Turbo 350 wont shift - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jhiggy94 · 05-31-2013, 12:25 PM

I am nearing the end of my build of my 72 K20 and i wanted to see if the truck would move on its own power. It has the TH350 trans with the stock 350 engine. The truck starts fine but when i shift out of park nothing happens. ( its an automatic btw). I did take out the steering column at one point would me not reinstalling this cause this problem? I did not touch the engine or trans at all during the build. When I have it in 4Low then when i shift into reverse it feels like it shifts ( the truck jerks backward a bit) but when i press the gas still nothing happens. It just revs up like it was still in park. Thanks for any help
Jake

Frijolito1988 · 05-31-2013, 01:09 PM

Does it have transmission fluid ?

EDIT to add

Even if its low on fluid it will not shift and you can burn up the tranny.

jhiggy94 · 05-31-2013, 01:40 PM

I added transmission fluid a little while ago but it has a small leak so it could have gone down. Ill check it out. Thanks for the reply

Longhorn 70 · 05-31-2013, 02:42 PM

does it roll if you push the truck at all?

Toxic Orange · 06-01-2013, 12:11 AM

Check linkage and fluid level. Has to have enough fluid to build pump pressure to engage. Linkage would have had to have been affected if you took out the column.

05-31-2013, 12:25 PM	#1
jhiggy94 Registered User Join Date: Jun 2012 Location: Birnamwood, Wisconsin Posts: 178	Turbo 350 wont shift I am nearing the end of my build of my 72 K20 and i wanted to see if the truck would move on its own power. It has the TH350 trans with the stock 350 engine. The truck starts fine but when i shift out of park nothing happens. ( its an automatic btw). I did take out the steering column at one point would me not reinstalling this cause this problem? I did not touch the engine or trans at all during the build. When I have it in 4Low then when i shift into reverse it feels like it shifts ( the truck jerks backward a bit) but when i press the gas still nothing happens. It just revs up like it was still in park. Thanks for any help Jake __________________ My K20 build http://67-72chevytrucks.com/vboard/s...d.php?t=538539

05-31-2013, 01:09 PM	#2
Frijolito1988 Registered User Join Date: Jul 2010 Location: So Cal Posts: 421	Re: Turbo 350 wont shift Does it have transmission fluid ? EDIT to add Even if its low on fluid it will not shift and you can burn up the tranny.

05-31-2013, 01:40 PM	#3
jhiggy94 Registered User Join Date: Jun 2012 Location: Birnamwood, Wisconsin Posts: 178	Re: Turbo 350 wont shift I added transmission fluid a little while ago but it has a small leak so it could have gone down. Ill check it out. Thanks for the reply __________________ My K20 build http://67-72chevytrucks.com/vboard/s...d.php?t=538539

05-31-2013, 02:42 PM	#4
Longhorn 70 Registered User Join Date: Dec 2012 Location: Chandler AZ Posts: 1,149	Re: Turbo 350 wont shift does it roll if you push the truck at all? __________________ 1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9

06-01-2013, 12:11 AM	#5
Toxic Orange Registered User Join Date: Apr 2013 Location: Flower Mound TX Posts: 173	Re: Turbo 350 wont shift Check linkage and fluid level. Has to have enough fluid to build pump pressure to engage. Linkage would have had to have been affected if you took out the column.



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