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#1
12-12-2022, 10:03 PM
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67-70 TH400 "PQ" transmission
I'm on the hunt for a turbo 400 transmission with a "PQ" on the data plate for my 69TA.
I have a date correct 1969 "PQ" case but unfortunately somewhere along the line the valve body was swapped out. So.. what really I need is the valve body itself but will buy the whole trans to get it. 1967-1970 PQ transmissions used the same valve body so any of these years will work. Please PM me or send me an e-mail if you have one and are willing to part with it. Regards, Rob Jackson raj7395@sbcglobal.net
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1969 TA RAIII M40 Auto Cameo White/ Std Blue Int 1970 TA RAIII M21 4-spd Lucy Blue/Std Black Int 1971 TA 455 HO M22 4-Spd Lucy Blue/Deluxe White Int |
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#2
12-16-2022, 08:13 AM
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Do you know if there is any numbers on the valve body to identify it as to the years your looking for. ?
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick. Best so far 10.12@133 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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#3
12-16-2022, 01:18 PM
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I didn’t realize PQ trans had a special valve body? I have a 70 400 out of a GP that’s been stored inside for the last 30 years if that would help at all.
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#4
12-16-2022, 11:51 PM
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Great question.
The production valve bodies all have a one inch tall yellow identifier code painted on the the valve body accumulator boss. The 67-70 "PQ" high performance TH400 transmission valve body that I'm searching for is code "AK-1". \ 1967 "PX" transmissions also have the AK-1 valve body that I need. Mine is a "R-3" indicating that it was swapped out at some point. My 69 "PX" transmission has a code "1P". Rob
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1969 TA RAIII M40 Auto Cameo White/ Std Blue Int 1970 TA RAIII M21 4-spd Lucy Blue/Std Black Int 1971 TA 455 HO M22 4-Spd Lucy Blue/Deluxe White Int Last edited by RAJ7395; 12-17-2022 at 12:04 AM. |
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#5
12-17-2022, 12:35 AM
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The TH400 cast valve body itself is used in multiple applications.
What makes each valve body code different is the formula of springs, orifices, control spools, etc, that go together to produce the desired performance qualities. I haven't found a parts diagram that breaks down the unique combination of these internal parts by part number so I can duplicate it. If anyone has that breakdown I'd be grateful if you'd share it with me for valve body part number 862-5784.
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1969 TA RAIII M40 Auto Cameo White/ Std Blue Int 1970 TA RAIII M21 4-spd Lucy Blue/Std Black Int 1971 TA 455 HO M22 4-Spd Lucy Blue/Deluxe White Int |
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#6
12-17-2022, 12:46 AM
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little info. Sorry it's sideways
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick. Best so far 10.12@133 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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#7
12-17-2022, 01:01 AM
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few more pics
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick. Best so far 10.12@133 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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