Oct 60 Service Letter on T10 4sp change to alum

[Tom P.]

Does anyone happen to have a copy of an Oct 60 Service Letter which states that the T10 cast iron main case will be changing to an alum main case for the 61 model year?
If so, can you post it?

[John F.]

Re: Oct 60 Service Letter on T10 4sp change to alum

Tom, not what you are looking for, but the Corvette Black Book mentions aluminum cases for four speeds were introduced in 1961.

[Tom P.]

Re: Oct 60 Service Letter on T10 4sp change to alum

Tom, not what you are looking for, but the Corvette Black Book mentions aluminum cases for four speeds were introduced in 1961.

Correct. And as I understand, GM issued a Service Letter in, or about, Oct 60 informing dealers that the iron case T10 would be replaced by an alum case about Nov 60.

[William C.]

Re: Oct 60 Service Letter on T10 4sp change to alum

Chevrolet Service News, October 1960has the notice, Page 28.

[Tom P.]

Re: Oct 60 Service Letter on T10 4sp change to alum

Thanks Bill.