I have been told that the newer 700r4 transmissions are stronger and much more desirable than the older units. Could an old tranny be updated?

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91 Camaro TPI, 355ci. Sportsman 11 heads, LT-4 Hot cam,Pete Jackson gear drive, on,and on, and on... 13.6 @ 102.5 with a 2:73 open rear, no traction, no tuning, no practice.

1985 California Edition IROC red, polished TPI and polished wheels, otherwise completely stock 305ci. & automatic trans.

 

I know that pre-84 1/2 had a smaller 27 spline input shaft and 84 1/2 and up have a larger 30 spline input shaft. In 1987 they did some other modifications to make them stronger but I can't find my referances right now.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

They upgraded to a 10 vane pump instead of a 7 vane, and some stronger bands or clutches, and some other stuff. Jason, ask my dad, he will know for sure. And you can definitely upgrade an 84 and up 30 spline trans to the newer specs.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I have one from an 83 Z28. The trans. is fine with no known problems, I just wondered if it was worth anything or if I should look for a newer unit to use. I am only wanting a daily driven drivetrain from it, not a hot rod, so I may be ok... I have my 91 to drive hard 8^)

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1991 Camaro TPI, 355ci. Sportsman 11 heads, LT-4 Hot cam,Pete Jackson gear drive, on,and on, and on... 13.6 @ 102.5 with a 2:73 open rear, no traction, no tuning, no practice.

1985 California Edition IROC red, polished TPI and polished wheels, otherwise completely stock 305ci. & automatic trans.

1991 fullsize Blazer 4-wheel drive, 350,700r4, Pro Comp lift, K&N, TBI spacer, 3" Catco cat, 3" cat back Flowmaster, etc....

 

The '82s were really crappy being the first year for them, and many were recalled. You didn't even try to fix them, just replace them. Over the years, they were constantly improved. '87 being the biggest year. One of the biggest changes in '87 was the addition of the auxillary valvebody. This requires a different case to accomodate this, therefore is not interchangable. Most of the internals are interchanable, but would probably be in your best interest to find as late model as you can (prior to '93, after '87)

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Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey, 22# injectors,
JET AFPR, Ported Plenum,
TB Coolant Bypass,
SSM SFC, Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE