C4 to 4r70w anybody tried it?

indyrt

indyrt

Club Member
My car has the PA full tilt trans and a 5,000 stall. Thinking of trying a 4r70w to gain a bit of cruise rang with a haha...street car 4:56 gears... IF so, How bad did it slow the car..?
 
Not sure if your C4 is standard gear set or different, but the 4R70 has quite a bit shoter 1st gear. Just something to consider with the 4:56 rear end.

--Joe
 
I think you will like it. I still run a C-4 in my car, but plan to put a gear-vendors overdrive behind it. Lentech makes the best 4R70W's, but man are they expensive. Easily $5500--6500 just for thr trans. Plus with the gear-vendors OD, i will have 6 speeds! Jeez, 4.56's? Are you running eighth mile or something? I had 4.30s and had to get rid of them, got tired of seeing the tach at 3K all the time....


Rudy
 
Yea i get tired of not being able to go on the freeway with my C4 with 4:11s.

Can AODs hold a decent amount of power?

And with 4:11s is it normal for my car to top out at like 70-90 mph?
 
gub said:
Yea i get tired of not being able to go on the freeway with my C4 with 4:11s.

Can AODs hold a decent amount of power?

And with 4:11s is it normal for my car to top out at like 70-90 mph?
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a properly built 4r70w will hold over 1000 HP, contact Sean@CARS or Mike Ridings for info, they cooperated on R&D, they seem to be holding up pretty well
 
Termin8orFox said:
I think you will like it. I still run a C-4 in my car, but plan to put a gear-vendors overdrive behind it. Lentech makes the best 4R70W's, but man are they expensive. Easily $5500--6500 just for thr trans. Plus with the gear-vendors OD, i will have 6 speeds! Jeez, 4.56's? Are you running eighth mile or something? I had 4.30s and had to get rid of them, got tired of seeing the tach at 3K all the time....


Rudy
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Call Mike Ridings... His transmissions are badass... You would be 100% happy with him...
 
4r70w/aod are great!!!

indyrt said:
My car has the PA full tilt trans and a 5,000 stall. Thinking of trying a 4r70w to gain a bit of cruise rang with a haha...street car 4:56 gears... IF so, How bad did it slow the car..?
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The 4r70w is a great trans. I'd put the aod-e gears in it though, that way you can have your c-4 ratio's in 1st thru 3rd and then have the o/d ratio.

Ask Dpmagee how far an aod will go (i just built the converter)
 
4r70w

DUDES. uhhhh lidio has put these behind COUNTLESS motors... The green coupe he did with a cobra motor and an s trim went 9.60's and street drove the car all day long......UNTOUCHED!

As for my 4:56 & spool, I'm spinning 7500 in my 351... (for those who don't know), a motor is an air pump and NA motors love to spin to make power... It sounds nice too!!! I just don't want the added r's on the freeway. My motor is a pump gas motor. I'm trying to make it a driveable race car I guess...I call it a race car in disguise (as a street car)....????
 
Ridings Automatics said:
The 4r70w is a great trans. I'd put the aod-e gears in it though, that way you can have your c-4 ratio's in 1st thru 3rd and then have the o/d ratio.

Ask Dpmagee how far an aod will go (i just built the converter)
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Your probably very correct on the gearing...With a 4:56 first would be too violent and to fast.... Hummm.....hummmmmm
 
power loss going 4r70w

indyrt said:
Your probably very correct on the gearing...With a 4:56 first would be too violent and to fast.... Hummm.....hummmmmm
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STILL looking for someone who has tried with a 10/ 11 sec car to see how much was lost.....
 
Well we have put 1200/1300hp into our units. they have been delivering consitent reliable performance in cars running in the mid 8's. shift kitted 4r70w with the late stub shaft is good for a reliable 10 second car. After that a few minor tweaks are needed to keep the trans reliable.

indyrt said:
DUDES. uhhhh lidio has put these behind COUNTLESS motors... The green coupe he did with a cobra motor and an s trim went 9.60's and street drove the car all day long......UNTOUCHED!

As for my 4:56 & spool, I'm spinning 7500 in my 351... (for those who don't know), a motor is an air pump and NA motors love to spin to make power... It sounds nice too!!! I just don't want the added r's on the freeway. My motor is a pump gas motor. I'm trying to make it a driveable race car I guess...I call it a race car in disguise (as a street car)....????
Click to expand...
 
a swap from a c4 to a AODE or 4ro70 or 4r70w is not going to negatively affect ET in the least. in fact with the deeper ratios of the 4r70w planetary it may actually improve your 330 ft times.

indyrt said:
STILL looking for someone who has tried with a 10/ 11 sec car to see how much was lost.....
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Sean said:
a swap from a c4 to a AODE or 4ro70 or 4r70w is not going to negatively affect ET in the least. in fact with the deeper ratios of the 4r70w planetary it may actually improve your 330 ft times.
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Id lay money down to say your wrong.. I'd have to believe the internals weigh more and a stock 4r70 has more drag than my full tilt PA C4 unit... Maybe I'll be the test bed!!!
 
indyrt said:
Id lay money down to say your wrong.. I'd have to believe the internals weigh more and a stock 4r70 has more drag than my full tilt PA C4 unit... Maybe I'll be the test bed!!!
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How much do you want to bet? :icon_bigg
 
Raw weight vs power flow. The 4r70 has a power flow advantage that make it more efficient then most overdrives. I doubt its much of a power hog only becuase we have used them alot.

at the end of the day the difference isn;t going to be anything really measureable.

indyrt said:
Id lay money down to say your wrong.. I'd have to believe the internals weigh more and a stock 4r70 has more drag than my full tilt PA C4 unit... Maybe I'll be the test bed!!!
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I don't know.

indyrt said:
Id lay money down to say your wrong.. I'd have to believe the internals weigh more and a stock 4r70 has more drag than my full tilt PA C4 unit... Maybe I'll be the test bed!!!
Click to expand...

I've swapped th400's in place of the c-4 and lost nothing and the 400 has a 41 pound rotating weight (gear set).

For a N/A car i'd run the 4r70w gears for a serious nitrous,supercharger,or turbo car the aod-e set is the way to go. If it's super serious then my 2.20 set will work.
 
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