Rearend for 700r4?
Racer
Joined: Oct 2001
Posts: 474
Likes: 64
From: Portage La Prairie Manitoba
If you want a good highway car, install a 3.36 rear gear. You will be turning about 2050 rpm at 70mph and the engine will not lug down on you in the 35-45 mph range.
If you want the car for being good off the line, you'll want a 3.73 rear gear. Anything steeper than that will render the first gear useless.
If you want the car for being good off the line, you'll want a 3.73 rear gear. Anything steeper than that will render the first gear useless.
Melting Slicks
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
My Art Carr trans is built to run flat out in 4th. Stock they will downshift to 3rd.
Mike
Racer
Joined: Oct 2001
Posts: 474
Likes: 64
From: Portage La Prairie Manitoba
What are you running for wheels and tires?
Safety Car
Joined: Jan 2009
Posts: 3,873
Likes: 25
If the th700r4 was a manual, It would be a ''wide ratio'' gear trans.
The the rpm spacing between each gear is wider, then narrower than the other.
Go with gm's thc2004r. Considered a close ratio. All the gears speeds are evenly spaced. Just an awesome trans in a c-3.
Found in G body's and elcaminos of the 80's. Low gears are calling your name.
Operators are standing by.........
The the rpm spacing between each gear is wider, then narrower than the other.
Go with gm's thc2004r. Considered a close ratio. All the gears speeds are evenly spaced. Just an awesome trans in a c-3.
Found in G body's and elcaminos of the 80's. Low gears are calling your name.
Operators are standing by.........
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Drifting
Joined: Jul 2009
Posts: 1,534
Likes: 14
From: Dallas-Fort Worth TX
Rebelrob, The governor determines the WOT max rpm shift point. The TV cable has more to do with when it shifts determined by the throttle position.
I bought two a 5000 and a 6500 for race days. It is a easy 5 minute change if the tranny has enough room for tunnel clearance. Just pop the side cap off and R&R the gov. Some people like to play with the weights and springs. I just bought mine preset from Art Carr the company not the person
I bought two a 5000 and a 6500 for race days. It is a easy 5 minute change if the tranny has enough room for tunnel clearance. Just pop the side cap off and R&R the gov. Some people like to play with the weights and springs. I just bought mine preset from Art Carr the company not the person
I thought I heard you have to drop the pan, which to mean equals 2-3 gallons of fluid all over the place. Didnt want to play that game...
Melting Slicks
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
Yeah, I remember the TRANS builder I got the trans from saying something about different springs, if I felt the shift points were not set up correctly.
I thought I heard you have to drop the pan, which to mean equals 2-3 gallons of fluid all over the place. Didnt want to play that game...
I thought I heard you have to drop the pan, which to mean equals 2-3 gallons of fluid all over the place. Didnt want to play that game...
It helps to get the rear of the car up higher than the front to keep from leaking much fluid out of the governor housing.
Mike
PS: I use a BTO TV cable adaptor on my Holley linkage. It allows you to adjust the starting point on the cable adjustment and how quickly it pulls the cable. I set mine more aggressively than stock. It is initially open farther than stock would be and is pulled out more at any throttle position in between closed throttle and open. This slightly raises shift points, but moreso raises fluid pressure at any throttle position up to full throttle, where it would be maxed. This helps the clutches live longer with a healthy engine driving at a lot of part throttle like on the street.
Last edited by v2racing; Jun 29, 2017 at 02:25 PM.
Safety Car
Joined: Jan 2008
Posts: 3,795
Likes: 435
From: Aarhus, Denmark
If the th700r4 was a manual, It would be a ''wide ratio'' gear trans.
The the rpm spacing between each gear is wider, then narrower than the other.
Go with gm's thc2004r. Considered a close ratio. All the gears speeds are evenly spaced. Just an awesome trans in a c-3.
Found in G body's and elcaminos of the 80's. Low gears are calling your name.
Operators are standing by.........
The the rpm spacing between each gear is wider, then narrower than the other.
Go with gm's thc2004r. Considered a close ratio. All the gears speeds are evenly spaced. Just an awesome trans in a c-3.
Found in G body's and elcaminos of the 80's. Low gears are calling your name.
Operators are standing by.........
My 69 Coupe, SBC Dart 427 EFI, TH2004R and 3.70 rear.
I would go for 3.70 rear with TH700 (or maybe 4.11)
Last edited by c3_dk; Jun 29, 2017 at 02:23 PM.
Drifting
Joined: Jul 2009
Posts: 1,534
Likes: 14
From: Dallas-Fort Worth TX
You don't have to drop the pan. The governor is under a dome cover on the driver side towards the rear of the tranny. You can get a kit from B&M with different springs and weights. They give you approximates on shift points but final adjustment is done by trial and error.
It helps to get the rear of the car up higher than the front to keep from leaking much fluid out of the governor housing.
Mike
PS: I use a BTO TV cable adaptor on my Holley linkage. It allows you to adjust the starting point on the cable adjustment and how quickly it pulls the cable. I set mine more aggressively than stock. It is initially open farther than stock would be and is pulled out more at any throttle position in between closed throttle and open. This slightly raises shift points, but moreso raises fluid pressure at any throttle position up to full throttle, where it would be maxed. This helps the clutches live longer with a healthy engine driving at a lot of part throttle like on the street.
It helps to get the rear of the car up higher than the front to keep from leaking much fluid out of the governor housing.
Mike
PS: I use a BTO TV cable adaptor on my Holley linkage. It allows you to adjust the starting point on the cable adjustment and how quickly it pulls the cable. I set mine more aggressively than stock. It is initially open farther than stock would be and is pulled out more at any throttle position in between closed throttle and open. This slightly raises shift points, but moreso raises fluid pressure at any throttle position up to full throttle, where it would be maxed. This helps the clutches live longer with a healthy engine driving at a lot of part throttle like on the street.
Its a later model 700 , apparently the earlier ones pre 86 or 87 were not built well.
Its been upgraded bigger cervo, better parts, I do not have a list, and a superior shift kit. I do know if I set that TV cable tighter, it will shift gears hard and snap yer neck a little. But I got it dialed back.
Problem was I told him I was upgrading to a BB and I needed it to handle the extra power/torque. But it was adjusted to a SB 350 crossfire when it was installed.
I have the adapater from Holley for the TV cable and I did buy some adapater from BTO a while back, but never installed it.
The trans per the builder is also as he put it dummy proof as to NOT have the trans burn up due to in proper TV cable adjustment. Not sure what he did.