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T56 synchro springs 3-4 vs 5-6 &R

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Old Feb 13, 2020 | 12:36 PM
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m300slr's Avatar
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From: Cincinnati, OH
Car: 1985 Z28
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.90 10 bolt eaton posi
T56 synchro springs 3-4 vs 5-6 &R

So i bought some "billet" keys with springs that fit 3-4 5-6 & R. But after some research it seems that the 3-4 spring is different than the others? Can anyone clarify that for me? Also the springs I got have a bent end on both sides.
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Old Feb 13, 2020 | 01:03 PM
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m300slr's Avatar
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From: Cincinnati, OH
Car: 1985 Z28
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.90 10 bolt eaton posi
Re: T56 synchro springs 3-4 vs 5-6 &R

Also, I should add that the springs go way past the keys. When I put the spring on just above the 1 key the other end ends up a good inch past the 3rd key. Is this ok? Seems like it should be a better fit. Maybe cut the other end?
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Old Feb 13, 2020 | 02:09 PM
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From: Lansing, Mi
Car: One owner '88 IROC 50k
Engine: L98 with bolt ons.
Transmission: T56
Axle/Gears: 3:42 again
Re: T56 synchro springs 3-4 vs 5-6 &R

Don't cut them. The bent ends are to keep them from rotating off the keys. Center the ends between the keys on the open end. Also on the flip side I put the springs 180 deg off from the 1st ring to help ensure even tension.
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Old Feb 13, 2020 | 02:19 PM
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m300slr's Avatar
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Joined: Mar 2002
Posts: 241
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From: Cincinnati, OH
Car: 1985 Z28
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.90 10 bolt eaton posi
Re: T56 synchro springs 3-4 vs 5-6 &R

Thanks daferris. I set them up 180, but aligned the one tab just in front of the one key so its way off on the other side. I will change that so they are even. Still curious about the overall size, and weather there is a different spring I should use for 3-4.
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