M1008 3L80 rebuilt kit recommendations

MilesLong23

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Charlotte, North Carolina
Hey y’all I have a 1984 m1008 with the 3L80 in it and I was wondering what recommendation y’all have for a complete overhaul kit and what level of shift correction do I need! I do some street highway and off-roading! I want to make it stronger and better. I have the stock 6.2 liter engine as well. Thank you!
 

wheelspinner

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The 3L80 “Turbo 400” is an excellent trans and very strong as it is. If you want better street driving as well as a good off-road option it may be time to step up to an overdrive trans (700R4 or 4L80) both have their own pros and cons
 

cwc

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Carrollton, KY
Are you going to do the overhaul yourself? I usually do the teardown first to see what it needs, then go shopping once. You might have a local store that serves local trans shops that has the parts on the shelf (here near Louisville we have Whatever It Takes, great to deal with.) I would not block the accumulators since the shifts tend to be fairly firm as is. You might consider upgrading the intermediate clutch sprag/direct drum. (If you get the sprag by itself, watch out for compatibility with your direct drum. The two are often sold together as an assembly.)

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