69 Suburban convert to automatic - The 1947 - Present Chevrolet & GMC Truck Message Board Network

aperry · 02-15-2022, 07:46 PM

What is involved drivetrain-wise in converting to automatic.
69 burb chassis under 67 C10

**richard2717** · 02-15-2022, 08:23 PM

Would need clutch pedal assembly inside, frame bracket and pivot ball assembly for the side of the motor, Bell housing, Flywheel & Clutch Assembly. The auto trans cross member would have to be replaced along with what style transmission. The driveshaft may have to be changed as well

**LockDoc** · 02-15-2022, 10:43 PM

Quote:

Originally Posted by richard2717

Would need clutch pedal assembly inside, frame bracket and pivot ball assembly for the side of the motor, Bell housing, Flywheel & Clutch Assembly. The auto trans cross member would have to be replaced along with what style transmission. The driveshaft may have to be changed as well

I think he is going the opposite way you are thinking Richard. From manual to automatic.

LockDoc

**53burb** · 02-16-2022, 12:41 AM

Not difficult at all to do....many have done it...but this topic will get many more responses in the 67-72 pickup section....the suburbans and trucks are identical from the front seat to the front bumper and everything in between...except the front doors....

**richard2717** · 02-16-2022, 09:06 AM

Quote:

Originally Posted by LockDoc

I think he is going the opposite way you are thinking Richard. From manual to automatic.

LockDoc

yep totally read it the opposite for some reason.

you would need to change flywheel to flex plate, transmission & torque converter of your choice. New transmission lines to go to radiator that is equipped for the lines or install an external cooler. Will have to remove manual cross member and install one for automatic. If planning to run a floor shifter it will make it easier, otherwise you would need a new auto column along with all the shift linkage. Driveshaft most likely have to be changed as well. Can remove the clutch pedal and arm without having to replace the entire clutch/ brake assembly.

aperry · 02-16-2022, 12:43 PM

Thanks for responses. Truck is in another location currently.
I see I have to ID the transfer case. Maybe its a NP205? I know it has a low first gear, mostly unused. Then locate a short 4x4 tail shaft for TH350.
I see it needs an adapter that bolts between trans and case.
If this is all true, its not too bad.

02-15-2022, 07:46 PM	#1
aperry Registered User Join Date: Jan 2010 Location: Mullica Hill Nj Posts: 2	69 Suburban convert to automatic What is involved drivetrain-wise in converting to automatic. 69 burb chassis under 67 C10 Last edited by LockDoc; 02-15-2022 at 10:40 PM.

02-15-2022, 08:23 PM	#2
richard2717 Equal opportunity joke ofender Join Date: Oct 2011 Location: Eastern Shore of MD Posts: 10,136	Re: 69 Suburban convert to automatic Would need clutch pedal assembly inside, frame bracket and pivot ball assembly for the side of the motor, Bell housing, Flywheel & Clutch Assembly. The auto trans cross member would have to be replaced along with what style transmission. The driveshaft may have to be changed as well __________________ Members I have met. Dually Jams, OlBlue60, ScottH, Tommyboy24, Dujobo, Warbucket, 2003 Silverado, Notsolo, my90k5, 6t727t2, Special-K ,Jack_71C10, tabarcus,72blazer_mud_bogger,pwdcougar,RSavage,EricSean,1Rippen6,invicta455,tennaragtop71,arks, Kendal,Bennett68C10, Perpendicular, Chainsawman, McGeesCustomMinis,ShortbedClayton,longblue72,6768chevylover,Tim71,Travisarmenta,Ol' Drippy,fleetmitch,georgieb51,Dave,bcnya2,Dadsburb https://paypal.me/6772GMtruckparts Most women like the strong, silent type… Fortunately for me, my wife prefers the out-of-shape, mouthy type.

02-16-2022, 12:41 AM	#4
53burb Senior Member Join Date: May 2004 Location: Queen Creek, AZ Posts: 1,010	Re: 69 Suburban convert to automatic Not difficult at all to do....many have done it...but this topic will get many more responses in the 67-72 pickup section....the suburbans and trucks are identical from the front seat to the front bumper and everything in between...except the front doors....

02-16-2022, 12:43 PM	#6
aperry Registered User Join Date: Jan 2010 Location: Mullica Hill Nj Posts: 2	Re: 69 Suburban convert to automatic Thanks for responses. Truck is in another location currently. I see I have to ID the transfer case. Maybe its a NP205? I know it has a low first gear, mostly unused. Then locate a short 4x4 tail shaft for TH350. I see it needs an adapter that bolts between trans and case. If this is all true, its not too bad.



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