Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C4 Tech/Performance
L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 10-14-2007, 09:04 AM   #81
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by ixlor8 View Post
Thanks Joe. I will be looking for a T-5. I would like to keep the cost down. I am going to keep the stock engine, so horse power is not an issue.

Do you have to do any changes for the speedometer?

About how many hours does it take to take out the Doug Nash 4+3 and replace with T-5?

Thank you very much for your help,
Speedo is a very good point. You will of course need to change the plastic drive and driven speedo gears in the transmission, for a total cost of about $18.00. (you won't find an fbody with a 2.59 rear end). Depending on the year of your vette, and year of the T5 you need to make sure you get the right VSS. If yours is cable, an 82-86 firebird/camaro VSS. If its 2 wire magnetic, an 87-89 firebird VSS. If its optical, 90-92 camaro/firebird.

As far as 'hours'. Not sure. I have a lift, tranny jack, stands, etc. You need to:

Disconnect battery
Remove the distributor
Lift vehicle
Put a stand under the oil pan to keep the engine from diving
Unbolt the driveshaft
Drain transmission/od fluids
Unbolt exhaust
Disconnect any wires, cables, linkage
Unbolt the cbeam
Unbolt the transmission

Probably about 3 hours with a lift + air tools. I had an automatic,
which came out in about 2 1/2 hours. But I'm doing cam too, so I also yanked the motor.
anesthes is offline   Reply With Quote
Old 10-14-2007, 10:05 AM   #82
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Looking for a T-5

Joe, I must say you have been a great help.

I am in the process of looking for a T-5.

Which transmission years should I be looking at?

'83-'92 V-8-powered Camaro and Firebird
1982-1992 Chevrolet Camaro (World-Class T-5 with RPO code MK6)
1993-2002 Chevrolet Camaro (V6 models) ?? Torque ratings lighter?

Rick
ixlor8 is offline   Reply With Quote
Old 10-14-2007, 05:22 PM   #83
Nitrofish86
Junior Member
 
Nitrofish86's Avatar
 
Member Since: Sep 2007
Location: Clarksville TN
Default

Any updates on this swap? I'm ready to do this right now if it works. Thanks-Charlie
Nitrofish86 is offline   Reply With Quote
Old 10-14-2007, 05:57 PM   #84
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Part Number Chart - 1984 to 1995 Corvette

Joe,

Is this information you wanted? Clutch / flywheel and more.



http://home.san.rr.com/khastings/ima...hpartslist.gif


Rick
ixlor8 is offline   Reply With Quote
Old 10-14-2007, 08:47 PM   #85
JLeatherman
CF Senior Member
 
JLeatherman's Avatar
 
Member Since: Sep 2006
Default

Man, I really wanna do this swap now too. I've got a 4+3 and it's only a matter of time till it's done now that the 383 is up and runnin'. Since I've already got a 4+3, I can leave my bellhousing and clutch on the car and the trans will bolt right in, right? If I can weld the shifter properly it will come out in the stock location? And with the C_beam adapter from ProStreet Customs it will fit the C_beam with a few modifications. Does the driveshaft need to be shortened? This might finally be an economical alternative to the 4+3...
JLeatherman is offline   Reply With Quote
Old 10-14-2007, 09:08 PM   #86
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by ixlor8 View Post
Joe, I must say you have been a great help.

I am in the process of looking for a T-5.

Which transmission years should I be looking at?

'83-'92 V-8-powered Camaro and Firebird
1982-1992 Chevrolet Camaro (World-Class T-5 with RPO code MK6)
1993-2002 Chevrolet Camaro (V6 models) ?? Torque ratings lighter?

Rick
93-02 won't work. You need a 82-92 camaro/firebird out of a V8. The world class T5's are better. Dont buy the first one you say, hold off for the right price. Junkyards want $300+.. Most local guys parting out cars get around $200.
anesthes is offline   Reply With Quote
Old 10-14-2007, 09:10 PM   #87
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by Nitrofish86 View Post
Any updates on this swap? I'm ready to do this right now if it works. Thanks-Charlie
I'm just waiting on the prototype cbeam adapter. Assuming I get it this week, i'll bolt it up and let pro street know if any changes need to be made. If not, I imagine they will be available almost immediately.
anesthes is offline   Reply With Quote
Old 10-14-2007, 09:12 PM   #88
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by JLeatherman View Post
Man, I really wanna do this swap now too. I've got a 4+3 and it's only a matter of time till it's done now that the 383 is up and runnin'. Since I've already got a 4+3, I can leave my bellhousing and clutch on the car and the trans will bolt right in, right? If I can weld the shifter properly it will come out in the stock location? And with the C_beam adapter from ProStreet Customs it will fit the C_beam with a few modifications. Does the driveshaft need to be shortened? This might finally be an economical alternative to the 4+3...

The shifter needs to be cut and welded so it comes up in the right spot.

The drive shaft should not need to be altered. Same yoke, and same length.

I'm not 100% sure on cbeam mods yet. With the T56 swap, you need to drill two new holes because the back of the tranny is weird, but on the T5 you should be able to make the bracket work with the stock cbeam holes. But thats pro streets part.

-- Joe
anesthes is offline   Reply With Quote
Old 10-14-2007, 09:48 PM   #89
Nitrofish86
Junior Member
 
Nitrofish86's Avatar
 
Member Since: Sep 2007
Location: Clarksville TN
Default

That sounds awesome, keep us all posted on how that adapter works out. I'm gathering parts as we speak
Nitrofish86 is offline   Reply With Quote
Old 10-14-2007, 11:36 PM   #90
Carl Johansson
CF Senior Member
 
Member Since: Sep 2004
Default

Holy smokes guys - reading all of this makes my head spin - seems like alot of work to save a few hundred bucks! In my 86, I just went with the Keisler TKO500 - made the swap in a day and a half - drives and shifts great after 2 years of abuse on road tracks - no issues to report!

Great gear ratios - of course I have it linked to a ZZ4 - so that may make some difference!

I'd much rather drive my car than work on it. For me, the extra money was worth the saved time and potential headaches! I could devote all that extra time to other projects I am working on! So instead of fooling with the Transmission in the car - I was building my Bonneville racer and going racing every couple of weeks with the 86. (the one with the TKO500)

Everyone is different - we all have different priorities, and skills I guess thats what makes it so much fun!

Carl "satisfied Tremek customer" Johansson

Carl Johansson
Carl Johansson is offline   Reply With Quote
Old 10-15-2007, 06:02 AM   #91
JLeatherman
CF Senior Member
 
JLeatherman's Avatar
 
Member Since: Sep 2006
Default

Carl,
I see where you're comin from, but it isn't a few hundred bucks. The cost of this T5 swap is about $3000 cheaper than the TKO kit. In a car like my 84 that's worth maybe $6-$7k, spending $3700 on a trans isn't what I want to do. $700 for a new trans is much more to my budget right now...
JLeatherman is offline   Reply With Quote
Old 10-15-2007, 06:50 AM   #92
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by Carl Johansson View Post
Holy smokes guys - reading all of this makes my head spin - seems like alot of work to save a few hundred bucks!
You obviously haven't read all of it. We're talking about a swap that will COMPETE with keisler but will only cost a few hundred bucks instead of $3k.

The 'headaches' will be exactly the same, since it's the same thing. Same basic transmission design (externally), same type of cbeam adapter. Same tunnel mods. The only 'diy' part will probably be the shifter, and even then
maybe we can work something out with pro street to mod stock fbody shifters on a trade-in basis.?.

The TKO is a nice transmission, like the ZF, like the T56, and so on. It's a matter of what you need. Considering the values of C4's have dropped like a rock, now that you can get into a C5 for under 20k, it doesn't make much sense putting a very expensive transmission in a C4.
If and when you decide to sell or trade the car in, nobody is going to give a rats behind that you spent 3k+ on a TKO..

-- Joe
anesthes is offline   Reply With Quote
Old 10-15-2007, 08:17 AM   #93
JLeatherman
CF Senior Member
 
JLeatherman's Avatar
 
Member Since: Sep 2006
Default

Quote:
Originally Posted by anesthes View Post
Speedo is a very good point. You will of course need to change the plastic drive and driven speedo gears in the transmission, for a total cost of about $18.00. (you won't find an fbody with a 2.59 rear end). Depending on the year of your vette, and year of the T5 you need to make sure you get the right VSS. If yours is cable, an 82-86 firebird/camaro VSS. If its 2 wire magnetic, an 87-89 firebird VSS. If its optical, 90-92 camaro/firebird.
Mine's an 84 with the 4+3 currently. Which VSS is it, the 2 wire magnetic or the optical? How can I tell? Also, mine's got the 3.07 rear right now. Anyone know what rears most Camaros came with?
JLeatherman is offline   Reply With Quote
Old 10-15-2007, 08:44 AM   #94
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Electrical Connections on Doug Nash 4+3

I have a 1984 Corvette shop Manual.

I see six electrical connectors, and Throttel valve cable on the Doug Nash 4+3:

1) 1st Gear Switch connector

2) 2nd gear switch connector.

3) 4th gear switch connector

4) Overdrive Solenoid Connector

5) E.S.S connector. Electron Speed Sensor

6) Backup light switch.

How do we handle the 1st gear, 2nd gear, 3rd gear and overdrive solenoid connectors on the T-5? Will we get an error code if they are disconnected?

E.S.S connector plugs into the overdrive unit of the Doug Nash. How do we connect this to the T-5 I do not see a speedometer cable it must be electronic.

Throtte valve cable - This cable is on the overdrive unit. This must act the same way like an automatic transmission. I do not think it is used on the T-5 because it does not have an overdrive.

Sorry for all the questions.
ixlor8 is offline   Reply With Quote
Old 10-15-2007, 08:47 AM   #95
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Richmond 6-Speed Corvette Installation Overview

I found this website last week. It tells the story about replacing the Doug Nash 4+3 with the Richmond 6-speed. Very interesting.

http://www.areddy.net/vettetrans/

Rick
ixlor8 is offline   Reply With Quote
Old 10-15-2007, 08:57 AM   #96
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Tach - function with the T5

I am guessing that the tach gets it signal from the Electronic Speed Sensor.

Where do you find the adapter for the plug in from the factory harness to the T-5 transmission?
ixlor8 is offline   Reply With Quote
Old 10-15-2007, 09:08 AM   #97
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by JLeatherman View Post
Mine's an 84 with the 4+3 currently. Which VSS is it, the 2 wire magnetic or the optical? How can I tell? Also, mine's got the 3.07 rear right now. Anyone know what rears most Camaros came with?
It's magnetic. Camaros came with all sorts of rears. You'll need to probably buy the two plastic gears. You'll need a magnetic VSS for a T5.
Should be fairly easy to come by.

i'll post pix when I get a chance.
anesthes is offline   Reply With Quote
Old 10-15-2007, 09:13 AM   #98
anesthes
CF Senior Member
 
anesthes's Avatar
 
Member Since: May 2006
Location: Salem NH
Default

Quote:
Originally Posted by ixlor8 View Post
I have a 1984 Corvette shop Manual.

I see six electrical connectors, and Throttel valve cable on the Doug Nash 4+3:

1) 1st Gear Switch connector

2) 2nd gear switch connector.

3) 4th gear switch connector

4) Overdrive Solenoid Connector

5) E.S.S connector. Electron Speed Sensor

6) Backup light switch.

How do we handle the 1st gear, 2nd gear, 3rd gear and overdrive solenoid connectors on the T-5? Will we get an error code if they are disconnected?

E.S.S connector plugs into the overdrive unit of the Doug Nash. How do we connect this to the T-5 I do not see a speedometer cable it must be electronic.

Throtte valve cable - This cable is on the overdrive unit. This must act the same way like an automatic transmission. I do not think it is used on the T-5 because it does not have an overdrive.

Sorry for all the questions.
ESS/VSS + backup switch will go to the transmission. The plugs are very standard with GM. (two wire post type).

No throttle valve cable needs connection.

As far as the solenoid connectors, you won't connect them. I'm not sure if you will get a code. I'm going to have to defer to someone whos had some experience with that end. On my '87 i'm running a computer from a '91 fbody (1227730) because I like MAP better than MAF for tuning.


-- Joe

Last edited by anesthes; 10-15-2007 at 09:15 AM.
anesthes is offline   Reply With Quote
Old 10-15-2007, 09:16 AM   #99
ixlor8
CF Senior Member
 
ixlor8's Avatar
 
Member Since: Sep 2007
Default Tach - function with the T5

I have been told that it comes from the distributor.
ixlor8 is offline   Reply With Quote
Old 10-15-2007, 09:24 AM   #100
JLeatherman
CF Senior Member
 
JLeatherman's Avatar
 
Member Since: Sep 2006
Default

Tach comes from the distributor

You will not get an error from leaving any of the gear switches out. My first gear switch has been bad on my 4+3 for a while and I bypassed it and it's been fine. You can probably remove all the gear switches.

O.D. Solenoid connector will be useless and can be removed.

ESS/VSS and Backup light will work fine. If they need adapting cut the plugs off the junkyard donor for the trans and solder them in.

TV cable can disappear cause it will now be useless

Last edited by JLeatherman; 10-15-2007 at 10:36 AM.
JLeatherman is offline   Reply With Quote
Old 10-15-2007, 09:24 AM
 
Go Back   Corvette Forum > C4 Corvettes, 1984 - 1996 > C4 Tech/Performance
Reload this Page 4+3 trans swaps
 
 
 
Reply

Tags
1985, 43, conversion, corvette, doug, manual, nash, overdrive, sale, speed, swap, tranny, trans, transmission, zf


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: 4+3 Trans blkvette85 C4 Parts for Sale/Wanted 0 08-01-2014 11:58 AM
4+3 88fastvet C4 General Discussion 2 06-22-2014 08:50 PM
4+3 Swap Question mazdaverx7 C4 General Discussion 10 01-14-2014 12:34 PM
4+3 Trans Fluid Change - NOT OVERDRIVE UNIT Waffle99 C4 General Discussion 6 08-14-2013 05:57 AM
1985 C4 4+3 trans overdrive question duzak C4 General Discussion 6 10-02-2012 09:47 AM


All times are GMT -4. The time now is 09:56 AM.


Emails & Password Backup