tranny swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

scooby3242 · 09-16-2005, 11:48 AM

Im wanting to swap my saginaw 3 speed out for a th350. I have a 71 chevy long bed with a 350 motor. I need to know what parts I need. Here is what I have come up with so far....
(1)Tranny...th350 with 6 inch tail (should swap out with out any driveshaft issues right?)
(2) auto transmission cross bar (3)transmission mounts (4) a shifter (5) kick down cable (6) transmission cooler (no idea which one, too many options.
(7) torque converter ( not sure which one, stock one would be fine, maybe 2000 stall) (8) and a flywheel (are all flywheels the same, i think there were one and two piece ones, what is the difference)

Putter · 09-16-2005, 12:06 PM

9)Something to plug the hole in the firewall where the clutch linkage used to pass through.

scooby3242 · 09-16-2005, 01:52 PM

What brand of transmission cooler? and what size? Is a frame mount a good one? Also I am clueless when it comes to flywheels. any suggestions there?

**VetteVet** · 09-16-2005, 02:59 PM

Hi Scooby
You have a pretty good idea of stuff you need. I am not sure if the driveshaft yoke is the same spline for an automatic tailshaft as it is for a manual so you might have to change the yoke. Don't quote me on that though It's been awhile since I worked on stickshifts.
I'd give some thought on a radiator with a trans cooler built in AKA stock. Then if you wanted to add an auxillary one you could.
Are you going to use a floor shifter or change the column?
The clutch pedal needs to come out but save all the parts for the manual linkage cause someone on the boards is always looking for some.
The clutch and flywheel will need to be changed out for a flexplate. with 168 teeth IIRC. I think you'l be happy with a 2000 stall converter but if you can find one a stock one will work fine. You may have some problems with the starter/flexplate mesh so shimming may be necessary.
Here's a flexplate Pic ---------- Good luck

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**tnblazerk5** · 09-16-2005, 03:34 PM

you also need to make sure you take out the sleave out of the end of the crankshaft

09-16-2005, 11:48 AM	#1
scooby3242 Registered User Join Date: Apr 2005 Location: Bedford, Tx Posts: 40	tranny swap Im wanting to swap my saginaw 3 speed out for a th350. I have a 71 chevy long bed with a 350 motor. I need to know what parts I need. Here is what I have come up with so far.... (1)Tranny...th350 with 6 inch tail (should swap out with out any driveshaft issues right?) (2) auto transmission cross bar (3)transmission mounts (4) a shifter (5) kick down cable (6) transmission cooler (no idea which one, too many options. (7) torque converter ( not sure which one, stock one would be fine, maybe 2000 stall) (8) and a flywheel (are all flywheels the same, i think there were one and two piece ones, what is the difference) __________________ 1973 gmc swb

09-16-2005, 12:06 PM	#2
Putter More Cowbell.... Join Date: Mar 2004 Location: Puckett, MS Posts: 3,569	9)Something to plug the hole in the firewall where the clutch linkage used to pass through. __________________ *There once was a member from Puckett.....Who ( fill in the blank blank blank* ) bucket** Last edited by Putter; 09-16-2005 at 12:06 PM.

09-16-2005, 01:52 PM	#3
scooby3242 Registered User Join Date: Apr 2005 Location: Bedford, Tx Posts: 40	What brand of transmission cooler? and what size? Is a frame mount a good one? Also I am clueless when it comes to flywheels. any suggestions there? __________________ 1973 gmc swb

09-16-2005, 02:59 PM	#4
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,714	th350 swap Hi Scooby You have a pretty good idea of stuff you need. I am not sure if the driveshaft yoke is the same spline for an automatic tailshaft as it is for a manual so you might have to change the yoke. Don't quote me on that though It's been awhile since I worked on stickshifts. I'd give some thought on a radiator with a trans cooler built in AKA stock. Then if you wanted to add an auxillary one you could. Are you going to use a floor shifter or change the column? The clutch pedal needs to come out but save all the parts for the manual linkage cause someone on the boards is always looking for some. The clutch and flywheel will need to be changed out for a flexplate. with 168 teeth IIRC. I think you'l be happy with a 2000 stall converter but if you can find one a stock one will work fine. You may have some problems with the starter/flexplate mesh so shimming may be necessary. Here's a flexplate Pic ---------- Good luck --------------------------------------------------------------- __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. Last edited by VetteVet; 08-30-2010 at 08:15 AM.

09-16-2005, 03:34 PM	#5
tnblazerk5 User #12137 Join Date: Apr 2004 Location: kingsport,upper east tenn Posts: 11,598	you also need to make sure you take out the sleave out of the end of the crankshaft



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