I'm looking at getting a 200-4R installed in my 77, L48, Turbo 350, with the stock Quadrajet. Will the TV cable attach in the same spot as the stock downshift cable, or do I need an adapter?

 

No you will need these two pieces.

http://www.summitracing.com/parts/tc...MobileSwitchNo

http://www.summitracing.com/parts/tc...0/applications

 

It's not ideal, the geometry is different for the 2004r. I found a swap meet carb from a th700r4 set up and swapped the throttle shaft into my original carb.

 

Eh, driveability wise, my 200 trans that I built with all the trick parts and shift kits.....I put the cable to my gas pedal, an up/over inside the cabin, had a tab mounted on the support brace on my '72 and so feed the pedal directly....slams shifts pretty good.....

 

Here is what has been working for me. Figure 17 on the left.

 

i used bowtie overdrive adapters to connect the 700r4 in my '72
had to modify the throttle cable bracket to accept the trans cable setup.

 

The 'geometry' of the TV cable-to-linkage connection is VERY important. It MUST be set up so that TV pressure will increase as the throttle is depressed AND TV pressure must reach maximum a bit BEFORE max throttle position is achieved. Your best method for assuring proper TV pressure operation is to tap a pressure gauge into the 'TV pressure' port on the left side of the transmission case.

You can either purchase the necessary adapter to mate with YOUR carb linkage so that the TV pressure schedule is correct, or you can put a pressure gauge on the trans and WATCH what the pressure due throughout the throttle range.

Either way, it has to be set correctly. If not, you get very harsh shifts OR you get fried clutches.

 

I am working on the same project for my 79 Vette with the quadrajet carb. Rebuilding a 2004r for it. I was wondering what your final solution was for brackets and linkage to hook up the TV cable. Any help and pictures would be appreciated.

 

6 year old post and he hasn't been around for the last 3 or 4 years. Better to start a new post asking for input
M

 

Hey Oldtimer79. Hoping you'll start a new thread on this as I'm dumping my '80 L82 (and 'best guess' parts) off to my friend, next week to do this 2004r conversion. I'm nervous because the car is totally
stock (QJet, original exhaust, etc.) and BTO wasn't sure that their replacement 80-81 2004r Crossmember would play well with the exhaust, etc, etc... Good to see someone else is considering this
conversion, because at this point, I figured I was the last one to join this party - ha!

 

,,,

 

Your original cross member will work just fine if you currently have a TH350 . The extension to the TH350 mount (2 pieces) will both unbolt from the crossmember and the 2004r will bolt up to your current crossmember, minus the extensions, with little to no effort. Original exhaust should not be affected. It will depend on where the pipe from the left manifold crosses over to join the right side. Should be OK. check out this web site and scroll through the pictures.1980 Chevrolet Corvette (americanmusclecarmuseum.com) It will show the placement of the original exhaust system. Looks like enough room for the 2004r to tuck up in there in front of the transmission mount. I am not able to absolutely assure you of this as I am just going by what I have on my car. I don't know I have headers and dual exhaust which are nice for a few more horse power. The pipes currently run through the holes in the cross member. I am planning on doing some work on my cross member and run my exhaust straight back off the header and then making the turns behind my crossmember to go on towards the rear end in the proper place. I will run 2-1/2" pipes off the headers right back to the mufflers. I am currently just cleaning up up my tranny pan and case in preparing for a tear down. The rebuild kit I'm looking at is from CK Transmissions. STREET AND STRIP MASTER REBUILD KIT WITH BILLET DRUM AND BILLET SERVO (ckperformance.com). I'm still researching my TV cable hook up. Some Q-jets have the factory hook up and there info out there how to adapt what we have. If you want to chat my e-mail is zx10ninja88@hotmail.com. use a subject matter so I'll know it's you. John

I like this style of crossmember. I think I'll alter mine so my pipes will go underneath like this or similar.

 

Hey John - Thanks for the Reply/ Links! I think the Crossmember got changed for the '80 and '81. When I looked up at it, it didn't appear to be 2-piece, but I have the CM from BTO anyway, so, hopefully one of the two options will work. The gentleman that rebuilt the 2004r for me, handed me the 'Detent Cable' as seen in the first pic of parts. He said that will work fine when replacing the TH350 Kickdown Cable with the Detent Cable for the 2004r. The 3rd pic shows where the TV Cable Housing end will clip into the bracket right below where the White Inline Filter (Vac) is. The adjustable end (lengthwise) of the inner cable will clip onto that Pin where the end of the Kickdown cable is currently. The pin I'm referring to is shown below the short black plastic sheathing at the end of the Throttle Cable (above). My car has factory cruise and that's the cable that's most outboard of the throttle lever. Does this setup look similar to yours? My goal is just to get the car home from the shop, after the physical tranny swap, etc., without burning out the tranny (it's 2 miles downhill - ha). Then I'll go forward with verifying the 'pressures' like 7t1vet says...

 

My carb set up is the same as yours. My cross member is only a one piece unit. The two pieces I was referring to bolt to it at the center and extend forward to bolt to the 350 tranny mount. These 2 pieces are removed and not used for the 2004r as the mounting holes are further back than the 350 mounting holes. I just assumed your mount was the same. I replaced my speedometer bullet and Transmission mount last winter and had to disassemble these 2 pieces to install the new mount and then bolt them back in place as space is at a premium on these old girls. lol. Thanks for sharing your info and pictures. Everything I have read on these tranny builds says you should have your TV cable hooked up and adjusted properly before driving your car. Without proper pressures being sent to their specific destination via the TV valve in the valve body a person can damage the clutches in as little as a quarter mile. I would advise getting your tv cable on your carb set properly before driving it home. I believe it will be time well spent. If in doubt call the tech dept. at BTO or Ryan at Performabuilt Transmiissions 570-578-5686, and a final number, David Husek at Turbo Buick performance 516-285-1103. You'll get the right advice. A call to the pros may save you a world of heartache. Here's a link to a 2004r group you may find interesting. /www.facebook.com/groups/2195342030751087. Keep in touch and best of luck with your project. John
Please post a picture of your carb tv set up once complete.

 

Tranny Swap won't happen until week after next now. Will post pic(s) afterwards. Thanks, Later!

 

I have the 200-4R ,the location of the detent on your throttle plate lever WILL NOT work for the TV cable.This is where it needs to be for the correct geometry It needs to be relocated per schematic above.See post #5 above figure 16. This part is avail from www.Danchuk.com

 

Thanks gjohnson. Yeah, my friend doing the tranny swap/ related parts install won't have the patience to do the 'fine geometry' of Fig 16 above. I've got to decide how to get it home (with no fried clutches) after he gets the work done. I live 2mi away from his shop, all downhill. I won't need to get into the throttle much (range of motion) to get home.. Maybe set the TV cable extra snug, deal with the hard shifts and take some aspirin after crawling into the house...

 

This is how the math worked out when I setup on my Holley

 

Thanks Redwing. Converting degrees of rotation to a numerical measurement makes sense to me. I've been wondering how folks are measuring the 'degree' measurements in Fig 16 when setting up the 'Cable Mounting Post' - Is there an instrument used for this? Also, is there a Specified Measurement of the distance between the End of the TV Cable Housing and, I don't know the center of the Throttle shaft or Cable Mounting Post? It seems the further away the cable housing end is, the less the cable is going to angle/ dip down, bottom out and then rise up to WOT, netting a more linear pull of the TV cable?

 

Quadra Jet *23deg from throttle plate center/@1.1 inches down from center point. I googled 23deg and traced it off screen and transfered it to carb then measured down 1.1" and rotated new adapter to that point. You must drill out old hook up to attach new one. All line pressures were within spec.