Planning on swapping in a 4th gen rear end into my '91. I am thinking this should be easy but was wondering if anyone has done this or has experience. Wondering if anything has to be changed with the brakes or anything else. Thanks

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91 Z28 BLACK WITH RED INT. 350 WITH AUTO
BEST TIME 14.76
K+N WITH MODIFIED AIR BOX
PORTED PLENUM
91 Z28 RED WITH BLACK INT. 305 WITH 5 SPEED
BEST TIME 15.00
ALWAYS AROUND FOR CAR AUDIO QUESTIONS
MOBILE ILLUSIONS/
CERTIFIED MECP PRO

CUSTOM 10" SUB BOXES
http://sites.netscape.net/ratherick/homepage

 

All the mounting hardware is a direct bolt-in. The 4th gen diff is 2 inches wider per side so correct backspace rims are required.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready 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

 

Thanks Stephen. The back spacing is the reason I'm doing this. I'm putting 4th gen SS
rims on it and didnt want to put spacers on with the stock rearend.

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91 Z28 BLACK WITH RED INT. 350 WITH AUTO
BEST TIME 14.76
K+N WITH MODIFIED AIR BOX
PORTED PLENUM
91 Z28 RED WITH BLACK INT. 305 WITH 5 SPEED
BEST TIME 15.00
ALWAYS AROUND FOR CAR AUDIO QUESTIONS
MOBILE ILLUSIONS/
CERTIFIED MECP PRO

CUSTOM 10" SUB BOXES
http://sites.netscape.net/ratherick/homepage

 

the only PITA is getting the e-brake cables hooked up,they're slghtly differnt.Takes alittle enginuity to make them work,i have mine rigged but they work.everything else is direct replacement..

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92RS,POLO GREEN

 

Hey Rick,
Make sure you post the results. I'm doing the same thing and using the same rims so I'd like to hear how you with your swap. By the way the tech page on this site has an article about doing this swap and according to this the 4th gen cables and brackets will work with your third gen parts. To bad the junkyard I bought mine out of cut the cables before I could tell them not to.

 

the cables will work,but not without some home engineering skills....lol

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92RS,POLO GREEN