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RE: [T3] FI Automatic Fastback Stalls in Drive at Stoplights


On Fri, 2006-09-29 at 20:18 -0400, Keith Park wrote:
> First off, Id start by putting back together the correct matching set of FI
> components, the time spent making the mismatched parts work together will
> exceed the time spent finding the right ones, and they will probably never
> work properly together and could shorten engine life by having the mixture
> wrong.  Engine life is critical to mixture in our engines.  You want a
> matched set that match the car, not necessarily the case... the 72 engines
> were the same internally as far as what mixture is needed except for the
> fact that they had dished pistons originally.
> 
> Correct me if Im wrong but wouldn't a T4 tranny be a very incorrect match
> for the T3 engine since the T4 engine has so much more Torque and some had
> more HP?  I would think the shift points would be all wrong and probably the
> axle ratio too....  
> I know the Manuals are not swappable with ease, this isn't the case with the
> autos?
> 
> Keith

T-4 automatic's had a lower differential ratio. This will throw off the
shift points. The govenor is driven by the differential.  Also, if the
timing isnt right, the manifold vacuum won't be right.
-- 
russw <russw@classicvw.org>

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