did the th400 metric trannies have a lockup verter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cableguy0 · 02-03-2003, 07:00 PM

i need to know whether or not all the th400 metris=c trannies have a lockup converter or not and how to tell if they do or dont.

crazy longhorn · 02-03-2003, 07:35 PM

I dont know of any 400 turbos with lock up converter. some of the 350 turbos did have a lock up (350C)....crazyL

cableguy0 · 02-03-2003, 07:42 PM

ok i was asking because i know a lot of the metric 350's had a lockup verter and a friend was asking about a 400 hes going to use in his chevy.thank u

Longhorn Man · 02-04-2003, 12:23 AM

Never heard of a metric 350 or 400....the 200 was refered to as a metric though.
If it actually has a desicnation od C after the name, then it is in fack a lock up tranny... But I'm with crazy Al on this...never heard of a lock up 400.
lock up isn't all ppl make it out to be. 200 RPM drop is not much. Just enough to hear and to take away the torque.

cableguy0 · 02-04-2003, 01:09 AM

i dont too much care for the lockup myself but the pan says metric on it and the tranny is from an 82 i believe i was just asking for a buddy

86k10 · 02-04-2003, 01:50 AM

I'm with the others, I've never heard of a metric 350 or 400, if it says metric on the pan then it's probably a 200 or a 2004R. Myself i don't mind the lockup, course I have mine fixed so I can shut it off if I want and then for road driving kick it back on, cause when a lockup up convertor is unlocked they generate imense heat and fast. i suppose all you Chevy guys will hate me when you find out that as my name says 86K10 is powered by a 7.5L
Oldsmobile. Hey at least it's GM. And it was just an experiment I've always wanted to try. It worked out quite well, now that it has been changed from 3:08 to 4:10 gears and a 69 C20 rear axle with detroit locker, it's a regular powerhouse and still only runs 2200 RPM at 75MPH.

Jwill41 · 02-04-2003, 09:39 AM

I am running a 700r4 without the lockup in my 68. I am not sure of the rear end gears but it works great.

ckhd · 02-04-2003, 10:13 AM

I just looked at several transmission sites on the internet. They all list T-350s w/ lockup and without lockups, but none mention lockup at all for the 400s. Judging from that, my bet would be that there are not any T-400 lockup transmissions.

Low67C10 · 02-05-2003, 12:22 AM

Ive often wondered if a switch-pitch pump/front support could be modified to work a lock-up convertor.

Longhorn Man · 02-06-2003, 12:25 AM

If memory serves, you need a special verter to run switch pitch.

02-03-2003, 07:00 PM	#1
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	did the th400 metric trannies have a lockup verter i need to know whether or not all the th400 metris=c trannies have a lockup converter or not and how to tell if they do or dont. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-03-2003, 07:35 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,403	I dont know of any 400 turbos with lock up converter. some of the 350 turbos did have a lock up (350C)....crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

02-03-2003, 07:42 PM	#3
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	ok i was asking because i know a lot of the metric 350's had a lockup verter and a friend was asking about a 400 hes going to use in his chevy.thank u __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-04-2003, 01:09 AM	#5
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	i dont too much care for the lockup myself but the pan says metric on it and the tranny is from an 82 i believe i was just asking for a buddy __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

02-04-2003, 01:50 AM	#6
86k10 Registered User Join Date: Feb 2003 Location: Bertrand, Nebraska Posts: 355	metric or not I'm with the others, I've never heard of a metric 350 or 400, if it says metric on the pan then it's probably a 200 or a 2004R. Myself i don't mind the lockup, course I have mine fixed so I can shut it off if I want and then for road driving kick it back on, cause when a lockup up convertor is unlocked they generate imense heat and fast. i suppose all you Chevy guys will hate me when you find out that as my name says 86K10 is powered by a 7.5L Oldsmobile. Hey at least it's GM. And it was just an experiment I've always wanted to try. It worked out quite well, now that it has been changed from 3:08 to 4:10 gears and a 69 C20 rear axle with detroit locker, it's a regular powerhouse and still only runs 2200 RPM at 75MPH.

02-04-2003, 12:23 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Never heard of a metric 350 or 400....the 200 was refered to as a metric though. If it actually has a desicnation od C after the name, then it is in fack a lock up tranny... But I'm with crazy Al on this...never heard of a lock up 400. lock up isn't all ppl make it out to be. 200 RPM drop is not much. Just enough to hear and to take away the torque.

02-04-2003, 09:39 AM	#7
Jwill41 Registered User Join Date: Aug 2002 Location: Farmers Branch, Tx Posts: 1,009	I am running a 700r4 without the lockup in my 68. I am not sure of the rear end gears but it works great. __________________ http://www.picturetrail.com/jwill41 67 1/2 ton GMC short step side 68 1/2 ton Chevy long fleet side 72 1/2 ton Chevy Suburban 99 1/2 ton Chevy Suburban founder (and only member) of the primer/clearcoat club

02-04-2003, 10:13 AM	#8
ckhd Registered User Join Date: Oct 2000 Location: St. Johns, Arizona Posts: 2,660	I just looked at several transmission sites on the internet. They all list T-350s w/ lockup and without lockups, but none mention lockup at all for the 400s. Judging from that, my bet would be that there are not any T-400 lockup transmissions. __________________ my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans?

02-05-2003, 12:22 AM	#9
Low67C10 Registered User Join Date: May 2002 Location: Southern California Posts: 66	Ive often wondered if a switch-pitch pump/front support could be modified to work a lock-up convertor.

02-06-2003, 12:25 AM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	If memory serves, you need a special verter to run switch pitch.



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