Transmissions and Drivetrain Need help with your trans? Problems with your axle?

what size socket to remove tranny mount bolt

Old Sep 23, 2004 | 06:50 PM
  #1  
matt formula's Avatar
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Joined: Aug 2003
Posts: 76
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From: Exton, PA
Car: 1990 firebird formula
Engine: V8 305 TBI
Transmission: TH700R4
what size socket to remove tranny mount bolt

just need to know what size socket I need to remove the bolt that connects the tranny mount to the crossmember
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Old Sep 23, 2004 | 09:10 PM
  #2  
ljnowell's Avatar
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Not to be rude, but its the one that fits. C'mon man, how lazy can you be. In the time it took you to post this, you could have got under the car and found out.
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Old Sep 23, 2004 | 09:50 PM
  #3  
waltersb's Avatar
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Joined: Dec 2001
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From: Burnaby, BC, Canada
Car: 1989 Camaro Iroc-Z
Engine: 305 TPI (LB9)
Transmission: Auto 4
I'm gonna re-iterate ....

You have a socket set right?

I mean really, take it with you under the car and try them out...

hint it's metric...
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Old Sep 23, 2004 | 10:29 PM
  #4  
ljnowell's Avatar
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In all honesty it was big. Take like 16-19 under the car, Its one of those IIRC. I should it was only a few months ago I was doing that.
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Old Sep 23, 2004 | 11:35 PM
  #5  
88IROC350TPI's Avatar
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Joined: May 2001
Posts: 2,009
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From: Pitman, NJ
Car: '89 IROC-Z
Engine: Canfield 195 headed 358ci
Transmission: TH350, Art Carr 9.5"
Axle/Gears: 3.92 Dana 44
I believe its 15mm or 16mm... I put my transmission in last week, thats the only reason I know that off the top of my head
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Old Sep 24, 2004 | 11:16 AM
  #6  
Jim Berry's Avatar
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Joined: May 2001
Posts: 552
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From: San Antonio, Texas
Car: '86 Trans Am
Engine: LG4
Transmission: 700R4
Axle/Gears: 3.70 Posi disc 9 bolt
I just installed a new transmission also. Had to drop it out of an 87 T/A in the junkyard, plus drop my fragged unit.

Trans mount 15 mm.
Trans crossmember 15mm.
U-joint bolts 7/16.
Torsion bar to tranny tail 15mm (you'll need two of them; an open end and a box end)
Tranny pan 13mm.
Shift linkage 13mm.
Flywheel cover 10mm.
Torque Converter Flywheel bolts 15mm. (box end)
Trans cooling lines, on trans body, 1/2. (not enough room for line wrenches, even with crossmember dropped, recommend "stubby" 1/2).
Trans housing to engine bolts 9/16 (recommend "stubby" 9/16).

Jim.
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Old Sep 24, 2004 | 12:10 PM
  #7  
ljnowell's Avatar
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Yours are definately different than mine. My Trans crossmember was an 18. I also found that 11mm was a better fit for the rear Ujoint than a 7/16. Everything else looks the same.
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Old Sep 24, 2004 | 01:40 PM
  #8  
ThommyDee's86Z's Avatar
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Joined: Sep 2003
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From: Kansas City Mo
Car: 86 Z28 w/ T Tops
Engine: 305 SB w/ Performer intake 3701
Transmission: 700 R4
Axle/Gears: stock
My trans mount was 9/16
My Cross member was 15 mm
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Old Sep 26, 2004 | 10:19 PM
  #9  
JeffW's Avatar
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Joined: Jun 2003
Posts: 1,985
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From: Massachusetts
Car: candy blue 85 z28
Engine: 305 tpi LB9
Transmission: 700r4 crazy beefed up one
Axle/Gears: ones with teeth
i used a 25 on about every bolt except the u joint that was a 11

my new wonder tool. ya know wonder what i did without one....

craftsman ratching wrench. ya know the box end is a ratchet. works great on those tight to get into trans bolts. made quick work of em....highly reccomend for trans bolts.

Jeff
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