1970 GS 455 Convert - GMAD Build Sheet, Box 29 Axle code " OK "

I recently acquired an all original 1970 GS 455 Convertible, and the original large format GMAD sheet was found under the front seat, in excellent condition, all boxes and codes very legible.

This can was delivered to buyer Nov 25, 1969, it was mfg at Leeds plant.

In box 27(eng) code is PC, in box 28 code is BA(tran), in box 29(axle), and in box 108, the Axle code OK

Still can't find any info on what it means ?

I won'y actually get the car until 7-15, at that point I can check the stamps on the axle itself.

Any help is appreciated.

D

 

BA = TH400 non stage 1 trans for A body meaning with the short tailshaft
PC = 70 455 non stage 1 engine set up for a TH400 in a 70 model A body

Standard rear end ratio for that set up was 2.93.

 

It is a 2.93 open. My 1970 had it ink stamped on the bottom of the housing.

 

By "Leeds," do you mean the UK?

 

Kansas City plant

 

Ah....

 

UK??? It is not a Barbie MG.

 

:laugh::laugh:

 

Need to resurrect this thread if I may. I just bought a 70 GS 455 two weeks ago. Pulled the build sheet off the gas tank today. Numbers matching auto car built in Fremont. The only odd ball item on the car is the rear end. The stamp on the axle tube is an SR code if I remember correctly. When I search it shows as on Olds rear. This is an 8.5 open rear in the car. Build sheet shows OK-1 in block 8 and then OK down in block 108 under Axel Number. Can anyone tell me what this car came with originally? Any chance this car got an olds rear originally since they were also built at Fremont? Quick test of comparing drive shaft spin to wheel spin show approx 3 to 1.

Appreciate any assistance.

 

Sorry. Axel stamping is SR B133 2
Block 27 = PD
Block 28 = BA

 

OK - 2.93 open


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Thank you. Curious what you find that? Is that 8.5 in rear?


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No in 1970 it is an 8.2" 10 bolt

 

Standard rear gear ratio, size and type for a US built GS455 auto trans, non stage 1 = Buick only 8.2" ring gear, 2.93 ratio, non posi

 

in 1970 were they built anywhere but USA? The Buick A bodies were not built in Canada after 1969.

 

Interesting to me:

SR = 455 non stage 455
B = Buick Axle assembly
133 = Assembly date, May 13, '70
2 = 2nd shift assembly.

What's interesting is the guy on 2nd shift stamped it with the engine code the assembly was built for.

PD = SR = 455 non stage
BA = TH400 for the 455 non stage.

Congrats on the excellent paper trail :TU:

 

Sorry I miss spoke. Stamping on the rear is SA not SR. "SA B133 2" It is an Olds rear, open, 2.73 according to what I found. This looks to be the only thing that was swapped on this car. Came with an open rear and someone put in another open rear. I dunno.. This car is an OCT 69 build I think

 

Well I stand corrected...

SA = 1969 Olds non-posi 2.78

B = Buick Assembly, May '69, 2nd shift.