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#1
12-15-2002, 08:59 AM
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Is there any real difference in the performance/reliability between a long and short shaft TH400 ???
Honest dad, that 455 on the side of the block is a serial number [img]/infopop/emoticons/icon_smile.gif[/img] [This message was edited by 67 455 Bird ragtop on December 15, 2002 at 11:18 AM.]
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#2
12-15-2002, 08:59 AM
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Is there any real difference in the performance/reliability between a long and short shaft TH400 ???
Honest dad, that 455 on the side of the block is a serial number [img]/infopop/emoticons/icon_smile.gif[/img] [This message was edited by 67 455 Bird ragtop on December 15, 2002 at 11:18 AM.]
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#3
12-15-2002, 10:37 AM
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No performance/reliability difference. The tailshaft length only determines which chassis they will fit and give the proper driveshaft angle. This is why you see the big Pontiacs with the long tail and the A and F-body cars with the short tail.
Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#4
12-16-2002, 05:44 AM
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Oh, ok thanks. So I guess not a good idea to put a long tail shaft in a 67 Firebird. How diff/expensive whould it be to change a long shaft to a short shaft ???
Honest dad, that 455 on the side of the block is a serial number [img]/infopop/emoticons/icon_smile.gif[/img]
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#5
12-18-2002, 04:08 PM
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b-man
Maybe I need to put a short tail TH400 in my '66 GTO. How can I tell the difference between a short or long shaft when rumaging around the salvage yard? Please be specific as I am new to this. Are there any other differences in the TH400's? Thanks Ken |
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#6
12-18-2002, 06:03 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by ThunderRoad:
b-man Maybe I need to put a short tail TH400 in my '66 GTO. How can I tell the difference between a short or long shaft when rumaging around the salvage yard? Please be specific as I am new to this. Are there any other differences in the TH400's? Thanks Ken<HR></BLOCKQUOTE> Not sure of the exact dimensions but the short shaft only has a short/stubby housing of a few inches. Say 4 -6. The long shaft shaft has a tail shaft housing of almost 12". They are very easy to tell apart even if you have never seen one before. Honest dad, that 455 on the side of the block is a serial number [img]/infopop/emoticons/icon_smile.gif[/img]
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#7
12-18-2002, 07:15 PM
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There are 3 different TH400 tail housing lengths:
Short housing - About 4-1/4" long that came in most compact, sport and some mid-size cars ('67 and later GTO and Firebird, '69 and later GP). Medium length housing - About 9-3/4" long. Used on some mid size and most full-size cars. Long housing - About 13-1/2" long. Used on Cadillacs and other long wheelbase full-size cars. I once used a 9-3/4" tailshaft TH400 out of a '74 Grandville in a '76 T/A. It seemed to work fine, but chances are that U-joint life would be shorter than if I used the proper short-tail tranny. [img]/infopop/emoticons/icon_wink.gif[/img] Let's go racing! www.outlawpontiacs.com/members/B-Man2.php www.outlawpontiacs.com/members/B-Man.php
__________________
1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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