Re: 71 BW Auto Tranmissions

[farna@xxxxxxx]

The internals are similar, almost the same but not quite. Basically the iron case internals are a bit stronger. Main strenght is the iron case itself. The servos push against the case. If there is to much pressure the aluminum case can crack. 

I had an aluminum trans that had something stuck in the valve body, causing it to go way over pressure and slam in gear. Case cracked while shop was working on it! Threw valve body across an open field (the shop manager!) and rebuilt a junker with my internals and the junker's valve body. No more problems! 

Any Chilton's auto repair manual will have a cut away or exploded parts view of the trans that covers through 71. Or a TSM. 

On January 1, 2005 Joe Wyatt wrote:

> Can anyone provide the following information?  What advantage does the steel
> case 71 BW Shift-Command Auto Transmission have over the Aluminum case
> Shift-Command 71 BW Auto Transmission.  Are the internal parts
> interchangeable?  Any one have cut sheets on the internal lay out of them?
> 
> 
> 
> 
> .


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