Swapping Rear End Question
Thread Starter
Staging Lane
Joined: Mar 2003
Posts: 92
Likes: 0
From: Kansas
Swapping Rear End Question If I got a 10 bolt from a 6-speed car with 3.42's and swapped it for my 2.73 rear end, what all would I have to do after bolting it up? Anything that would make it complicated? I know I would have to get the speedo recalibrated, but I am getting that taken care of with edit anyway. I originally wanted to do 3.73's, but that would cost a LOT more.
Thanks for any help.
Thanks for any help.
Teching In
Joined: Jan 2004
Posts: 2
Likes: 0
From: DFW
hey berman, you shouldnt have to do much more than cal. the speedo, as long as the rear end you are swapping is from a compatible year car. there isnt any difference in the rear axle housing whether its from an automatic car or a 6 speed. now, if youre taking the 3.42 10 bolt out of a way earlier model vehicle, you will have to do some pretty extensive welding/ fabrication. ive taken a 12 bolt leaf spring set up, "like for a 68 or so camaro" and put it in a gen 4 car twice. you have to cut all the spring perches and brackets off of the new 10 bolt, and weld them on in the correct locations on the older 12 bolt. (the same would go for an older 10 bolt). the geometry and layout is no where near the same in an older car compared to your 98z. it is not easy in any manner and requires PRECISE grinding/welding/location of the 10 bolt hardware to the 12 bolt. proffesional assistance is recommended if this is your case, or you will end up with a big freakin nightmare.
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Thread Starter
Staging Lane
Joined: Mar 2003
Posts: 92
Likes: 0
From: Kansas
Originally Posted by My84Z
yes you can just swap and use your backing plates and what not or you can just tuck your wires away and not have tcs anymore.
Its a good idea. I am putting a 12-bolt 4.10 in my M6 and taking the stock 3.42rear and puttung in friends 2.73 A4 02 z28. He wants to upgrade gears for low cost and i want to get rid of the rear, works out great for both parties!!! 
Thread Starter
Staging Lane
Joined: Mar 2003
Posts: 92
Likes: 0
From: Kansas
Originally Posted by 01SLPSS
I am putting a 12-bolt 4.10 in my M6 and taking the stock 3.42rear and puttung in friends 2.73 A4 02 z28. He wants to upgrade gears for low cost and i want to get rid of the rear, works out great for both parties!!!
You cannot 'turn off' the TCS iwith edit, you will get two annoying yellow and two red lights on your dash if the wheel sensors are disconnected since the ABS will no longer work also.
I dont have my TCS or ABS anymore, just have to take the cluster apart and block off the LEDs, you just cant pull the bulbs, they are LEDs soldered to a PC board.
I dont have my TCS or ABS anymore, just have to take the cluster apart and block off the LEDs, you just cant pull the bulbs, they are LEDs soldered to a PC board.
I didn't mean nothing by the rolling eyes, just didn't get the right smiley.
Hey, Good Luck!!! My friends car needs the 3.42's bad, he complains about beening slower then us other guys all the time!!!
Hey, Good Luck!!! My friends car needs the 3.42's bad, he complains about beening slower then us other guys all the time!!!
Thread Starter
Staging Lane
Joined: Mar 2003
Posts: 92
Likes: 0
From: Kansas
Originally Posted by 01SLPSS
I didn't mean nothing by the rolling eyes, just didn't get the right smiley.
Hey, Good Luck!!! My friends car needs the 3.42's bad, he complains about beening slower then us other guys all the time!!!
Hey, Good Luck!!! My friends car needs the 3.42's bad, he complains about beening slower then us other guys all the time!!!
Its cool. Yeah, 2.73's are dumb. I dont know why GM ever put those in F-bodys. 
