type3 auto trans

[[email protected]]

I have a 69' fastback with an auto tranny. I just spent big money on a new engine and would like to beef up the trans if possible. My trans works fine at the moment but I'm worried the extra power may take it's toll. Any helpfull comments would be appreciated.

[westy demi-god]

It's been my experience that anything other than a stock engine or mildly modified engine (light cam upgrade, 1641cc, etc.) can cause problems with the AT working right. I've always steered clear of AT type 3's. Good luck, though. Sorry I can't be of more help to you.

[[email protected]]

Our trannies are used in the 1980's buses coupled to those "porsche engines"
and wasserboxer engines. The major components were still used in the 90's
cars.

Do not worry how strong this
tranny is , there is a type 3 dragster with 500 hp with an autotranny.
Most of those V8 dragsters with thousands of horspower use Autotrannies
because it is not humanly possible to shift from 0 to 300 miles an hour
in 4 seconds,too much going on, they use the old GM powerglide.

To make our trannies last forever replace fluid after heavy use like a race or
towing heavy stuff. During normal driving , replace fluid at every other or third
engine oil change. Make sure you have the updated torque converter
with the bunch of wavy fins. Use semisynthetic tranny fluid, Quakerstate or
Valvoline. If you want , install a tranny temp fluid gauge to monitor temps
when needed.

These tranny's are tough , the big problem stems when
people think the fluid will last forever without changing. With the years
the fluid will breakdown like oil because of heat. The other problem comes from
the older torque converters with virtually no cooling fins. You should not have any
problems, my tranny has gone through 5 owners and 4 engines without a rebuild.
Just change your fluid regularly, I think these should be able to take any power
these engines put out but fluid should be changed depending on use. Bottom
line , do not drive around with fluid that has changed color.

Do not forget to replace the GL-5 in the differential every other year or you
will be unhappy . I just had to fix my
differential assembly because the previous owners failed to put any of the GL-5 oil.

I have done every kind of damage to an autotranny, so I
know, just neglegence.