200-4R Rebuild - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

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post #1 of 55 (permalink) Old Dec 12th, 19, 2:51 AM Thread Starter
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200-4R Rebuild

I want to install a 200-4R transmission in my 64 El Camino since I won't have to shorten the driveshaft but would like to save money by doing the rebuild myself if possible. Pretty much the only mechanical background I have is rebuilding a 10 bolt rearend. I'll also be installing a low mile 350 engine. Rebuilding a transmission seems pretty daunting but is it possible with help in this forum and elsewhere online?

A local salvage yard has a 200-4R available from a Cadillac Deville for less than $200, but looks like that doesn't include the pump or valve body. Would I need to upgrade the valve body, reverse boost valve, servo and governor assembly? I don't think I can afford a billet torque converter. What flex plate is decent? What other parts and rebuild kit would I need?
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post #2 of 55 (permalink) Old Dec 12th, 19, 8:48 AM
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Re: 200-4R Rebuild

Keep looking till you can find one that's complete, you might even be able to find one that's in good working condition.

Jim

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post #3 of 55 (permalink) Old Dec 12th, 19, 9:21 AM
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Re: 200-4R Rebuild

Itís possible if you have the tools and aptitude. There are people that can help you through every step of the way. I would purchase a rebuild manual to begin with.

However, I wouldnít start with that core. I agree with the advice to buy something complete and possibly working already. You will be miles ahead.

That said, donít overlook the the turbo 350s and 400s which are easier to rebuild and less finicky than the 200 to set up.

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post #4 of 55 (permalink) Old Dec 12th, 19, 1:19 PM
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Re: 200-4R Rebuild

hi
Buying used is best to get complete. Many problems / issues are inherited when buying partially stripped . Almost always it costs more in the long run. Best way is to get a running trans with some warranty . Change tranny for application and install .
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post #5 of 55 (permalink) Old Dec 12th, 19, 1:57 PM Thread Starter
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Re: 200-4R Rebuild

I'm going to get a complete tranny from the Cadillac with the salvage yard's warranty, if it doesn't work they'll let me pull another one. One option is to just install the 30 year old transmission and see how it works but if I want to learn how to rebuild it and have the benefit of knowing it's rebuilt now I won't have to worry about doing it in the near future. What parts are essential to replace now that aren't in rebuild kits? Any transmission specialists here that can point me in the right direction?
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post #6 of 55 (permalink) Old Dec 12th, 19, 2:47 PM
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Re: 200-4R Rebuild

Just as an fyi, there are better 2004Rs than others. off the top of my head, its the Monte Carlo SS, and Grand National that are the favorite of the bunch. If you search around you will find the codes of the "better" ones online. I picked one up from a MCSS for $212, threw a new front seal at it, and let her rip.
Read as much as you can about setting up the TV cable before hand.
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post #7 of 55 (permalink) Old Dec 12th, 19, 3:15 PM Thread Starter
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Re: 200-4R Rebuild

I can't find a Monte Carlo SS 2004R tranny in my area. The list https://www.chevelles.com/forums/33-...t-200-4rs.html

I'll read more about proper TV cable installation but what else do you guys suggest to do in the removal and installation process if I try the Cadillac transmission as is? Or are there a few things I can replace without a complete tear down and rebuild? Steel vane rings? Can I use the Cadillac torque converter with my 350?
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post #8 of 55 (permalink) Old Dec 12th, 19, 3:28 PM
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Re: 200-4R Rebuild

Depending on the year of the transmission, TCI makes a constant pressure valve body for the 2004R. It takes away the worry of having an improperly adjusted TV cable.

https://www.summitracing.com/search/...n-valve-bodies

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post #9 of 55 (permalink) Old Dec 12th, 19, 4:01 PM
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Re: 200-4R Rebuild

Does the Cadillac unit have the right bellhousing?
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post #10 of 55 (permalink) Old Dec 12th, 19, 4:40 PM
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Re: 200-4R Rebuild

Quote:
Originally Posted by Tommy the Cat View Post
Does the Cadillac unit have the right bellhousing?
This is the million dollar question.

Edit - list linked to above, says 81-90 caddy. so, i guess it does? I would investigate further to be sure.
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post #11 of 55 (permalink) Old Dec 12th, 19, 4:41 PM Thread Starter
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Re: 200-4R Rebuild

I thought most of the 200-4R cases have the dual Chevy/BOP pattern, including the Cadillac. Does anyone know if the Cadillac deville has the saddle bellhousing?
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post #12 of 55 (permalink) Old Dec 12th, 19, 5:07 PM
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Re: 200-4R Rebuild

I don't know anything about 200-4Rs. They could have dual patterns. Seems like I read that about some GM transmission years ago.

70 Camino...Roller

69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt

76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt
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post #13 of 55 (permalink) Old Dec 12th, 19, 7:09 PM
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Re: 200-4R Rebuild

Quote:
Originally Posted by Tommy the Cat View Post
I don't know anything about 200-4Rs. They could have dual patterns. Seems like I read that about some GM transmission years ago.
Most do but I've heard talk of some with single pattern.
Best to look before you pull it.

Jim

77 Monte
421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. from Jake 200-4r w/ 3.73's
Machine work by Torvinen's machine
11.93 @ 112.7 & tuning
67 Imp.SS for the wife 275 hp 327-TH350
77 cruiser is online now  
post #14 of 55 (permalink) Old Dec 12th, 19, 7:10 PM
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Re: 200-4R Rebuild

http://web.archive.org/web/200701281.../thm2004r.html

Jim

77 Monte
421 Profilers ported by Eric Weingartner, Straub HR 3200 conv. from Jake 200-4r w/ 3.73's
Machine work by Torvinen's machine
11.93 @ 112.7 & tuning
67 Imp.SS for the wife 275 hp 327-TH350
77 cruiser is online now  
post #15 of 55 (permalink) Old Dec 12th, 19, 7:34 PM
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Re: 200-4R Rebuild

I did research before i bought a 2004r. Based on my research the following codes were deemed to be most desirable. CZ-BF-CQ. I would make sure the cad bell housing matches your engine. Hope this helps. Terry
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