This may sound stupid, but how can you tell a World class from a regular T-5??

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
"He can see air"

 

Look at the front of it, there will be a round plate with the words TIMKIN on the edge if its World Class. Also, the ones I've seen have a partial VIN etched into them, the last 8 digits or so. The 2nd digit will be a J (for 88) or later. (J,K,L,M,N)

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Look at the front countergear bearing, like Kevin said. If it's the 1st design it will be completely flat except with its outside edge looking kind of rolled-over, and very shiny, looks sort of like an upside-down freeze plug. If it's the 2nd design aka "World Class", it's the Timken tapered roller, which has a dull finish, the edges are sharp, and it has a depression in the middle that makes it look like there's a ridge about ¼" wide all the way around it.

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"So many Mustangs, so little time..."
ICON Motorsports

 

Go to: http://www.5speeds.com/
Click on T5 speeds on the left side... there's an identification guide.

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'89 Formula - Thunderchicken - 355 Vette L98/T-5/3.45 9-bolt/black/t-tops - the fun car!
'90 GTA - The GTA - 5.0 LB9/TH700/3.27 9-bolt/black/t-tops/tan leather - the cruiser.

 

Cool, thanks.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
"He can see air"