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#1 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,877
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Straight swap..turbo 350 for turbo 350...not????
Today we were supposed to do an engine/trans swap on my oldest sons 1972 burb, 350/350 combo. I purchased a 350/350 combo from a board member that was previously in a lwb pickup. Engine in very nice shape, trans recently rebuilt.
We moved all the air con stuff to the side, pulled off all the rest of the crap that would be in the way. Sawzall off the old exhaust (have all new to put in). Engine and trans come out with no problems. Cleaned and power washed all the dirt and grease off the burb, we even cleaned off the bird doo..(If you saw the post on that you know what Im talking about) We start installing the new engine/trans and I noticed the tail shaft on the newer one is longer than the one we pulled out, by about 3inches. Aren't the lwb truck and burb the same wheelbase? Dont they both have the double drive shafts? What the heck am I supposed to do to make this fit? I really don't want to spend anymore money in this project. I was sure this was a straight swap. Any help would be appreciated. Mark Last edited by CG; 07-22-2007 at 08:14 PM. |
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#2 |
Senior Member
Join Date: Mar 2004
Location: Nebraska
Posts: 583
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Re: Straight swap..turbo 350 for turbo 350...not????
one must be a long tail shaft and the other a short. wether or not you can change the tailshafts i don't no. if it were me i would undo the yoke from the driveshaft stick the yoke in the tail shaft and pull out 1/2 to 3/4 of an inch then messure from u joint to u joint and have your local machine shop shorten the driveshaft. that is if u cant swap tail shaft.
Last edited by 57sailplane; 07-22-2007 at 08:25 PM. |
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#3 | |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,877
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Re: Straight swap..turbo 350 for turbo 350...not????
Quote:
Yes one is long and one is short...yes I can have the shaft redone (pain in the rear and extra money) I pulled the tail shaft off the old trans. Its not just a matter of swapping em from what I saw. I'm really confused why two lengths on the tranny tail shafts when the trucks are the same wheel base. Im going to PM the member I picked this up from and see if he still has the drive shafts. |
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#4 |
Designated A-hole!
Join Date: Mar 2003
Location: South Mississippi
Posts: 36,450
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Re: Straight swap..turbo 350 for turbo 350...not????
73 and up had a 9" tailshaft, 67-72 had 6" tailshafts. Easiest thing to do is shorten the driveshaft (swapping tailshafts won't work). Look on the bright side, the 350 w/9" tailshaft is the same length as a 700-R4.
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"If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. ![]() We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck" |
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#5 |
ran out of money
Join Date: Apr 2003
Location: northern, NJ
Posts: 925
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Re: Straight swap..turbo 350 for turbo 350...not????
cars also got the 6 inch shaft. if you bring it to a local trans shop its actually easy to pull it out and swap tailshafts and housings. just a snap ring hold them in once you removed the pump,drums, and hubs and other goodies. the 6inch is actually a more desirable length but the 9 inch is 1/16 difference in length from a 700r4
hope that helps out.
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Modify everything, leave nothing alone!~ ![]() ![]() |
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#6 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,877
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Re: Straight swap..turbo 350 for turbo 350...not????
So if I end up having to take the drive shaft in do I tell em to whack off 3 inches since the tail shaft is 3 inches longer than the one that was in there....or is there more to it than that?
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#7 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,877
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Re: Straight swap..turbo 350 for turbo 350...not????
Bumpity
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#8 | |
Senior Member
![]() Join Date: Jan 2005
Location: Claremore, OK 74017
Posts: 2,640
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Re: Straight swap..turbo 350 for turbo 350...not????
Quote:
1. Get a shorter tail shaft 2. Shorten the drive shaft.
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68 Short Stepside C-10 69 SWB C-10 70 Flatbed C-20 70 LWB C-20 BB402 70 LWB C-10 CST 70 LWB C-10 CST 71 Short Stepside Cheyenne C-10 72 LWB C-10 72 Blazer 4x4 4spd 95 Jeep Cherokee 4x4 |
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#9 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,877
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Re: Straight swap..turbo 350 for turbo 350...not????
Taking the tranny in and swapping tail shafts is not going to work for me. The drive shaft solution is the easiest and best one for me. Ill call Drive Shafts NW and see what I need to do. Thanks guys.
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