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Old 03-12-2015, 03:16 PM   #26
GRADYS Performance
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Re: 85 Suburban TH400 to 4L80E swap

Quote:
Originally Posted by 72MARIO View Post
Any reason not to post the speedo conversion info here ? I am interested too. Do you sell the kit ?
I sent a PM to you about the Speedometer conversion kit that we offer.
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Old 09-28-2018, 08:49 AM   #27
zipper421
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Re: 85 Suburban TH400 to 4L80E swap

could you send me the speedo info to
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Old 09-28-2018, 09:36 AM   #28
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Re: 85 Suburban TH400 to 4L80E swap

I will send the Info to you.
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Old 10-17-2018, 08:27 PM   #29
BigDooley77
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Re: 85 Suburban TH400 to 4L80E swap

Grady's Performance did you use the th400 linkage part that's on the trans or did you use a 4l80e? I'm almost done with my swap and am stuck on this
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1977 GMC Sierra Classic CCDW. 454 worked 781s, 277/287, Lift .502/.501 LS 114, Dual plane intake, Dana 70 (4.10) and 4L80e (HD2 kit).

http://67-72chevytrucks.com/vboard/s...63#post8361863
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Old 10-18-2018, 03:58 PM   #30
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Re: 85 Suburban TH400 to 4L80E swap

nevermind figured it out

http://67-72chevytrucks.com/vboard/s....php?p=6834660
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1977 GMC Sierra Classic CCDW. 454 worked 781s, 277/287, Lift .502/.501 LS 114, Dual plane intake, Dana 70 (4.10) and 4L80e (HD2 kit).

http://67-72chevytrucks.com/vboard/s...63#post8361863
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