PerformaBuilt Transmissions

[Loves302Chevy]

http://performabuilt.com/gm performance car and truck.html

There was an article about these guys in this month's CarCraft or Chevy High Performance.

Gibbles and Brian should find this interesting.

Their Level 3 Black Edition 4L60E has a Sonnax six-pinion planet on the input carrier which
changes the gearing from 3.06 and 1.63 to a 2.84 First and 1.55 Second gear.



Read the whole article here: http://www.superchevy.com/how-to/tr...g-the-ultimate-4l60e-with-better-gear-ratios/

 

[87vette81big]

Its been out since 2011.
Entire Corvette Forum Blew it off.
It was $650 then..
Out of budget then.

Digital Corvetre Building your own ended in 2012.
Crate everything since

 

[87vette81big]

In theory you shoul run .8 -1.0 seond faster ET IN 1/4.

 

[87vette81big]

Since Hellcats came out the Scapegoat is Lets do Protouring Vettes.
Roadrace.

 

[Loves302Chevy]

In theory you shoul run .8 -1.0 seond faster ET IN 1/4.

That is actually a pretty good drop. If you drop .1 second from every 100 pounds of weight reduction, then this would
be equivalent to 800 - 1000 pounds. I know, apples and oranges, but...... still not bad.

 

[87vette81big]

Driving home from work so its hard to type.
The 700 R4 was geareed for non drag race use.
Move a Heavy Chevy Caprice with just 180 HP

 

[Loves302Chevy]

It would be nice to lessen the huge rpm drop from 1st to 2nd.
My car is heavy, and I still have a 305 based engine (334).
So I will probably leave it alone.

 

[87vette81big]

The 3.06 1st gear in the 700R4 of my 87 Corvette works nice with the 2.73 gears .

Also my Suburban has the 4L60E With same 3.06 1st gears.
Helps move 6,000 lbs easy.
When towing It still. moves effortless.

Its been a long time but the guys did a computer analysis and 3.06 1st works OK till 550 HP .

 

[87vette81big]

They never will be able to build an Overdrive 4-speed as durable for same low cost as a 700 R4.

Others out there but extreme cash required .

 

[87vette81big]

There actually is....
Ford Products .
AOD & E40D.

 

[Loves302Chevy]

Same with my truck and it has 3.73s. But the TransAm has 4.10s.
Which gives me (3.06 x 4.10) = 12.546.

 

[87vette81big]

The Trans Am will launch nice

 

[87vette81big]

The Isky Mega Cam will keep pulling.
No worries Mike.