400 turbo, no park, why? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hair · 05-29-2020, 06:03 PM

I have a 1970 one ton truck with a 350 engine and a 400 turbo, I think it was originally a big camper truck, but has been made into a flatbed, the transmission has no park from the factory. Why did they do this?

**AussieinNC** · 05-29-2020, 08:08 PM

Quote:

Originally Posted by Hair

I have a 1970 one ton truck with a 350 engine and a 400 turbo, I think it was originally a big camper truck, but has been made into a flatbed, the transmission has no park from the factory. Why did they do this?

Post a pic of steering column showing wheel and gear selector including the indicator....

They all have a Park position...above Reverse....PRND2L

Does the trans have a large hand brake drum on the output shaft?

**kwmech** · 05-29-2020, 10:58 PM

My 69 GMC was like that. No parking pawl in the trans and just RNDL on the column. I changed out the column to a tilt and put the lever in the trans when I rebuilt it. I think the reason was the GVW rating. Somewhere along the line I think they thought a 10k plus rated truck would break the trans because a lot of people do not set the parking brake. Without park it was mandatory that you did. I've seen quite a few that way in both the 10 and 14k ratings.

**AussieinNC** · 05-30-2020, 07:34 PM

Thanks KW....

That's why I asked OP about large handbrake drum on rear of trans...

10k and 14k trucks are strange like that...

OP listed his truck as a 1970 One Ton truck....

Hence my response

**kwmech** · 05-31-2020, 12:21 AM

Mine did not have the P brake on the trans, just the normal drums on the rear axle. When I got my 69 it was a class B motor home that was all rotted out with only 49k on the speedo

Hair · 06-01-2020, 12:00 PM

Yes, my truck is just like KWMECH's. I guess you could call it a motor home, but it is a truck cab with a humongous camper on back that was removed by PO to make a flatbed. He told me about the park and I would have thought he was full of it, but the column indicator doesn't have P either. Hence, I asked my question.

**kwmech** · 06-01-2020, 02:30 PM

Yeah, mine used to be a Class B motorhome that was rotted beyond repair. I cut 2 feet of frame off the back and still ended up with a 10' long deck

05-29-2020, 06:03 PM	#1
Hair Registered User Join Date: Mar 2008 Location: Tullahoma, TN Posts: 406	400 turbo, no park, why? I have a 1970 one ton truck with a 350 engine and a 400 turbo, I think it was originally a big camper truck, but has been made into a flatbed, the transmission has no park from the factory. Why did they do this?

05-29-2020, 10:58 PM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,390	Re: 400 turbo, no park, why? My 69 GMC was like that. No parking pawl in the trans and just RNDL on the column. I changed out the column to a tilt and put the lever in the trans when I rebuilt it. I think the reason was the GVW rating. Somewhere along the line I think they thought a 10k plus rated truck would break the trans because a lot of people do not set the parking brake. Without park it was mandatory that you did. I've seen quite a few that way in both the 10 and 14k ratings.

05-30-2020, 07:34 PM	#4
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,156	Re: 400 turbo, no park, why? Thanks KW.... That's why I asked OP about large handbrake drum on rear of trans... 10k and 14k trucks are strange like that... OP listed his truck as a 1970 One Ton truck.... Hence my response __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

05-31-2020, 12:21 AM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,390	Re: 400 turbo, no park, why? Mine did not have the P brake on the trans, just the normal drums on the rear axle. When I got my 69 it was a class B motor home that was all rotted out with only 49k on the speedo

06-01-2020, 12:00 PM	#6
Hair Registered User Join Date: Mar 2008 Location: Tullahoma, TN Posts: 406	Re: 400 turbo, no park, why? Yes, my truck is just like KWMECH's. I guess you could call it a motor home, but it is a truck cab with a humongous camper on back that was removed by PO to make a flatbed. He told me about the park and I would have thought he was full of it, but the column indicator doesn't have P either. Hence, I asked my question.

06-01-2020, 02:30 PM	#7
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,390	Re: 400 turbo, no park, why? Yeah, mine used to be a Class B motorhome that was rotted beyond repair. I cut 2 feet of frame off the back and still ended up with a 10' long deck



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