I need some info.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

My75Shorty · 01-28-2007, 02:20 AM

Hello,
I have searched the site for 1975 shortbox 6cyl 3speed to TH350 swap. I have only found info about pre 73 swaps. I am keeping the 6cyl BTW

I need to know these things:

1. Do I need to change the starter and flywheel?

2. I have the TH350 that is 27.5" long, anyone know if I need to change the driveline?

3. I have the auto/tilt column already.

4. is there anything I have overlooked?

thank you
Mike

rcbildr · 01-28-2007, 03:41 AM

I lived in Yakima for a while. That place sure has changed since I was there...moved out in 87.

Going from a manual to an automatic, you have to change the flywheel over to a flexplate. I think you will have to change the starter too, something about the way they bolt on is different but I'm not really sure on that. When I did a conversion on my diesel burb (auto to manual) I had to change starters, not because of the way they bolted on, but because of the difference in thickness of the flywheel and flexplate.

I'm not sure on the lenght of the transmission, probably would be best to go out and measure what's in the truck and compare. One thing you might have a problem with is the output of the transmission. Somebody correct me if I'm wrong, but the TH-350 you have may be set up for a slip yoke and the 3 speed isn't. Hope this helps.

My75Shorty · 01-28-2007, 06:04 AM

Hi rcbildr,
Thank you for the information! Yakima sure has changed, I grew up here in the valley. Hope to chat in the future.
Mike

tyjoja · 01-28-2007, 09:20 PM

Hey, does your six cyl have power steering? I'm having trouble finding the power steering brackets for my 73, thanks

My75Shorty · 02-03-2007, 04:27 AM

Hi Tyjoja,
No my truck does not have power steering, sorry. If it did, I would have been happy to snap some pics though.

01-28-2007, 02:20 AM	#1
My75Shorty Registered User Join Date: Oct 2006 Location: Yakima,wa Posts: 7	I need some info.... Hello, I have searched the site for 1975 shortbox 6cyl 3speed to TH350 swap. I have only found info about pre 73 swaps. I am keeping the 6cyl BTW I need to know these things: 1. Do I need to change the starter and flywheel? 2. I have the TH350 that is 27.5" long, anyone know if I need to change the driveline? 3. I have the auto/tilt column already. 4. is there anything I have overlooked? thank you Mike __________________ 1975 Chevy Shortbox 250 6cyl 3 speed manual rusty but runs, lol.

01-28-2007, 03:41 AM	#2
rcbildr Registered User Join Date: Sep 2000 Location: Gold Bar, WA Posts: 1,216	Re: I need some info.... I lived in Yakima for a while. That place sure has changed since I was there...moved out in 87. Going from a manual to an automatic, you have to change the flywheel over to a flexplate. I think you will have to change the starter too, something about the way they bolt on is different but I'm not really sure on that. When I did a conversion on my diesel burb (auto to manual) I had to change starters, not because of the way they bolted on, but because of the difference in thickness of the flywheel and flexplate. I'm not sure on the lenght of the transmission, probably would be best to go out and measure what's in the truck and compare. One thing you might have a problem with is the output of the transmission. Somebody correct me if I'm wrong, but the TH-350 you have may be set up for a slip yoke and the 3 speed isn't. Hope this helps. __________________ My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28

01-28-2007, 06:04 AM	#3
My75Shorty Registered User Join Date: Oct 2006 Location: Yakima,wa Posts: 7	Re: I need some info.... Hi rcbildr, Thank you for the information! Yakima sure has changed, I grew up here in the valley. Hope to chat in the future. Mike __________________ 1975 Chevy Shortbox 250 6cyl 3 speed manual rusty but runs, lol. Last edited by My75Shorty; 01-28-2007 at 06:04 AM.

01-28-2007, 09:20 PM	#4
tyjoja Registered User Join Date: Jan 2007 Location: albany oregon Posts: 168	Re: I need some info.... Hey, does your six cyl have power steering? I'm having trouble finding the power steering brackets for my 73, thanks

02-03-2007, 04:27 AM	#5
My75Shorty Registered User Join Date: Oct 2006 Location: Yakima,wa Posts: 7	Re: I need some info.... Hi Tyjoja, No my truck does not have power steering, sorry. If it did, I would have been happy to snap some pics though. __________________ 1975 Chevy Shortbox 250 6cyl 3 speed manual rusty but runs, lol.



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