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Old 05-20-2022, 10:31 AM   #7
James Lamb
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Join Date: Mar 2019
Location: Knoxville AL
Posts: 74
Re: 87-91 tbi suburban wiring diagrams

I wish you the absolute best luck with the 700R4. I know a lot of people have good experiences with them. I have not. The one in my truck was rebuilt maybe 5 times since I've owned it. I finally gave up and had a 4l60e put in, which is the exact same transmission, same gearing, same dimensions, but electronically controlled. That removes the sensitivity of the Mal-adjusted tv cable. Plus it locks up in 3rd and 4th. And you can program in shift point and firmness of shifts. So if you ever need to go that way I'm pretty happy with mine.
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1989 Suburban 1500 4 x 4
1989 BMW 325i
1945 Willys MB Jeep
1959 Triumph TR3A
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