3 speed to th350 swap? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

humanspeeddemon · 11-05-2007, 06:21 PM

Hi, Ive got a 3 speed and I want to convert it to a th350. Ive got the trans but can anyone tell me what else i need.Ive found a rear trans crossmember but thats all ive found. Any advice would help me .thanks.

nplocoman · 11-05-2007, 07:03 PM

Steering column all linkages and drive shaft and a flexplate. Those are a good start!

ante_up13 · 11-05-2007, 07:10 PM

convert from a 3 speed to a 3 speed?

humanspeeddemon · 11-05-2007, 08:12 PM

I know its sorta assinine but its all i have in a pinch. Im just trying to get through the winter as cheaply as possable.

Anyway I have flexplate,torque converter,trans,kickdown cable,and the drive shaft is a stock 2 piece.

did thay ever install a th350 and is the driveshaft different thay my man 3 speed?

nplocoman · 11-06-2007, 07:45 PM

You have a good start. I think that the drive line is a different length. The section from the rear of the auto is different from the 3 sp.

Tx Firefighter · 11-06-2007, 08:20 PM

Starter nosecone and starter mounting bolts too, or a different starter if you're not comfortable taking your old starter apart to swap the nosecone.

Cyclone44 · 11-06-2007, 08:24 PM

The Radiator is different too......George

1969k10stepside · 11-06-2007, 08:33 PM

Or just get a aftermarket tranny cooler like I did...dont forget the tranny cooler lines.You need the column,linkages,frame bracket,tranny,crossmember I believe,driveshaft maybe,flexplate,torque convertor,starter,aftermarket cooler or swap to a auto tranny style radiator,tranny cooler lines...I think that is most of everything.I have most of the parts you need down here,but that's a pretty good drive from where you are.

ante_up13 · 11-07-2007, 12:20 AM

Quote:

Originally Posted by humanspeeddemon

I know its sorta assinine but its all i have in a pinch. Im just trying to get through the winter as cheaply as possable.

Anyway I have flexplate,torque converter,trans,kickdown cable,and the drive shaft is a stock 2 piece.

did thay ever install a th350 and is the driveshaft different thay my man 3 speed?

I was just curious...hey, whatever you need to do to keep that rig on the road! Good luck!

**WorkinLonghorn** · 11-07-2007, 01:03 AM

Modulator line.

chris71 · 11-07-2007, 10:55 AM

if you are on a budget and in a jam, i would probably got to a yard and try to find all this stuff for a 67-72 truck, if not, i would pull some sort of floor shift and linkage from maybe a 82-92 camaro or other car, this would save you from buying a column and linkage. i would even get the modulator vaccum line and trans lines from a yard , if they are the wrong size you can bend them. get as much stuff from the yard as you can if you are in a bind. i would reccomend you try to get the correct 67-72 parts first, as it will be easier to make the swap with less modifictaions and jurry rigging. with the correct stuff, the truck will have a higher resale value as well. whatever you do , good luck

11-05-2007, 06:21 PM	#1
humanspeeddemon Registered User Join Date: Jul 2007 Location: LaPorte,IN Posts: 5	3 speed to th350 swap? Hi, Ive got a 3 speed and I want to convert it to a th350. Ive got the trans but can anyone tell me what else i need.Ive found a rear trans crossmember but thats all ive found. Any advice would help me .thanks.

11-05-2007, 07:03 PM	#2
nplocoman never finish start another Join Date: Mar 2007 Location: North Platte Nebraska Posts: 432	Re: 3 speed to th350 swap? Steering column all linkages and drive shaft and a flexplate. Those are a good start!

11-05-2007, 07:10 PM	#3
ante_up13 Registered User Join Date: May 2004 Location: Here Posts: 167	Re: 3 speed to th350 swap? convert from a 3 speed to a 3 speed?

11-05-2007, 08:12 PM	#4
humanspeeddemon Registered User Join Date: Jul 2007 Location: LaPorte,IN Posts: 5	Re: 3 speed to th350 swap? I know its sorta assinine but its all i have in a pinch. Im just trying to get through the winter as cheaply as possable. Anyway I have flexplate,torque converter,trans,kickdown cable,and the drive shaft is a stock 2 piece. did thay ever install a th350 and is the driveshaft different thay my man 3 speed?

11-06-2007, 07:45 PM	#5
nplocoman never finish start another Join Date: Mar 2007 Location: North Platte Nebraska Posts: 432	Re: 3 speed to th350 swap? You have a good start. I think that the drive line is a different length. The section from the rear of the auto is different from the 3 sp.

11-06-2007, 08:20 PM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 3 speed to th350 swap? Starter nosecone and starter mounting bolts too, or a different starter if you're not comfortable taking your old starter apart to swap the nosecone. __________________ I'm on the Instagram- @Gearhead_Kevin

11-06-2007, 08:24 PM	#7
Cyclone44 Step Brother Join Date: Sep 2007 Location: K-town Posts: 4,029	Re: 3 speed to th350 swap? The Radiator is different too......George

11-06-2007, 08:33 PM	#8
1969k10stepside Registered User Join Date: Mar 2006 Location: USA Posts: 21,020	Re: 3 speed to th350 swap? Or just get a aftermarket tranny cooler like I did...dont forget the tranny cooler lines.You need the column,linkages,frame bracket,tranny,crossmember I believe,driveshaft maybe,flexplate,torque convertor,starter,aftermarket cooler or swap to a auto tranny style radiator,tranny cooler lines...I think that is most of everything.I have most of the parts you need down here,but that's a pretty good drive from where you are. Last edited by 1969k10stepside; 11-06-2007 at 08:39 PM.

11-07-2007, 01:03 AM	#10
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,861	Re: 3 speed to th350 swap? Modulator line. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, 2nd owner, Work-Truck supreme. Best $300 I ever spent.

11-07-2007, 10:55 AM	#11
chris71 Registered User Join Date: Oct 2007 Location: Sykesville MD Posts: 357	Re: 3 speed to th350 swap? if you are on a budget and in a jam, i would probably got to a yard and try to find all this stuff for a 67-72 truck, if not, i would pull some sort of floor shift and linkage from maybe a 82-92 camaro or other car, this would save you from buying a column and linkage. i would even get the modulator vaccum line and trans lines from a yard , if they are the wrong size you can bend them. get as much stuff from the yard as you can if you are in a bind. i would reccomend you try to get the correct 67-72 parts first, as it will be easier to make the swap with less modifictaions and jurry rigging. with the correct stuff, the truck will have a higher resale value as well. whatever you do , good luck __________________ '55 3100 2nd series short-bed stepside '70 Corvette coupe stingray '71 Chevelle 2-dr coupe SS clone '71 C10 long-bed fleetside '83 long-haired brunette wife



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