Crossmember bolt size
Thread Starter
Joined: Oct 2006
Posts: 3,041
Likes: 8
From: West of Toronto
Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Crossmember bolt size
Hey guys,
I'm installing a UMI 700-R4 trans cross member. As I was removing the factory cross member, all four factory bolts snapped.
Guess I'm gonna have to drill them all out.
The UMI cross member did not come with any bolts.
Can anyone tell me what size the trans cross member bolts are?

Thanks
I'm installing a UMI 700-R4 trans cross member. As I was removing the factory cross member, all four factory bolts snapped.
Guess I'm gonna have to drill them all out.The UMI cross member did not come with any bolts.

Can anyone tell me what size the trans cross member bolts are?

Thanks
Joined: Sep 2005
Posts: 27,918
Likes: 2,448
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Crossmember bolt size
Stock size is 10mm x whatever the "std" (not "fine") thread pitch is for that dia (1.5mm I think) x about 40mm long.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Crossmember bolt size
https://www.thirdgen.org/forums/afte...-t5-cross.html
JamesC
Last edited by JamesC; Dec 15, 2010 at 08:29 AM.
Thread Starter
Joined: Oct 2006
Posts: 3,041
Likes: 8
From: West of Toronto
Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: Crossmember bolt size
M10 x 1.5 x 32. You might check with UMI, because my cross member arrived with new bolts/washers. You may remember the following review:
https://www.thirdgen.org/forums/afte...-t5-cross.html
JamesC
https://www.thirdgen.org/forums/afte...-t5-cross.html
JamesC
and I have an ES poly trans mount to install as well.I sent two emails to UMI and heard nothing.
I left them a message on their facebook page as well. Joined: Aug 2006
Posts: 12,807
Likes: 108
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
Re: Crossmember bolt size
is this just the crossmember, or a crossmember mounted torque arm? the crossmember mounted torque arm i bought years ago came with 6 bolts and washers.
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Crossmember bolt size
http://www.umiperformance.com/catalo...roducts_id=139
JamesC
Thread Starter
Joined: Oct 2006
Posts: 3,041
Likes: 8
From: West of Toronto
Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: Crossmember bolt size
Note what the following advert says about new hardware:
http://www.umiperformance.com/catalo...roducts_id=139
JamesC
http://www.umiperformance.com/catalo...roducts_id=139
JamesC
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Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Crossmember bolt size
JamesC
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