4.56 in 05 auto?

[RedlinedSSR]

is this common swap out i see some people put smaller..whats the best swap?

[gmac]

I have a set of 4:56 I am putting in my "05 Auto Just waiting for the go ahead from Wester's to head out for install & tune. Remember your auto is a TORSEN REAR END and requires special gears to fit and work....
Good luck!

G

[xs-cash]

best bang for the buck!!!!

[Cash]

Everyone that has swapped gears seems to be very pleased, whether 4.10 or 4.56. I put 4.56's in my 6sp and a vast improvement over the 3.73's but until one drives and compares with the 4.10's how would they know what is the "best" swap? Depends on the driver preferences and habits also. With the 3.73's I just about didn't use 6th gear and now I find myself in 4th or possibly even 5th cruising around when I would have been in 3rd before. 4.10's might be the happy medium for city and highway casual driving but I am very content with the 4.56's.

[frose]

Has anyone checked the gas mileage after the swaps, has there been much change ?

[xs-cash]

no real differance in mileage,a lot more fun to drive!!

[RUN ROD RUN]

Originally Posted by frose

Has anyone checked the gas mileage after the swaps, has there been much change ?

Maybe a quarter to half a mile per gallon a different ... I don't know and don't care and like xs cash said, "a lot more fun to drive!!"

[RedlinedSSR]

gmac so the same gears that would fit the 6 speeds wont fit the autos?....can someone give me some part numbers maybe or specs?

[gmac]

Type
.....Hydra-Matic 4L65-E (M32)...........4-speed automatic w/overdrive, rear-wheel drive
.....Tremec T-56 (M10)....................6-speed manual
Gear ratios
.....Automatic w/OD
..........First...................................3.06
..........Second...............................1.62
..........Third..................................1.00
..........Fourth................................0.70
..........Reverse..............................2.29
..........Final drive...........................3.73:1
.....Manual
..........First...................................3.01
..........Second...............................2.07
..........Third..................................1.43
..........Fourth................................1.00
..........Fifth...................................0.84
..........Sixth..................................0.57
..........Reverse..............................3.28
..........Final drive...........................3.73:1
Gear size
.....auto........................................8.5 (Torsen)
.....manual.....................................9.5 (Eaton)
Gear cover
.....auto........................................10 bolt
.....manual.....................................14 bolt

[turnheadz]

Originally Posted by gmac

I have a set of 4:56 I am putting in my "05 Auto Just waiting for the go ahead from Wester's to head out for install & tune.
Good luck!

G

soon? let me know when you git 'r dun.

[big-daddy]

I went to the 4.10's for a year then jumped to the 4.56's, big difference for me. It is a matter of personal taste though, not everyone wants the tail down , nose up feel when you nail it, you'll get that with the 4.56.

[gmac]

Originally Posted by turnheadz

soon? let me know when you git 'r dun.

Was scheduled for this week, but he (Lyndon) is behind getting a new hoist installed that he needs for 'vette work. Hoping I get a go for next week... weather permitting!

[bgetz]

I agree this is a personal decision as well....
My opinion is
03 -04 i would go with th 456 gears
05 -06 i would want the 410's

I say that only because you have the xtra HP with the 05 & 06

You should seriously consider whether your over gearing by putting 456 in the newer SSR.

Just my .02 worth.

[turnheadz]

Originally Posted by gmac

Was scheduled for this week, but he (Lyndon) is behind getting a new hoist installed that he needs for 'vette work. Hoping I get a go for next week... weather permitting!

last time I was there he had a lot of Vettes on site. I'm going in June for the work so am interested in your feedback after you run it a few weeks. PM me