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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JunkYardCrawler, Mar 30, 2002.
i don't know how to tell if my 700R4 is a lock up or not. how can i tell?
There should be the vac. control for the lockup on the pass side of the firewall. Its a little piece of plastic with a vacuum line going to it.
All 700R-4 trannies are lockup.
If the lockup fails and you continue to load the trans in OD, the OD will roast becuase the pump is not supplying enough pressure.
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