Factory th400 transmission - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**dtkarst** · 09-27-2018, 07:27 PM

I’ve skimmed the posts on here about it but I was curious on whether or not a factory 400 transmission was available behind a factory 327 in a 1/2 ton pickup. Looking at one and was curious if it was possible in a 1/2 ton or if it was a 3/4 ton and up option. Gear indicator shows park R N D L1 L2. Just was curious on if possible and roughly an amount built with them. Thanks

**Captainfab** · 09-27-2018, 11:56 PM

I've never seen a factory installed TH400 in a C10, only in the C20's. But that doesn't mean it didn't happen.

**aotte1** · 09-28-2018, 03:01 AM

Reported here that it was a possible option. GM Heritage Center should provide an answer under vehicle kits. Will need to look 66’ with factory turbo 400, shift indicator. The one you reported, maybe for 67’ up trucks- not sure.

Les

LostMy65 · 09-28-2018, 10:57 AM

The guy here that had a factory roller cam most likely had a factory th400 in his c10.

vin63 · 09-28-2018, 05:35 PM

I think the TH400 was introduced in model year 1964 for Cadillac and Buick, then the following year for Olds and Pontiac. I don't think the TH400s were used in trucks until the 1970s.

**Captainfab** · 09-29-2018, 01:03 AM

I have seen a few '65-'66 C20's with TH400's from the factory. One was a '66 GMC that came from the factory with a V6 and TH400.

oem4me · 09-29-2018, 02:48 AM

For 1966, the three speed automatic was not listed as optional equipment for C10, as it was for C20.

vin63 · 09-29-2018, 08:46 AM

Yep, not in the half-ton/C10s until the '70s.

Quote:

Originally Posted by oem4me

For 1966, the three speed automatic was not listed as optional equipment for C10, as it was for C20.

Pontiacgurudan · 09-29-2018, 08:54 AM

Quote:

Originally Posted by LostMy65

The guy here that had a factory roller cam most likely had a factory th400 in his c10.

That's funny right there...

**The Rocknrod** · 09-29-2018, 03:31 PM

Quote:

Originally Posted by Pontiacgurudan

That's funny right there...

X2

**60-66** · 09-30-2018, 06:50 PM

1967 is the first TH400 in a C10 , not available in 66 for C10

09-27-2018, 07:27 PM	#1
dtkarst Senior Member Join Date: Nov 2010 Location: Hays, KS Posts: 2,490	Factory th400 transmission I’ve skimmed the posts on here about it but I was curious on whether or not a factory 400 transmission was available behind a factory 327 in a 1/2 ton pickup. Looking at one and was curious if it was possible in a 1/2 ton or if it was a 3/4 ton and up option. Gear indicator shows park R N D L1 L2. Just was curious on if possible and roughly an amount built with them. Thanks

09-27-2018, 11:56 PM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Factory th400 transmission I've never seen a factory installed TH400 in a C10, only in the C20's. But that doesn't mean it didn't happen. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

09-28-2018, 03:01 AM	#3
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	Re: Factory th400 transmission Reported here that it was a possible option. GM Heritage Center should provide an answer under vehicle kits. Will need to look 66’ with factory turbo 400, shift indicator. The one you reported, maybe for 67’ up trucks- not sure. Les

09-28-2018, 10:57 AM	#4
LostMy65 But Found Her 25yrs Later! Join Date: Oct 2010 Location: Oregon City, Oregon Posts: 10,530	Re: Factory th400 transmission The guy here that had a factory roller cam most likely had a factory th400 in his c10. __________________ I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035

09-28-2018, 05:35 PM	#5
vin63 It's Better With Nitro Join Date: Apr 2008 Location: Chino Hills, CA Posts: 2,262	Re: Factory th400 transmission I think the TH400 was introduced in model year 1964 for Cadillac and Buick, then the following year for Olds and Pontiac. I don't think the TH400s were used in trucks until the 1970s. __________________ 1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes

09-29-2018, 01:03 AM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Factory th400 transmission I have seen a few '65-'66 C20's with TH400's from the factory. One was a '66 GMC that came from the factory with a V6 and TH400. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

09-29-2018, 02:48 AM	#7
oem4me Registered User Join Date: Aug 2010 Location: Burbank CA Posts: 3,055	Re: Factory th400 transmission For 1966, the three speed automatic was not listed as optional equipment for C10, as it was for C20. Attached Images

09-30-2018, 06:50 PM	#11
60-66 Registered User Join Date: Apr 2012 Location: Wisconsin Posts: 3,329	Re: Factory th400 transmission 1967 is the first TH400 in a C10 , not available in 66 for C10 __________________ IS IT an EATON or Chevrolet rear axle https://67-72chevytrucks.com/vboard/...d.php?t=843778 The hubcap thread http://67-72chevytrucks.com/vboard/s...d.php?t=702839 WANTED : 1963-1966 6 Cylinder Fan Shroud WANTED :1964-1966 PANEL TRUCK



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