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Tx Firefighter · 11-14-2009, 09:29 PM

There are 3 different lengths of TH350s. The 6 inch, 9 inch, and 12 inch (very uncommon to find).

Your early truck would have had a 6 inch unit. The later model would have had the 9 inch (same length as a 700R4, not coincidentally). I swapped many, many burnt up 700R4s for straight 9 inch TH350s and my money says someone has done exactly that to your 86 model donor. The OD fails and people go to the TH350 for reliability and lower repair cost.

11-14-2009, 09:29 PM	#2
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Turbo 350 Tailshaft question There are 3 different lengths of TH350s. The 6 inch, 9 inch, and 12 inch (very uncommon to find). Your early truck would have had a 6 inch unit. The later model would have had the 9 inch (same length as a 700R4, not coincidentally). I swapped many, many burnt up 700R4s for straight 9 inch TH350s and my money says someone has done exactly that to your 86 model donor. The OD fails and people go to the TH350 for reliability and lower repair cost. __________________ I'm on the Instagram- @Gearhead_Kevin Last edited by Tx Firefighter; 11-14-2009 at 09:30 PM.