3+3 question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chevy72402 · 03-30-2003, 10:37 PM

My friend has a 1976 3+3 with a 350 engine, on the option sheet it says that it has a hydromatic ( I think) it only has D 2 1 on the tranny, Please help ID the tranny. Thanks

c10scotty · 03-30-2003, 11:14 PM

its either a th350 or th400

gchemist · 03-31-2003, 01:32 AM

What does the tranny pan look like?
Square with a corner cut off - 350TH.
Pretty much not straight and looks like an island - 400th.

bpmcgee · 03-31-2003, 01:39 AM

On a 350 wouldn't it almost certainly be a TH350?

I thought TH400's were only used with 454's and c20's etc.

low 84 · 03-31-2003, 01:45 AM

Quote:

Originally posted by bpmcgee
On a 350 wouldn't it almost certainly be a TH350?

I thought TH400's were only used with 454's and c20's etc.

nope, member 85cruiser has a 350/th400 in his 3/4 ton. and anything could have been swaped out in the past 25 years

*1FaastC10* · 03-31-2003, 01:54 AM

Quote:

Originally posted by bpmcgee
On a 350 wouldn't it almost certainly be a TH350?

I thought TH400's were only used with 454's and c20's etc.

if it is a 3+3, it is certainly either a C/K 20 or 30, so it could very well be a TH 400.

MSL · 03-31-2003, 04:00 AM

Oh a hydromatic i think it looks like a th350 but its slightly different. i have heard of the and heard they where not all that good.

RockHQ · 03-31-2003, 09:36 AM

....but TH350, TH400 and TH700-4R for example are all really Turbo HydraMatics, or THM-xxx. I dunno if that's what you meant?

03-30-2003, 10:37 PM	#1
chevy72402 FARMER/RANCHER Join Date: Apr 2001 Location: SD Posts: 597	3+3 question My friend has a 1976 3+3 with a 350 engine, on the option sheet it says that it has a hydromatic ( I think) it only has D 2 1 on the tranny, Please help ID the tranny. Thanks __________________ 1972 chevy super, long box, 402 big block (2,000 miles on rebuild) 2wd tach, tilt, tool box on bedside, a/c, sliding rear window, orange and white. 1972 Chevy Blazer 2wd, tach, tilt, a/c, my first engine overhauling experience, Orange, with white top 2006 Gmc Sierra, XM, Z-71, dark blue, onstar, leather, rear entertainment (audio only) heated seats, (the wife loves that feature) upgraded tires immediately after purchase to Goodyear Wrangler AT/S (hate those rock throwers that come from the factory) BWC

03-30-2003, 11:14 PM	#2
c10scotty ~THE SILVER BULLET~ Join Date: Oct 2002 Location: WYOMING Posts: 285	its either a th350 or th400 __________________ ~1980 c10 chevy scottsdale~ ~2.5/4 drop 305/th350c~

03-31-2003, 01:32 AM	#3
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	What does the tranny pan look like? Square with a corner cut off - 350TH. Pretty much not straight and looks like an island - 400th. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

03-31-2003, 09:36 AM	#8
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	....but TH350, TH400 and TH700-4R for example are all really Turbo HydraMatics, or THM-xxx. I dunno if that's what you meant? __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild

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03-31-2003, 01:39 AM	#4
bpmcgee Registered User Join Date: Mar 2003 Location: Northern Illinois Posts: 2,181	On a 350 wouldn't it almost certainly be a TH350? I thought TH400's were only used with 454's and c20's etc.

03-31-2003, 04:00 AM	#7
MSL Registered User Join Date: Mar 2003 Location: So.Oregon Posts: 765	Oh a hydromatic i think it looks like a th350 but its slightly different. i have heard of the and heard they where not all that good.



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