Re: [DMCForum] Engine Conversion..

[Bob Brandys <BobB@xxxxxxxxxxxxxx>]

Mark,

I know you are not considering an automatic in your car, but just 
incase, I thought I would give you an update.

As you know my car has a 4HP22E,  which is an electronically controlled 
transmission.  Well, it seems that ZF screwed up up on the line 
pressure for P N R and the transmissions prematurely fail. You can 
search this on google.

This  electronic transmission was dropped and the hydraulically 
controlled unit was used for almost 8 more years.  4HP22HL.   These 
transmissions are fairly plentiful and the rebuilding parts are 
available on line!

This hydraulic transmission with the Kennedy adaptor is fairly easy to 
install.  and requires no computer.

In fact, I now have one of these transmission and am seriously 
considering putting it into the Time Machine.   Then I could really 
beat on it and have fun.

My electronic trans works okay, but unless I am able to reduce the line 
pressure in PNR it will fail after 50,000 miles.

Since I only drive about 1,000 miles per year, this should last a long 
time. BUt I can't hot rod the car, other than flat out acceleration 
(which is great) without the shifts being too hard.


The computer program only controls line pressure on up shifts.   I 
guess the engineers never thought about down shifts and what happens in 
P, N and R.    If I was able to hack into the controller chip and write 
my own software to fix this if would be great, but I am no electronic 
PLC hacker wiz.  and don't know anyone who is.

BOB

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