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how do i know what trans?

daturbosix

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how do i know if its a 4t60e, 4t65e, or the 4t65e-hd??

if my 98 does end up needing a new trans, what is the best to go with? advantages? disadvantages?
 

Turbocharged400sbc

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a 98 gtp should have spec'd out with the 4t65e HD i believe with the 2.93 gears...if your looking to keep your fuel economy i wouldnt look at the 3.29's too hard
 

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