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

T5 5th gear interchangeability

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Old 02-15-2018, 01:08 PM
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Location: El Sobrante, California
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Car: 1984 z28
Engine: 93 LT1 350
Transmission: T56
Axle/Gears: 7.625" 28 spline 3.23
T5 5th gear interchangeability

I just pulled a worn out T5 1st gen trans out of my ride and replacing it with the second gen t5.
The 1st gen box has the .73 5th and the second gen has the .63.
Are the 5th gears interchangeable?
Old 02-16-2018, 07:26 AM
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Car: Yes
Engine: Usually
Transmission: Sometimes
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Re: T5 5th gear interchangeability

No. Or at least, not completely.

The one that goes on the mainshaft (driven) is the same; but the one that goes on the countergear (drive) is quite a bit different.
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RamIt (09-19-2022)
Old 02-16-2018, 09:30 AM
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Join Date: Jun 2013
Location: El Sobrante, California
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Car: 1984 z28
Engine: 93 LT1 350
Transmission: T56
Axle/Gears: 7.625" 28 spline 3.23
Re: T5 5th gear interchangeability

Thanks Sofa.
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