or motor needs pulled to replace the rear main. Are you certain its leaking? Do you have a functional pcv system?
 

90lxwhite

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#5
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Yeah PVC. Not 100% its rear main but leaking in area
 

madspeed

Colonel Mustard
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#6
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oil pan gasket is more prone to leaking in that area
 

revhead347

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#7
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I believe it's 86' and newer is a 1 piece, older is a 2 piece.

Kurt
 

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#8
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I know for a fact that my '86 5.0 had a one-piece seal. I changed it when I swapped trannies.
 

Mustang5L5

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#9
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Older 5.0's had the 2-peice, and the newer ones went 1-peice. I beleive the 1-piece will retroactively swap into older cars though...not sure.

If we knew the year of the 302 in question, we could give a better answer. If it's a '87 or later, definitely 1-peice. Not sure when the swap to the 1 peice happened, but i wanna say early. 1984ish?
 

revhead347

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#10
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I know it's somewhere around there. I know Chevy updated their small block in 1986; maybe that's where I'm getting that date from. I know the two seals are not interchangeable. The local engine builder offers the service of updating the older engine to a one piece design by machining it some how.

Kurt
 

90lxwhite

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#11
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Mustang5L5 said:
Older 5.0's had the 2-peice, and the newer ones went 1-peice. I beleive the 1-piece will retroactively swap into older cars though...not sure.

If we knew the year of the 302 in question, we could give a better answer. If it's a '87 or later, definitely 1-peice. Not sure when the swap to the 1 peice happened, but i wanna say early. 1984ish?
Click to expand...
1990
 

90lxwhite

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#12
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madspeed said:
oil pan gasket is more prone to leaking in that area
Click to expand...
Yeah?
 

Grabbin' Asphalt

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#13
  • Feb 11, 2014
  • #13
5.0's produced after 11/30/82 were 1 piece rear mains. used 2 piece seals prior to this date

http://www.ebay.com/itm/Ford-Racing...on-Ford-1983-2001-5-0L-302-Each-/191038554491
 
Last edited: Feb 11, 2014

Mustang5L5

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#14
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90lxwhite said:
1990
Click to expand...

1990 5.0 was 1-peice.
 

90lxwhite

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#15
  • Feb 11, 2014
  • #15
Mustang5L5 said:
1990 5.0 was 1-peice.
Click to expand...
Thank you
 
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