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#1
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Transmission Shield
Hi: When is a Tranny shield needed? Just had the Firebird out and ran a 10:30 at 132 mph.
I installed a JW bellhousing on the TH400 this year so Flexplate area is done. Thanks Charles |
#2
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Pretty sure a tranny blanket is needed at the same time a 6pt roll bar is needed. 11.5 ET or something close to that
Sent from my SM-G965U using Tapatalk
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68 Firebird-- Street/Strip - 400/461 Eagle Forged Bottom End & Ross Flat top pistons. KRE 325 CFM D port, Ultradyne 263/271 @.050, .4267 lift. Crower Solid roller lifters and 1.65 stainless rockers. Quickfuel 1000 on Torker2 intake and 2" open spacer. Hedman 1.75" headers. TH400 w/brake. Ford 9" w/3.80 gears & 28x9 Hoosier pro bracket drag radial. Best ET: 1.35 60ft, 6.29 @ 107.20 mph, 9.99 @132.33 mph. 3,300 race weight |
#3
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Yes, trans shield required at 11.49 et same as a roll bar, harness and fire jacket.
More stuff required at 9.99 |
#4
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Quote:
Oh crap - really. And a trans shield meaning a blanket or shield over the case? |
#5
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Yes. From what what my understanding is now, you have to have a SFI Spec 30.1 bellhousing or a shield over the stock bellhousing. and a SFI spec 4.1 tranny blanket or Tranny shield. You can buy in two piece configuration or as a complete unit that bolts to belt housing. |
#6
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Quote:
Generally do they fit in a stock trans tunnel? |
#7
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Ok guys, Thanks I was under the impression it was needed at 10.99 to 9.99.
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#8
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I use a DJ Safety TH400 trans blanket, nice piece.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
#9
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Thanks AG, I'll check it out. Dam just ordered a starter from these guys a month ago.. Could have bought it then...
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#10
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U need a trans blanket at 10.99 I believe
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#11
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Ya that's pretty much what I have found out now. Have one on order now. Thanks for the info Darby.
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#12
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SFI SPECIFICATIONS
Mandatory at ET (or quicker) Item SFI Spec 13.99 Drive shaft loop (slicks) 13.99 Helmet (Snell K98+) 13.49 5-pt harness (convertible) 16.1 13.49 Approved rollbar (convertible) 13.49 (IHRA) Drive shaft loop (slicks) 11.49 Drive shaft loop (street tires) 11.49 Approved flywheel & clutch (manual transmission) 1.1, 1.2 11.49 Approved protective jacket 3.2A/1 11.49 Approved roll bar for all vehicles 11.49 Approved 5-pt harness 16.1 11.49 Approved flywheel shield (manual transmission) 6.1, 6.2 11.49 (IHRA) Approved mounted fire extinguisher 11.49 (IHRA) Approved flywheel shield (automatic transmission) 4.1 10.99* Approved roll cage (convertible) 10.99 Approved harmonic balancer 18.1 10.99 Approved aftermarket axles 10.99* Approved transmission shield (automatic transmission) 4.1 10.99 (IHRA) Competition License* Class D 9.99 Approved flexplate & shield (automatic transmission) 29.1, 30.1 9.99 Approved roll cage & window net* 27.1 9.99 Master cutoff switch 9.99 Competition License Class 4, Cat. C 9.99 Chassis Certification 9.99 Approved jacket/pants/neck collar/gloves* 3.2A/5, 3.3, 3.3/1 9.00 (IHRA) Roll cage & window net 8.99 (IHRA) Competition License Class C 8.49 On-board fire system 8.49 to 7.50 Chassis certification 25.4/25.5 (3600#) 7.99 (IHRA) Competition license Class B 7.49 & quicker Chassis certification 25.1E (2800#) 7.50 & slower Chassis certification 25.2 (3200#) 7.49 Competition license Class 3, Cat. C IHRA Pro Stock Competition license Class A 150mph + Parachute required 200 mph + Head & Neck Restraint required * Also required for 135 MPH or faster
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3 Generations of "Beach Boys Racing" ! Everybody knows somthin. Nobody knows everything ! 1st time on a dragstrip, 1964. Flagstart ! "Thanks for the entertainment." "Real Indians Don't Wear Bowties" |
#13
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#14
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Quote:
Thanks for the link Skip. It's too bad they don't make just the trans shield without the bell housing part. I've seen it in metal. |
#15
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Thanks Old Goat Racer for taking the time to post that info..
Charles |
#16
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I don't know. I installed a JW bellhousing when I built our TH400, so that takes care of the bellhouing area. J.W. bellhousing is spec 30.1 I just need a tranny shield. I ordered a blanket from Good Vibrations.
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#17
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CSR sheild fits in my 77 ta
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#18
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CSR fits my 79 Camaro IA fine. The hard part is getting those top bolts in ! Be nice if you could use the JB bellhousing and then section that part off the CSR shield for just the tight tranny part.
I did have to grind down some ribs on the case for it to fit. So how many of you all have had tech check for one? And if they checked date on it?
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
#19
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They always checked that I had one but never checked the date thank goodness. Pretty tough to read the sticker, you can just barely see it down in the tunnel.
Ears needed ground off my T400 for the shield to fit. |
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