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 Hd transmission?

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bmcd9179
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PostSubject: Hd transmission?   Sat Oct 12, 2013 11:41 pm

I have a 1996 riviera, in the 1997 and up they upgraded to the hd transmission with the stronger gear box and torque converter, does anyone know if I could just buy the upgraded hd transmission and bolt it on or is it more complicated then that?
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AA
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PostSubject: Re: Hd transmission?   Sun Oct 13, 2013 8:55 am

I believe the HD transmissions and non-HD transmissions are the actually same. The HD version adds a tougher differential, HD diff cover, and HD passenger-side axle (driver-side axle remains the same as non-HD versions).

Also keep in mind your '96 has the 4T60E (HD) transmission, whereas the '97-up Rivs had the 4T65E & 4T65E-HD. Only supercharged models received the HD versions.

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bmcd9179
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PostSubject: Re: Hd transmission?   Sun Oct 13, 2013 12:33 pm

Oh sweet! I was wondering bc my transmission hits hard if I shift down into the lower gears, so I don't do that, I think the guy before me beat it up a little. But shifts great if I keep it in D so thanks a lot:) I have the supercharged model btw so yah.
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matt270avian
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PostSubject: Re: Hd transmission?   Wed Oct 21, 2015 6:51 pm

Anyone know if the 4T60E-HDs from the '96 Bonnevilles/Park Avenues/Eighty Eights will drop in a '96? I don't think they have that webbing everyone talks about, but at the same time I don't know if the 60Es got that webbing in the first place......
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LARRY70GS
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PostSubject: Re: Hd transmission?   Mon Oct 26, 2015 7:24 pm

bmcd9179 wrote:
Oh sweet! I was wondering bc my transmission hits hard if I shift down into the lower gears, so I don't do that, I think the guy before me beat it up a little. But shifts great if I keep it in D so thanks a lot:) I have the supercharged model btw so yah.


If you shift any automatic transmission manually, the line pressure gets boosted from what you would get leaving it in DRIVE.

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98 Riviera SC3800  All stock except gutted air box.
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