Re: mUNCIE REBUILDING
Dick,
are you sure it's a 3.70? 3000rpm at 70mph sounds like a 3.36.
George
Dick,
are you sure it's a 3.70? 3000rpm at 70mph sounds like a 3.36.
George
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Re: mUNCIE REBUILDING
[QUOTE=George Jerome (31887);655343]Dick,
are you sure it's a 3.70? 3000rpm at 70mph sounds like a 3.36.
Yes it is a 3.70:1 ratio. I took out a 3.36 OEM R & P and rebuilt it with a new 3.70 gear set. A good rule of thumb to follow is 70MPH=3.70 in 4th gear with a standard sized tire in the 205-70 X 15 or a 215-70 X 15 range. The best way to determine your gear ratio is to measure the "loaded rolling radius" of a rear tire and do the math. Mine runs 3000 @ 70 in 4th and 1900 @ 70 in 5th with the Tremec using 215-70 X 15 Michelin Hydro-Edge RadialsComment
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Re: mUNCIE REBUILDING
Dick,
see the attached site. Your hydro-edge tires should be about 26.9" in diameter. Using the site, you are going 65mph. You would need a 3.36 to go 71mph. This coincides with my car which has a 3.36 and I pull 3000rpms at about 70mph.
GeorgeComment
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Re: mUNCIE REBUILDING
Thank you George, I stand corrected. You are right. I had never seen that website before, but it certainly is good!Dick,
see the attached site. Your hydro-edge tires should be about 26.9" in diameter. Using the site, you are going 65mph. You would need a 3.36 to go 71mph. This coincides with my car which has a 3.36 and I pull 3000rpms at about 70mph.
George
My posting started with a request of members to find a good source for rebuilding a Muncie transmission. Do you know of any rebuilders in your area that you would have do your transmission work?
Sincerely, DickComment
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Re: mUNCIE REBUILDING
Dick,
my reason for pointing this out was so that you could be sure of your rear end ratio before changing out the trans. I had a '66 L72 and had no problem with it having a 3.36 rear, but you might be used to the, I am sure, explosive acceleration you have now, and not like the 2.20 first gear with this rear end. Best of luck.
GeorgeComment
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