42RH build recommendations

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modart440

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5.9 Magnum usual aftermarket parts Eddy heads mild roller cam air gap intake 750 Demon carb fresh 9:1 shortblock.My question is in regards to the 42 RH trans build for the car. Car will have approximately 350-375 hp. Is it really necessary to go crazy on the trans built or just a good solid stock type complete rebuild to stock specs or possibly red alto clutches and steels with a fresh 2500 stall LU converter and Transgo stg2 shift kit. Car is a Pro Touring type build big suspension and brakes. 95 % street driven 3:55 gears.Looking for opinions from people in the trans buisness or others that have done this trans swap.
Thanks in advance
 
modart440 said:
5.9 Magnum usual aftermarket parts Eddy heads mild roller cam air gap intake 750 Demon carb fresh 9:1 shortblock.My question is in regards to the 42 RH trans build for the car. Car will have approximately 350-375 hp. Is it really necessary to go crazy on the trans built or just a good solid stock type complete rebuild to stock specs or possibly red alto clutches and steels with a fresh 2500 stall LU converter and Transgo stg2 shift kit. Car is a Pro Touring type build big suspension and brakes. 95 % street driven 3:55 gears.Looking for opinions from people in the trans buisness or others that have done this trans swap.
Thanks in advance
Click to expand...
do all the updates. I know on a 46re that could cost up to about 700 or 800, just parts
 
I put a 42RH behind my 5.9 magnum. Didn't do a total rebuild, but did put in the Alto red clutches and kolene steels, new front band,and I did the Transgo shift kit, some new gaskets and seals.
Running great, shifts nice, I have just the basic magnum build as well, airgap, Edelbrock 1406, stock cam so maybe a little less HP than yours.
The overdrive trans was one of the best things I've done to my car. So nice being able to cruise the highway at a nice low rpm.
 
You guys want the updated manual valve that allows flow where the stock doesn't.
Drain back, crummy servo that jams up, 1st planetary needs steel 3 gear or better, not the aluminum 4 or 5.

There are many corners cut on those transmissions. That's why they kill themselves.
 
MOPAROFFICIAL said:
You guys want the updated manual valve that allows flow where the stock doesn't.
Drain back, crummy servo that jams up, 1st planetary needs steel 3 gear or better, not the aluminum 4 or 5.

There are many corners cut on those transmissions. That's why they kill themselves.
Click to expand...
Anyone else?
 
modart440 said:
Anyone else?
Click to expand...
Agree, id like to hear all that other have had done to theirs. Mine in truck was nearward of 2,700. 1000 in parts, convertor included.
I bought a derale deep pan as well and a cooler separate from the rad. Too expensive to not do right!
 
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