Wich ratio should i use

[MalibuChile]

I have Chevy Malibu 82, transmission is a TH200c and had a 7.5" 2.73 ratio, my plan is replace the transmision with a TH200-4R and would like to know wich ratio should i have in the differential to have a better "start". I did not attemp to use the car to run 1/4 mile all the time, just to give them better performance...

Any help will be really appreciated.... Thanks...

 

[tiedyemike8]

3.73 is a good choice for a street car, especially with the overdrive.

 

[468malibu]

I think many of them with the OD transmission had 3.42s, but a 3.73 would be good.

 

[t5montecarlo]

The Monte Carlo SS and 442 had 3.73, the turbo Regals had 3.42. Each came with the TH200-4R

 

[MalibuChile]

So a 3.73 would be good, that ratio allow for a good "start"... because that a problem that i have now, the car has a relatively poor acceleration...

Do you were could i buy those gears, remenber that in my case i have to import them to Chile....

 

[1981Regal]

i would do 3.42

 

[468malibu]

Early S-10s had a 7.5 rear, probly more plentiful than G-body's....

 

[MalibuChile]

What do you think abaout this one...

http://www.summitracing.com/parts/SUM-741011/

 

[SSedan64]

What do you think abaout this one...

http://www.summitracing.com/parts/SUM-741011/

Those are for a 3-Series Carrier which works with 3.23 & higher ratio Gears.

You need Gears for a 2-Series Carrier which work with 3.08 & lower ratios.
Any of these will fit your 2-Series Carrier:
http://www.summitracing.com/search/Brand/Summit-Racing/Product-Line/Summit-Racing-Street-Strip-Ring-and-Pinion-Sets/Axle-Model/GM-7-5-in/Carrier-Series/2/?Ns=Rank%7cAsc&autoview=SKU

I also suggest getting a Master Install Kit that comes with Timken brand Bearings..
http://www.summitracing.com/parts/MGR-R7-5GRLMKT/

You may also want/need Axles Bearings & Seals.

 

[MalibuChile]

Thats why i ask you guys to avoid expending money and purchase something wrong...

Here in Chile until now i couldnt fine a TH200-4R, wich you would recomend in USA...