TH200-4R ID Codes - Impala Tech
Transmission & Driveline Transmissions & Differentials

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post #1 of 7 (permalink) Old 06-18-2010, 06:33 PM Thread Starter
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TH200-4R ID Codes

I have spent hours trying to interpret a trans code on a 200R4 I found as a core. It came out of an 86 Monte SS. Everything I read says that car should have a CZF trans to ensure it has the better valve body and internals like the Grand National. I don't want to start with a standard 200R4 with its weak internals.

The codes on this trans are KCF in large letters, then 242-86KCF0134 under that. Can anyone find a reference that will tell me if this is one of the better cores to start with?

Thanks for your help guys. I can't seem to clarify what this guy has, but I don't want to lose it if it is one of the better transmissions.

Last edited by palalt; 06-19-2010 at 10:04 AM.
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post #2 of 7 (permalink) Old 06-18-2010, 07:54 PM Thread Starter
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I found this on a 442 site. Seems to be the best explanation I've found. But it still doesn't explain my KCF number. >

[ Thanks to Thomas Martin for this information. ]


The tail shaft is not removable - it is part of the trans housing casting.
Pan Shape
The TH-200-4R has an unusually shaped pan that almost looks like 2 parts. But the pan looks very different than the TH-350. It has a main pan and what looks like a small secondary pan at the rear. All TH-2004Rs have the word "M E T R I C" stamped on the bottom.

TH-200-R4 ID's:ID Year(s) Application KZF ** Olds 442/Hurst, CZF ** Monte SS, BRF ** GN/T-Type/Turbo Regals, OZ ** Hurst OldsOM Olds 350 Diesels
OG Olds 307, BY V-6 252 Cars, AA and AP Cadillac's.
Transmissions marked "**" have a special (better for performance) valve body, plate, 1-2 servo, 3-4 servo, 2-3 intermediate servo, and governor.

These codes can be found on the passenger side of the transmission near the output shaft. Sometimes they are hard to read due to the catalytic convertor getting in the way. The valve body itself will have the first two letters painted on it. Be careful because the paint comes off easily. The special valve bodies usually have a purple strip on them also.
TH-200-R4 ID's:
ID Year(s) Application
KZF ** Olds 442/Hurst
CZF ** Monte SS
BRF ** GN/T-Type/Turbo Regals
OZ ** Hurst Olds
OM Olds 350 Diesels
OG Olds 307
BY V-6 252 Cars
AA and AP Cadillac's
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post #3 of 7 (permalink) Old 06-20-2010, 01:31 AM
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Found this on Hemmings.

The TH200-4R can be identified by its odd-shaped 16-bolt pan, which roughly resembles the state of Nevada (check your maps), and the transmission pan bolts have 13mm heads. The TH200-4R was used in GM rear-wheel-drive cars equipped with the 231 Buick, 301 Pontiac, the Oldsmobile 307, as well as the 350 gas and 350 diesel engines from 1981-'90. Many Chevrolet 267 and 305 engines also used the TH200-4R with a multi-fit bellhousing. You can look for one in any of these vehicles with those engine sizes:

1981-'88 Buick LeSabre and Electra RWD
1981 Century
1981-'87 Regal
1981-'90 Cadillac Fleetwood, Deville and Brougham
1982-'90 Chevrolet Impala and Caprice
1981-'88 Chevelle, Monte Carlo, Malibu and El Camino
1984-'87 GMC Caballero
1982-'90 Olds Delta 88, 98 and Custom Cruiser
1983-'88 Olds Cutlass 4-4-2 and Supreme
1983-'89 Pontiac Bonneville, Parisienne and Safari Wagon
1981 Pontiac Firebird with 301
1984-'87 Pontiac Grand Prix

The transmission identification is on a plate on the right side of the case towards the tailshaft. This ID tag is usually held on by one rivet. The plate will have a two- or three-letter transmission code in large letters, and then a 13- or 14-digit identification number along the bottom:

1st digit: month of production (A through M, skipping the letter "I")
2nd-3rd: production day of the month
4th: shift transmission was produced (1st-3rd shift)
5th: assembly plant (T: Three Rivers, MI; J: Windsor, Canada; W: Warren, MI)
6th-7th: decade and year
8th-9th: or 8th-10th: transmission ID code
10th-13th: or 11th-14th: transmission serial number

Ape Out.

Make: Chevrolet
Model: Impala Custom
Year: 1969
Doors: 2
Engine: 327 V8
Trans: Powerglide
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post #4 of 7 (permalink) Old 06-21-2010, 10:04 AM Thread Starter
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Thanks Lawrence. I saw that Hemmings article too, but it still doesn't explain my KCF code. It just says how to break down the numbers on the actual trans. I'm afraid this KCF trans has the standard internals, so I'll probably keep looking for a different 200r4.
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post #5 of 7 (permalink) Old 06-23-2010, 11:23 AM
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that's a 442 200r4.
has a little better valve body than regular 200r4's,but not like the Grand National valve body

make sure you get the right governor/speedo gear.the one in that one is set up for 3.73 gears,WOT shift point is 4800 rpm
GN governors have a 5000 rpm WOT shift point
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post #6 of 7 (permalink) Old 06-23-2010, 01:39 PM Thread Starter
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Andy, Thanks for the reply. The charts I've seen show KZF as the 442 code. Where did you find KCF listed?
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post #7 of 7 (permalink) Old 06-24-2010, 01:10 PM
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i misread your code

KCF is for a 1987 307 Olds,probably came out of Buick LeSabre or Delta 88 station wagon
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