Rear end options for my V6 Caprice

Drivetrain discussion including Transmission, Differential, Driveshaft, and related items.
Dbtheemcee
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Rear end options for my V6 Caprice

Post by Dbtheemcee »

Will a rear end from a 6.0 2014 Caprice swap into a 2012 3.6 Caprice? My diff is going out and I found a full rear end (minus brakes) from a v8. Will this work? If so is there anything that I need to know?
s/c'd cav
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Re: Rear end options for my V6 Caprice

Post by s/c'd cav »

yes
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Mooseman
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Re: Rear end options for my V6 Caprice

Post by Mooseman »

It will physically fit but what's the gearing with the V6? If it's the same, then no problem. If it has a higher ratio (i.e. 3.27) and you're swapping in a 2.92, with the V6, it will become a dog. Great for mileage, terrible for takeoff.
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Sanford
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Re: Rear end options for my V6 Caprice

Post by Sanford »

The V-6 diff on 2013 has a different flange size than the same year V-8 car. I just did a V-6 swap into a V-8 chassis and that was the only part that I overlooked as being different. Don’t know if the flange can be swapped out or not. Would be best to find a friendly parts person at a GM dealer and let them look at some of the repair parts to see what is interchangeable.
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elc32955
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Re: Rear end options for my V6 Caprice

Post by elc32955 »

LFX V6 cars all have the 2.92 ratio stock from the factory. And... a lot of these cars were NOT provided with the G80 option (my car included). Open rear... bleh. As long as you're not going to autoX the car or expect it to win road races it's an OK setup though.

We've covered the 2.92 debacle here before, it was a late-stage alteration to get the EPA fuel economy figures up a bit in order to make the car more palatable to fleet buyers. And it does bump the top end slightly, just takes longer to get there - these cars were all originally designed for 3.27's. I'd love to see what a LFX car would do with 3.45's or 3.73's so we have some comparison.

Eric
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s/c'd cav
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Re: Rear end options for my V6 Caprice

Post by s/c'd cav »

all caprices are 2.92's

guess the guibo's(rubber u-joints) are different between them
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sardillim
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Re: Rear end options for my V6 Caprice

Post by sardillim »

elc32955 wrote: Thu May 27, 2021 7:12 pm LFX V6 cars all have the 2.92 ratio stock from the factory. And... a lot of these cars were NOT provided with the G80 option (my car included). Open rear... bleh. As long as you're not going to autoX the car or expect it to win road races it's an OK setup though.

We've covered the 2.92 debacle here before, it was a late-stage alteration to get the EPA fuel economy figures up a bit in order to make the car more palatable to fleet buyers. And it does bump the top end slightly, just takes longer to get there - these cars were all originally designed for 3.27's. I'd love to see what a LFX car would do with 3.45's or 3.73's so we have some comparison.

Eric
my 2012 v6 has the g80
Dbtheemcee
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Re: Rear end options for my V6 Caprice

Post by Dbtheemcee »

s/c'd cav wrote: Thu May 27, 2021 7:36 pm all caprices are 2.92's

guess the guibo's(rubber u-joints) are different between them
My V6 is 4.10
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elc32955
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Re: Rear end options for my V6 Caprice

Post by elc32955 »

Not bad, do you DD the car? How's the fuel economy with that gearing?

Have you done any track passes with it, any 1/4 mi times?

Thanks
Eric
System Manager and your tour guide for the day. 2015 Caprice w/LFX, former NC DPS staff car. Partial hybrid G8/SS/Camaro SS interior mods, SS MyLink radio upgrade, 2016 Camaro V6 rims, GMPP Malibu chrome exhaust tips, otherwise bone stock for now.
s/c'd cav
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Re: Rear end options for my V6 Caprice

Post by s/c'd cav »

Dbtheemcee wrote: Fri May 28, 2021 1:43 am
s/c'd cav wrote: Thu May 27, 2021 7:36 pm all caprices are 2.92's

guess the guibo's(rubber u-joints) are different between them
My V6 is 4.10
you best crawl under your car and read the diff tag , its 2.92

GM did not offer any different ratios in the caprice , and there was no swapable diff sold in the US with 4.10s

you could be thinking of your FIRST gear ratio
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