SS/GT classes transmission?

[FireSale]

I'm not sure about this. In GT weight is linked to the transmission you want to run but I'm not sure a factory match is required in the finished car.



The rules state weight is determined using the heaviest weight gas engine with appropriate transmission available. So to find the shipping weight of a car for stick or auto application, find that car's heaviest weight in either stick or auto for the weight factor.
There is no transmission section in the GT section, just shield requirements. That means you look back to SS which reads any model trans same make as body with forward gear limits. Nowhere does it state stick must be stick or auto must be auto for any flavor of SS. Adapter plates are allowed. You can bolt up a trans that's not designed for your bellhousing.


If you are allowed to drop a motor from a '60s station wagon into the "trunk" of a Cobalt, why can't you bolt an auto to a stick only engine like a '70 BOSS 302 Mustang? In one, you rebuild the entire car. In the second you change the trans/bellhousing.

[Dave Noll]

Originally Posted by Jim Caughlin

, but no 5 speed in an original 4 speed combo.

Uhm, is that the regular SS classes as well?

[Ernie Neal]

Originally Posted by Dave Noll

Uhm, is that the regular SS classes as well?

Yes

Ernie Neal
SS 354

[1347]

Originally Posted by FireSale

I'm not sure about this. In GT weight is linked to the transmission you want to run but I'm not sure a factory match is required in the finished car.



The rules state weight is determined using the heaviest weight gas engine with appropriate transmission available. So to find the shipping weight of a car for stick or auto application, find that car's heaviest weight in either stick or auto for the weight factor.
There is no transmission section in the GT section, just shield requirements. That means you look back to SS which reads any model trans same make as body with forward gear limits. Nowhere does it state stick must be stick or auto must be auto for any flavor of SS. Adapter plates are allowed. You can bolt up a trans that's not designed for your bellhousing.


If you are allowed to drop a motor from a '60s station wagon into the "trunk" of a Cobalt, why can't you bolt an auto to a stick only engine like a '70 BOSS 302 Mustang? In one, you rebuild the entire car. In the second you change the trans/bellhousing.

Except when you try to put that Boss 302 in a different body to run GT, it only gives you stick class
Stick only engine combos are only allowed to run in a stick class. Same goes for the 85 mustang carb 302.

Duane

[FireSale]

Originally Posted by 1347

Except when you try to put that Boss 302 in a different body to run GT, it only gives you stick class
Stick only engine combos are only allowed to run in a stick class. Same goes for the 85 mustang carb 302.

Duane

I have heard this numerous times on Class Racer but I can't find anything in the rules to support it. I simply can't find any rule restricting stick only showroom motors from being used with auto trans cars in GT.

[KRatcliff]

Originally Posted by FireSale

I have heard this numerous times on Class Racer but I can't find anything in the rules to support it. I simply can't find any rule restricting stick only showroom motors from being used with auto trans cars in GT.

The reference at the beginning of the Super Stock section:

"Reserved for foreign and domestic factory-produced automobiles and sports cars. Classified per NHRA performance rating as listed in the Official NHRA Stock Car Classification Guide. Only those cars listed in the guide are eligible."

The reference at the beginning of the Super Stock GT section:

"Reserved for foreign and domestic factory-production two-door coupes, two-door sedans, sports cars, convertibles, or station wagons with any production V-8 engine of the same make. Year of engine optional. Only those engines and/or bodies listed in the Official NHRA Stock Car Classification Guide are eligible
for competition."

You can view the class guide on NHRAracer.com for the 1970 Ford as an example. The GT section references both manual and automatic transmissions. Look under the 302 column and you will see only HP factors for the manual referenced and none for the automatic for OEM heads or replacement heads.

Which means the manual transmission is the only one in the guide and eligible for competition. There is no factor if you wanted to run an automatic so it wouldn't be eligible.

[Sean Marconette]

There a few of us that run those combinations that state STICK only in the guide, so they do exist.



Sean

[mannymen]

Sean, so u r running an automatic in a stick only GT combo?


Thank You

[Sean Marconette]

Originally Posted by mannymen

Sean, so u r running an automatic in a stick only GT combo?


Thank You

In my signature it states I run in SS/N, it is a traditional stick car. I was clarifying that there are a few combos in the guide that are stick only. Hope that makes sense?

Sean

[FireSale]

[QUOTE=KRatcliff;616929]The reference at the beginning of the Super Stock section:

"Reserved for foreign and domestic factory-produced automobiles and sports cars. Classified per NHRA performance rating as listed in the Official NHRA Stock Car Classification Guide. Only those cars listed in the guide are eligible."

The reference at the beginning of the Super Stock GT section:

"Reserved for foreign and domestic factory-production two-door coupes, two-door sedans, sports cars, convertibles, or station wagons with any production V-8 engine of the same make. Year of engine optional. Only those engines and/or bodies listed in the Official NHRA Stock Car Classification Guide are eligible
for competition."

You can view the class guide on NHRAracer.com for the 1970 Ford as an example. The GT section references both manual and automatic transmissions. Look under the 302 column and you will see only HP factors for the manual referenced and none for the automatic for OEM heads or replacement heads.

This is a good reply and I thank you for your time, but those opening paragraphs refer to engines and bodies, not transmissions. The 69 BOSS 392 is not listed as a stick or auto motor, just 392/290. I looked up the 69 Mustang Fastback and it isnt listed as a stick or auto car. Just 302/290 with a BOSS footnote. Note that I am referring to the Official NHRA Rules and Guides only.
Im not trying to be difficult, just looking for a bulletproof answer to the trans question in GT.