What's up
Thread Starter
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Senior Member
Joined: Sep 2006
Posts: 544
From: Flemington, NJ
What's up
No new posts and nobody commenting.
Maybe everyones on vacation.
Anyway, does anyone have the formula for figuring out a rearend gear ratio.
I thought it was rpm / tire size or something like that?
Schoon
Maybe everyones on vacation.
Anyway, does anyone have the formula for figuring out a rearend gear ratio.
I thought it was rpm / tire size or something like that?
Schoon
Last edited by SCHOON; Jun 16, 2009 at 08:13 PM.
Senior Member
Joined: Aug 2005
Posts: 243
From:
hey Schoon here check out this website i think it might be what our looking for http://www.richmondgear.com/101032.html
Senior Member
Joined: Sep 2006
Posts: 401
From: Michigan
Hey Schoon,
I agree there has been very little traffic on here lately. Don't know if it is just me but it seems since the format has changed we have been in a steady decline. Not only are the posts and replies down, but the advertisers are beginning to take over ( notice the drug ads!!) and it doesn't look as though anyone is monitoring these people. I haven't seen a post from Starship in quite a while either. Hope all is well with him. Oh weel, hopefully we get all of this corrected. I would hate to have to defect to another site as I am quite satisfied with all of the people here. Anyway getting back to youor post I think this will get you close:
Rear ratio = (2.98 times tire outer diameter in inches) divided by miles/hour per 1,000 rpm
Mike
I agree there has been very little traffic on here lately. Don't know if it is just me but it seems since the format has changed we have been in a steady decline. Not only are the posts and replies down, but the advertisers are beginning to take over ( notice the drug ads!!) and it doesn't look as though anyone is monitoring these people. I haven't seen a post from Starship in quite a while either. Hope all is well with him. Oh weel, hopefully we get all of this corrected. I would hate to have to defect to another site as I am quite satisfied with all of the people here. Anyway getting back to youor post I think this will get you close:
Rear ratio = (2.98 times tire outer diameter in inches) divided by miles/hour per 1,000 rpm
Mike
Banned
Joined: Oct 2007
Posts: 594
From: South Jersey
Here - save yourself some time.... stock tires are 27" tall
http://www.richmondgear.com/101032.html
And yes I agree that it is slow here. Me personally - I have ironed out most of the bugs on my '79 over the last 5 years and am now enjoying the car. Switching to the overdrive tranny was one of the best/most enjoyable upgrades I put in to the car. Next will be some slightly quiter mufflers, the Flowmasters are taking their toll on my hearing.
http://www.richmondgear.com/101032.html
And yes I agree that it is slow here. Me personally - I have ironed out most of the bugs on my '79 over the last 5 years and am now enjoying the car. Switching to the overdrive tranny was one of the best/most enjoyable upgrades I put in to the car. Next will be some slightly quiter mufflers, the Flowmasters are taking their toll on my hearing.
Senior Member
Joined: Dec 2005
Posts: 527
From: Killeen, Texas
DeeVeeEight,
You mentioned that the overdrive you installed is the best...Exactly what set-up do you have? I have always felt that the modified 2004r (because I like automatics and my '81 came w/ a th350)) would be the best choice (f/ me) due to the close gearing and being the same length as the th350 and therefore the original drive shaft can be used along w/ everything else (spinning the tail mount around...). I am interested in what set-up you have, as I know that you've been "around the block" w/ your 'Vette.
As f/ the site slowing up lately, I've noticed the same. I've tried to reply to topics that I'm familiar w/ as I've always done here and on any of the sites that I frequent.
I have mentioned that I see very few, in general, older 'Vettes anymore (I know this has nothing to do w/ the lack of posts on the site) on the road, including C3s. I see alot of the newer 'Vettes, but most (and I KNOW not all) of the guys who drive the new ones just have one due to having a pocket full of money and have the dealership maintain and do the fixing on them. Very few of those guys turn their own wrenches. I like the fact that there are fewer C3s around, as that makes mine alittle "cooler." LOL.
I do know that the hardships of the crumby economic situation in the USA have hit the big towns much harder than the out-lying areas-all here being in pretty good shape and my family in New York telling me how bad things have gotten there in such a short period of time.-and I'm wondering if this has had an overall effect on the site. All the frills have been eliminated from the lives of the people who have been hard-hit by the slumping economy. My brother was telling me that he was looking at older Miatas as all of a sudden he's seen afew f/ sale, and afew happened to be cars that were kept at summer houses and only driven when the people were vacationing there in the summer. In some cases, the cars and the houses were being sold. Are we seeing enough people tight on money where they may not be selling their 'Vette, but possibly not having the extra money to dump into their expensive hobby, therefore the 'Vette scene being put on the back burner, and interests right now are to do w/ making ends meet? I suppose it would be possible. I put a tarp on my '62 Ford pick-up, a ride I've had f/ twenty three years, as I'm getting things together to build an engine f/ the 'Vette and am waiting to do the frame work, etc. that I'll eventually do on the truck. I've also quit posting alot on the classic truck sites due to my concentration on the 'Vette. I'm just saying, something could very well be more important right now f/ a number of the members and their economic situation could very well be one of them.
Hope I didn't get carried away w/ this topic. Just some thoughts...
You mentioned that the overdrive you installed is the best...Exactly what set-up do you have? I have always felt that the modified 2004r (because I like automatics and my '81 came w/ a th350)) would be the best choice (f/ me) due to the close gearing and being the same length as the th350 and therefore the original drive shaft can be used along w/ everything else (spinning the tail mount around...). I am interested in what set-up you have, as I know that you've been "around the block" w/ your 'Vette.
As f/ the site slowing up lately, I've noticed the same. I've tried to reply to topics that I'm familiar w/ as I've always done here and on any of the sites that I frequent.
I have mentioned that I see very few, in general, older 'Vettes anymore (I know this has nothing to do w/ the lack of posts on the site) on the road, including C3s. I see alot of the newer 'Vettes, but most (and I KNOW not all) of the guys who drive the new ones just have one due to having a pocket full of money and have the dealership maintain and do the fixing on them. Very few of those guys turn their own wrenches. I like the fact that there are fewer C3s around, as that makes mine alittle "cooler." LOL.
I do know that the hardships of the crumby economic situation in the USA have hit the big towns much harder than the out-lying areas-all here being in pretty good shape and my family in New York telling me how bad things have gotten there in such a short period of time.-and I'm wondering if this has had an overall effect on the site. All the frills have been eliminated from the lives of the people who have been hard-hit by the slumping economy. My brother was telling me that he was looking at older Miatas as all of a sudden he's seen afew f/ sale, and afew happened to be cars that were kept at summer houses and only driven when the people were vacationing there in the summer. In some cases, the cars and the houses were being sold. Are we seeing enough people tight on money where they may not be selling their 'Vette, but possibly not having the extra money to dump into their expensive hobby, therefore the 'Vette scene being put on the back burner, and interests right now are to do w/ making ends meet? I suppose it would be possible. I put a tarp on my '62 Ford pick-up, a ride I've had f/ twenty three years, as I'm getting things together to build an engine f/ the 'Vette and am waiting to do the frame work, etc. that I'll eventually do on the truck. I've also quit posting alot on the classic truck sites due to my concentration on the 'Vette. I'm just saying, something could very well be more important right now f/ a number of the members and their economic situation could very well be one of them.
Hope I didn't get carried away w/ this topic. Just some thoughts...
Thread Starter
|
Senior Member
Joined: Sep 2006
Posts: 544
From: Flemington, NJ
I just did the math for my rear end gear ratio and to my suprise I have 3:08 gears.
I always thought I had 3:36 gears.
Maybe this is why I am getting fairly good gas milage and more RPM's out of my 4 speeds.
Since the price of ags is going up I think I will leave well enough alone.
Schoon
I always thought I had 3:36 gears.
Maybe this is why I am getting fairly good gas milage and more RPM's out of my 4 speeds.
Since the price of ags is going up I think I will leave well enough alone.
Schoon
Banned
Joined: Oct 2007
Posts: 594
From: South Jersey
Hello Texas Jim, It has been a while....
The transmission that I have is a manual transmission, it is a Tremec TKO II. The TKO II is kind of obscure because it was replaced rather quickly by the current TKO 500/600 transmissions (not that there is anything wrong with it). It has an .82 overdrive, the first 4 gears being just like a normal 4 speed. The TKO transmissions are top loaders meaning that the stick shift comes out of the top of the transmission rather than being side mounted like a traditional Hurst/Muncie/Saginaw type set up. I have 3.25 rear gears and with the .82 overdrive my highway cruising RPM's are between 1500 and 2500 with 2500 being too fast to be legal in this country (haha). The TKO II that I got was a (cough) Ford unit but the guy I bought it from had a blow-proof bell housing that adapted the TKO II to the small block chevy. Everything was brand new, the guy changed his mind and decided to go with an automatic, that is how I came across it. The new TKO trannies are too expensive for me, the TKO II I got was a great deal. With the old transmission (a Richmond) I did not have overdrive and highway cruising RPM's were around 3000 RPM, too high for any extended driving.
Here's a shot from underneath, not much to see though...
and here's a shot of the top loader shifter....
you can see that the shifter needed to be moved about 2" to the left, a bracket was fabbed up for that.
The console was also modified and an aftermarket rubber boot adapted to the console.
finished!
The transmission that I have is a manual transmission, it is a Tremec TKO II. The TKO II is kind of obscure because it was replaced rather quickly by the current TKO 500/600 transmissions (not that there is anything wrong with it). It has an .82 overdrive, the first 4 gears being just like a normal 4 speed. The TKO transmissions are top loaders meaning that the stick shift comes out of the top of the transmission rather than being side mounted like a traditional Hurst/Muncie/Saginaw type set up. I have 3.25 rear gears and with the .82 overdrive my highway cruising RPM's are between 1500 and 2500 with 2500 being too fast to be legal in this country (haha). The TKO II that I got was a (cough) Ford unit but the guy I bought it from had a blow-proof bell housing that adapted the TKO II to the small block chevy. Everything was brand new, the guy changed his mind and decided to go with an automatic, that is how I came across it. The new TKO trannies are too expensive for me, the TKO II I got was a great deal. With the old transmission (a Richmond) I did not have overdrive and highway cruising RPM's were around 3000 RPM, too high for any extended driving.
Here's a shot from underneath, not much to see though...
and here's a shot of the top loader shifter....
you can see that the shifter needed to be moved about 2" to the left, a bracket was fabbed up for that.
The console was also modified and an aftermarket rubber boot adapted to the console.
finished!
DeeVeeEight,
You mentioned that the overdrive you installed is the best...Exactly what set-up do you have? I have always felt that the modified 2004r (because I like automatics and my '81 came w/ a th350)) would be the best choice (f/ me) due to the close gearing and being the same length as the th350 and therefore the original drive shaft can be used along w/ everything else (spinning the tail mount around...). I am interested in what set-up you have, as I know that you've been "around the block" w/ your 'Vette.
As f/ the site slowing up lately, I've noticed the same. I've tried to reply to topics that I'm familiar w/ as I've always done here and on any of the sites that I frequent.
I have mentioned that I see very few, in general, older 'Vettes anymore (I know this has nothing to do w/ the lack of posts on the site) on the road, including C3s. I see alot of the newer 'Vettes, but most (and I KNOW not all) of the guys who drive the new ones just have one due to having a pocket full of money and have the dealership maintain and do the fixing on them. Very few of those guys turn their own wrenches. I like the fact that there are fewer C3s around, as that makes mine alittle "cooler." LOL.
I do know that the hardships of the crumby economic situation in the USA have hit the big towns much harder than the out-lying areas-all here being in pretty good shape and my family in New York telling me how bad things have gotten there in such a short period of time.-and I'm wondering if this has had an overall effect on the site. All the frills have been eliminated from the lives of the people who have been hard-hit by the slumping economy. My brother was telling me that he was looking at older Miatas as all of a sudden he's seen afew f/ sale, and afew happened to be cars that were kept at summer houses and only driven when the people were vacationing there in the summer. In some cases, the cars and the houses were being sold. Are we seeing enough people tight on money where they may not be selling their 'Vette, but possibly not having the extra money to dump into their expensive hobby, therefore the 'Vette scene being put on the back burner, and interests right now are to do w/ making ends meet? I suppose it would be possible. I put a tarp on my '62 Ford pick-up, a ride I've had f/ twenty three years, as I'm getting things together to build an engine f/ the 'Vette and am waiting to do the frame work, etc. that I'll eventually do on the truck. I've also quit posting alot on the classic truck sites due to my concentration on the 'Vette. I'm just saying, something could very well be more important right now f/ a number of the members and their economic situation could very well be one of them.
Hope I didn't get carried away w/ this topic. Just some thoughts...
You mentioned that the overdrive you installed is the best...Exactly what set-up do you have? I have always felt that the modified 2004r (because I like automatics and my '81 came w/ a th350)) would be the best choice (f/ me) due to the close gearing and being the same length as the th350 and therefore the original drive shaft can be used along w/ everything else (spinning the tail mount around...). I am interested in what set-up you have, as I know that you've been "around the block" w/ your 'Vette.
As f/ the site slowing up lately, I've noticed the same. I've tried to reply to topics that I'm familiar w/ as I've always done here and on any of the sites that I frequent.
I have mentioned that I see very few, in general, older 'Vettes anymore (I know this has nothing to do w/ the lack of posts on the site) on the road, including C3s. I see alot of the newer 'Vettes, but most (and I KNOW not all) of the guys who drive the new ones just have one due to having a pocket full of money and have the dealership maintain and do the fixing on them. Very few of those guys turn their own wrenches. I like the fact that there are fewer C3s around, as that makes mine alittle "cooler." LOL.
I do know that the hardships of the crumby economic situation in the USA have hit the big towns much harder than the out-lying areas-all here being in pretty good shape and my family in New York telling me how bad things have gotten there in such a short period of time.-and I'm wondering if this has had an overall effect on the site. All the frills have been eliminated from the lives of the people who have been hard-hit by the slumping economy. My brother was telling me that he was looking at older Miatas as all of a sudden he's seen afew f/ sale, and afew happened to be cars that were kept at summer houses and only driven when the people were vacationing there in the summer. In some cases, the cars and the houses were being sold. Are we seeing enough people tight on money where they may not be selling their 'Vette, but possibly not having the extra money to dump into their expensive hobby, therefore the 'Vette scene being put on the back burner, and interests right now are to do w/ making ends meet? I suppose it would be possible. I put a tarp on my '62 Ford pick-up, a ride I've had f/ twenty three years, as I'm getting things together to build an engine f/ the 'Vette and am waiting to do the frame work, etc. that I'll eventually do on the truck. I've also quit posting alot on the classic truck sites due to my concentration on the 'Vette. I'm just saying, something could very well be more important right now f/ a number of the members and their economic situation could very well be one of them.
Hope I didn't get carried away w/ this topic. Just some thoughts...