Help with TH350. Short vs. Long Shaft - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DevinM · 07-12-2005, 09:49 PM

OK, I believe that my TH350 (which needs replacing due to it being blown) is a long shaft. Is this a common shaft (vs. a short shaft) for our trucks

I'm looking at an Ebay purchase CLICK HERE I don't think that I need a new converter, cause the one in my old tranny is hopefully good. Any thoughts folks?

Dean23 · 07-12-2005, 09:53 PM

go with the long shaft, short shaft trannies are for cars generally. unless of course you engine is sitting in the inline 6 position than the short shaft will work.

ALWAYA ALWAYS replace the converter.....if there are filings stuck in it they will get pumped from the converter directly into your new trans. unless you get the converter flushed out completely. just my 2 cents

Longhorn Man · 07-12-2005, 11:05 PM

these trucks came with short shaft trannys in the 69 - 782 equipped with the 350. I'm not sure if it was 73 or later when they moved to long shaft.
However, long shaft trannys are way more common and it makes it easier to do the one piece shaft everyone wants.
Other than that, there is no reason to use one over the other.

If your old tranny is junk, so is the converter.

da-burb · 07-12-2005, 11:13 PM

the short 6" tail is correct for this vintage.

Mixup · 07-13-2005, 11:15 AM

There are three 350 trans. 6"-9"-12"

07-12-2005, 09:49 PM	#1
DevinM Registered User Join Date: Jan 2002 Location: Deerfield, MA USA Posts: 198	Help with TH350. Short vs. Long Shaft OK, I believe that my TH350 (which needs replacing due to it being blown) is a long shaft. Is this a common shaft (vs. a short shaft) for our trucks I'm looking at an Ebay purchase CLICK HERE I don't think that I need a new converter, cause the one in my old tranny is hopefully good. Any thoughts folks? __________________ '71 Chevy C-10 - Current '62 Imapla SS - Traded for my current '73 Nova Hatch - traded for ATC-350X '73 Chevelle Deluxe - First car (R.I.P) DEERFIELD, MA

07-12-2005, 09:53 PM	#2
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	go with the long shaft, short shaft trannies are for cars generally. unless of course you engine is sitting in the inline 6 position than the short shaft will work. ALWAYA ALWAYS replace the converter.....if there are filings stuck in it they will get pumped from the converter directly into your new trans. unless you get the converter flushed out completely. just my 2 cents __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

07-12-2005, 11:13 PM	#4
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	the short 6" tail is correct for this vintage. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

07-13-2005, 11:15 AM	#5
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	There are three 350 trans. 6"-9"-12" __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

07-12-2005, 11:05 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	these trucks came with short shaft trannys in the 69 - 782 equipped with the 350. I'm not sure if it was 73 or later when they moved to long shaft. However, long shaft trannys are way more common and it makes it easier to do the one piece shaft everyone wants. Other than that, there is no reason to use one over the other. If your old tranny is junk, so is the converter.



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