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- - 70 C20 w/auto trans Rolls When in Park (https://67-72chevytrucks.com/vboard/showthread.php?t=763303)

CW4B	05-06-2018 01:06 AM

70 C20 w/auto trans Rolls When in Park

Truck rolls despite being in park. Even slightest incline/decline. Where do I start troubleshooting?

Just bought truck, rough shape, presently focused on getting it running and driving safely. One of many issues is that it rolls even on the slightest incline/decline despite being in "park." Emergency brake needs help too, but that's for another thread.

Thanks

Steeveedee

05-06-2018 12:06 PM

Re: 70 C20 w/auto trans Rolls When in Park

The linkage may just be out of adjustment. See if you can loosen it and rotate the crank on the trans a little further to lock it up. If not, the trans has to come apart to fix this.

CW4B	05-06-2018 12:23 PM

Re: 70 C20 w/auto trans Rolls When in Park

Quote:

Originally Posted by Steeveedee (Post 8255485)

The linkage may just be out of adjustment. See if you can loosen it and rotate the crank on the trans a little further to lock it up. If not, the trans has to come apart to fix this.

OK, will give that a try. Probably a transmission job given that the emergency brake peddle was broke off and hobbled back together with a small plate and some bolts after a bad weld job didn't work.

Thanks,

Bigdav160

05-06-2018 12:49 PM

Re: 70 C20 w/auto trans Rolls When in Park

You might have to take the transmission pan off. I've seen the park linkage retainer bolts come off a couple times.

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