Mr Lavish

I got a 1963 impala with a ls2 motor 4l60e trans, the question is would the stock rear end be stronger enought to handle the ls2 swap with out breaking the rearend. i'm running with a 373 gear, 22inch tires,not racing but plan to hit it every so often. I just dont want to spend money twice

Krom

totally depends what the car has for a stock rear, 10 bolt, 12 bolt, or ???

59 camaro

iTrader: (29)

i think it will last u for a lil while but after a few takeoffs i think ull eventually brake it....

itslow

iTrader: (4)

The X-frame cars use neither.

You "should" be fine with the stock axle, but it'd be wise to add some bearing cap girdles. The caps seem to be the first parts to break.

Mr Lavish

Well i know its 10 nuts i had to take off to get to the gears, a lowrider shop told me i may be fine if i go with racing axels since they never broke a rearend with hydraulics. then i was also told if i toy around to much and hard i could snap the rearend, so i'm un-sure what i should do. I want to do something fast since i'm doing my mock up for my frame off

gofastwclass

iTrader: (2)

As an owner of one of those cars I can say the gears are strong enough for daily use but the axles are the weak spot. Using a manual transmission and a heavy foot will make for short lived axles. However behind an automatic without a heavy foot they will be fine - if the axles themselves are good in the first place.

Save yourself the stress and either replace the axles, seals and bearings with new stuff or replace the entire housing with a stronger style housing.

If you are in the lowrider scene, I know a guy who does 9" rears for Impala's ready to install with or without a wishbone. PM me for details.

Monte LS....1

iTrader: (3)

Ditch it...

Mr Lavish

yeah i know a guy at this lowrider shop who can do the ford nine 9inch, but another guy who builds motors told me that there is a 12 bolt rear end that chevy made for the impala, the problem now is me trying to find one, and would that with stand the power & really made a difference

Monte LS....1

iTrader: (3)

I'm on my 2nd stock rear in my 63 2 door hardtop with a small cammed 350 stock 700r4 3.55s and 15 inch wheels. It's a DD that gets an occasionally beating on the street and hasn't been to the track in almost 2 years I'd say now and I'm fixing to replace it again. I'm ditching mine when I do it and would suggest anyone else do the same.

Mr Lavish

I think i'm going spend the extra money, and get a 12 bolt or 9 inch. the only problem with that 9inch is the drive shaft will be off

gofastwclass

iTrader: (2)

The drive shaft will be off with any rear you choose. The only way the drive shaft will be the same is by using the same rear which still may not work because you are changing engines... right? I mean that IS why you're here...

I'm using custom engine mounts, transmission mount and custom drive shaft with a 9" in my car. I don't know if you have looked at a factory Impala drive shaft but I have seen pencils nearly that size - after market shafts use 4" tubes. If you want to get scared do a search on drive shaft frequency and theory then measure your factory drive shaft...

Mr Lavish

after my crash course with driveshafts today i'm i'm going to find me another rearend with disc brakes already on it from a GM and get my mount welded on. I just hae to look into what rear wheel cars came with disc brake and is long enough to work

Krom

Don't forget to look at trucks, GM went to rear disks on the trucks sometime in the 90's

Mr Lavish

thats very ture about the trucks, so far i have the 94-96 impala rear end in mind

Mr Lavish

I been gone for a while but i ordered a custom built 12 bolt 373 posi with wilwood disc brakes yesterday

psiconversion

iTrader: (5)

Do you still have the old 3.73 Center Section. If so, is it a P case? Would you sell it?

Jon
PSI

Stormed_Norm

iTrader: (10)

I have 3 of them. P.M. me for a price, they are not cheap.If your interested.

Mr Lavish

Naw the old rear end was a stock 64 impala ss rear, not a 373 which i had took and apart to get powder coated before i knew i was going get a custom one made