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| | | Forums66 Topics128,143 Posts1,056,786 Members48,454 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#33909 09/25/2003 12:14 AM | Joined: Sep 2003 Posts: 82 Member | | Member Joined: Sep 2003 Posts: 82 | HOw can you tell the difference between a 350 turbo and a 400 turbo? Trying to identify a transmission.
Thanks | | |
#33910 09/25/2003 2:10 AM | Joined: Apr 2003 Posts: 140 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2003 Posts: 140 | Pans on the bottom are different. Look at a pan gasket for each, or a service manual.
George | | |
#33911 09/25/2003 3:20 AM | Joined: Sep 2003 Posts: 37 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 37 | The pan on the TH-400 reminds me of the State of Texas. Also don't take this as gospel (as apparently my mechanic buddy with 20yrs in says he's seen different), but on my junk the 400 has the vacuum modulator on the right side close to the bellhousing just above the pan, and the 350 has it on the rear facing the driveshaft. Jim. | | |
#33912 09/25/2003 3:21 AM | Joined: Oct 2001 Posts: 194 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2001 Posts: 194 | 350 has an almost square pan with one corner cut off. | | |
#33913 09/25/2003 3:29 AM | Joined: Sep 2003 Posts: 82 Member | | Member Joined: Sep 2003 Posts: 82 | Ok mine has 2 sqares cut off. I was just under there. | | |
#33914 09/25/2003 3:39 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Click on the trannies on the Nowak tranny page . It shows the pan patterns.
Fred 52 3600 69 C-10
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#33915 09/25/2003 7:55 PM | Joined: Aug 2003 Posts: 264 Member | | Member Joined: Aug 2003 Posts: 264 | The TH-400 also has a different driveshaft connection...Th-350 slides in on a splined shaft, the 400 has half of the front joint bolted to the trans output shaft.
If you are so inclined, the TH-700 has a square pan. If you are switching to an automatic and have the stock rear-end, I'd recommend this transmission because of the overdrive and lock-up converter. | | |
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