LS6427

iTrader: (2)

Trying to find a 2.73 gear set....can't find it.

Do they make a kit for my Strange 12 bolt rear-end?

Is 3.08 the lowest available..?

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01ssreda4

iTrader: (96)

They were available at some point from GM. Thats all I got.

murphinator

iTrader: (2)

I had a 72 chevelle that came with 12 bolt 273 , swapped it out with a 355 12 bolt this was 0ver 30 years ago lol

LS6427

iTrader: (2)

Damn......thats not good.

3.08 is the highest gear Strange offers.

I'm trying to make 180mph in "D" with a 4L80E. No shifting into "OD" during the run. 7000rpm.
"D" gear in the 4L80E is 1:1

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01ssreda4

iTrader: (96)

Why not go into OD? I mean if the trans can handle it then a steeper rear gear with the OD could equal out to exactly what you need.

LS6427

iTrader: (2)

All of the "reputable" 4L80E builders have said if you let the 4L80E shift into OD under WOT....thats what kills them in a hurry.

Yes, OD with 3.23 rear gears can easily get me to 180mph, but I'll be killing the tranny behind 1,300 RWHP with that OD shift......I'll probably need to rebuild it every couple months.

Does a Ford 9" have 2.73 gears available...?

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FirstYrLS1Z

iTrader: (4)

Summit,for Ford 9",shows down to 3.00. Richmond lists a 2.91.

murphinator

iTrader: (2)

how about 308's and a taller tire ?

LS6427

iTrader: (2)

LOL.....never thought of that. My tire is 25.5". What tire/size could I use thats larger for 180mph runs.......BUT will still allow me to get decent traction?

Speed calculator says I need a 30" tire to make it to 188mph with 3.08 rear gears.

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SteenH

Taller tire = traction
No input otherwise

LS6427

iTrader: (2)

I knew that was the case for drag racing......but I did not know it was true for roll racing 50mph-180mph on the street........

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