CLASS RACER FORUM - flexplates

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Orlando race coming soon, everyone of you stock/superstock cars have your new sfi flexplates ready for inspection?

I just put a new one in my car. The old one had gone out of date. They might be checking that at the first fee events. One year they were jacking up the cars and checking. I have pictures of all my certifications on my phone

I recommend taking pictures of all your SFI labels.

Got mine for my build in the mail a few weeks ago. Y'all have preferences? I just got the el-cheapo sfi certified one from Jegs given I'm not trying to rotate the Earth. I've had no issues on my .90 stuff with them too but some people swear by particular brands.

Quote:

Originally Posted by JP1738 (Post 692032)

I have used the Summit and Pioneer ones and haven’t had a problem. One had some chipping on the teeth after several years. Still worked when I removed it. This go around I bought one from ATI. The quality is much better. Thicker steel and the ring gear is Tig welded at closer intervals.

New ATI for the Camaro. Can't find a shield for a T350 (None in stock).

Quote:

Originally Posted by ZenzenRacing (Post 692038)

New ATI for the Camaro. Can't find a shield for a T350 (None in stock).

I put a TCI shield on mine. Fit perfect. I did have to massage the tunnel a bit on the passenger side. Gen 1 Camaro
Ken Kier makes blanket that is supposed fit real good. I was thinking about that too. Went with the aluminum shield.

TCI says they don't know when they will be able to send one! May have to look at a blanket.

Re: flexplates / shields

so just to understand rule there is no expiry on existing SFI flexplates & if you are using a aftermarket transmission case such as Reid , ATI etc you still need shield or blanket ?

Pete, I hope not, and I don't think you need either if your "Super Case"
comes with 2 SFI #'s. One for the regular shield or blanket area & one for the Flexplate Shield. I just bought an ATI unit to get rid of the aggravation
of having to worry about them, and taking them on & off.

J.R.

I checked the Reid transmission site & their aftermarket powerglide case does Not need a Shield as it has a SFI rating of 4.1 & does Not need a Flexplate shield as has a SFI rating of 30.1 .. just need the answer on expiry dates of existing SFI flexplates

Ah ... just found on nhra general regulations for superstock 3 Years SFI expiry I believe

SFI approved Flexplates to spec 29.1 have a 3 years from date of certification service life. Some manufactures will inspect and Recertify.

SFI approval 4.1 is for transmission shields and cases. They are one and the same for certification purposes. This is for the main case not the torque converter flexplate area. Reid, Dedenbear, ATI, BTE, Trans Specialties and JW are examples of aftermarket cases that are SFI approved and there are others. All of those if undamaged or unmodified usually can be inspected and recertified. Stock cases are not SFI approved and must use an Aftermarket Transmission shield or blanket if Required. SFI 4.1 certified parts have a 5 years from date of certification service life.

SFI approved 30.1 is for Flexplate shields and bellhousings. They are one and the same for certification purposes. This is for the area of the bellhousing that covers the Flexplate area. Reid, Dedenbear, ATI, BTE JW, Trans Specialties are examples of aftermarket bellhousings that are SFI approved and there are others. It can be part of a one piece case or separate bolt on bellhousing. Stock bellhousings are not SFI approved and must use an Aftermarket Flexplate shield if required. TCI and others make these. Most aftermaket bell housings and flexplate shields can be recertified if undamaged and unmodified. SFI 30.1 parts have a 5 years from date of certification service life

One piece cases like Reid and one piece shields like CSR will have both SFI 4.1 and SFI 30.1 both of which need to be recertified at 5 year intervals.

Steve, I Thank You for all the valuable information you provide to the CR site. Much appreciated !!! :)

When you send your trans case in for the 5-year recert, don't forget to include the 'liner' along with the cleaned aluminum case. It's an arched steel plate that does the heavy shielding work.

I made that mistake the first time.

Do you have to have a trans shield and a blanket now in stock. plus the certified flexplate.

Quote:

Originally Posted by Randy Guest (Post 692069)

Do you have to have a trans shield and a blanket now in stock. plus the certified flexplate.

Also curious on this. I think there is a speed/class threshold for it.

Any car running quicker than 10.99 must be
equipped with a transmission shield meeting SFI Spec 4.1.
Beginning January 1, 2024, SFI 29.1 flexplate mandatory on
all V-8 vehicles. Any car running quicker than 9.99, SFI 29.1
automatic transmission flexplate and SFI 30.1 flexplate shield
mandatory. See General Regulations 2:12, 2:14

anyone need an out of date CSR Transmission/Flexplate Super Shield for a Turbo 400?

Quote:

Originally Posted by Lenny5160_v2 (Post 692065)

Not all aftermarket cases have liners in them. 1st design Dedenbear and Reid P/G cases had liners and they must be installed for SFI compliance. ATI P/G cases have liners, not sure on turbo cases. All the current design Reid cases as well as JW cases do not have liners. Others may vary with manufacturer.