200-4R Question
#1
09-12-2010, 02:50 PM
200-4R Question
Just out of curiosity, i'd be interested to know what other engines might work with my transmission. My coach is severely underpowered, and some day, i would like to put a more powerful engine in it.
My 85 Fleetwood Brougham chassis has the 4.1L with the 200-4R transmission.
According to the factory manual, 1985 had an option for a 5.7L diesel with the same transmission.
The limo/commercial chassis for 1985 would have been a 6.0L carb or DFI with a Type 400 transmission.
Clearly a 6.0 DFI would be the best choice for miss abigail, i think. However, i wonder if a standard chevy 5.7 small block gasoline engine would mount up to the 200-4R. Anyone know of any other engines that would mount up off hand?
My 85 Fleetwood Brougham chassis has the 4.1L with the 200-4R transmission.
According to the factory manual, 1985 had an option for a 5.7L diesel with the same transmission.
The limo/commercial chassis for 1985 would have been a 6.0L carb or DFI with a Type 400 transmission.
Clearly a 6.0 DFI would be the best choice for miss abigail, i think. However, i wonder if a standard chevy 5.7 small block gasoline engine would mount up to the 200-4R. Anyone know of any other engines that would mount up off hand?
#2
09-12-2010, 02:58 PM
from wikipedia:
200-4R
This seems to imply this particular engine should work with lots of different GM engines.
200-4R
In 1982, the 2004R (sometimes called 200R4) was introduced for use in GM vehicles. Internally, the components which were prone to failure in the THM200 were improved, and this transmission was used with high-power applications — primarily the Buick Grand National and the 1982 Chevy Corvette. GMs powered with the Oldsmobile 5.7 L Diesel powerplant were coupled with the 200-4R in place of the 200. The 200-4R was configured with several different torque converters and gear ratios depending on the vehicle application.
Unlike the 700R4, the 200-4R has a multicase bellhousing for use with Chevrolet, Buick/Olds/Pontiac (BOP), and Cadillac powerplants. Since the external dimensions are similar to the THM-350, 200-4Rs are usually swapped in place of THM-350s in older vehicles to provide an overdrive gear. Edit note: The TH400 is more of a close mounting match to the 200-4R. Placement of the mount is identical. Only the yoke needs to be changed in most cir***stances.
Early models had PRND321 on the cluster, while later models had PRNDD21, with the left D identified as the overdrive gear by a square or oval ring.
The THM200-4R was phased out after 1990 — its final usage was in the GM B-body lineup (Chevrolet Caprice, Oldsmobile Custom Cruiser station wagon, Cadillac Brougham) coupled to either a Chevrolet 305 or an Oldsmobile 307 engine. It is believed that an HD version of the 200-4R was used in the late 80s Caprice 9C1 police package using the internals from the Buick Grand National.
Unlike the 700R4, the 200-4R has a multicase bellhousing for use with Chevrolet, Buick/Olds/Pontiac (BOP), and Cadillac powerplants. Since the external dimensions are similar to the THM-350, 200-4Rs are usually swapped in place of THM-350s in older vehicles to provide an overdrive gear. Edit note: The TH400 is more of a close mounting match to the 200-4R. Placement of the mount is identical. Only the yoke needs to be changed in most cir***stances.
Early models had PRND321 on the cluster, while later models had PRNDD21, with the left D identified as the overdrive gear by a square or oval ring.
The THM200-4R was phased out after 1990 — its final usage was in the GM B-body lineup (Chevrolet Caprice, Oldsmobile Custom Cruiser station wagon, Cadillac Brougham) coupled to either a Chevrolet 305 or an Oldsmobile 307 engine. It is believed that an HD version of the 200-4R was used in the late 80s Caprice 9C1 police package using the internals from the Buick Grand National.
#3
09-12-2010, 09:31 PM
Depends on the bolt pattern of the bellhousing. Some(not ALL, as the above post suggests) 2004Rs had what we call a "multi-case", meaning there were two different bolt patterns on the casting. This made them able to bolt up to a Chevrolet engine, or a BOP(Buick/Olds/Pontiac) engine, including the Cadillac. If your particular 2004R only has the BOP bellhousing, then you would need an adapter plate for the engine to bolt up, or a 2004R multi-case trans.
btw...There was NEVER a 2004R trans in any Corvette from the factory....never believe everything you read on the web, or Wiki...
btw...There was NEVER a 2004R trans in any Corvette from the factory....never believe everything you read on the web, or Wiki...
#4
09-13-2010, 07:50 AM
That's good advice. Unfortunately, having the 4.1, apparently it uses the GM Metric/Small Corporate/S10 pattern. It will bolt up to the 4.9 L, but that's about it. apparently the pattern is very similar to the Northstar pattern.
Unless there's any way to convert the small corporate pattern to the BOP or the Chevy pattern, it looks like i'll have to get a new transmission as well.
Unless there's any way to convert the small corporate pattern to the BOP or the Chevy pattern, it looks like i'll have to get a new transmission as well.
#5
09-13-2010, 12:07 PM
I've never seen a 2004R with anything other than the normal Chevrolet pattern, or the normal BOP pattern(or both, as with the multi-case). I can't remember ever seeing one with a bolt pattern that is similar to an S-10 Chev, OR even close to the Northstar pattern....but then again, I prolly haven't seen every single trans on the planet, either.
They never used the 2004R in the S-10, or the small engined Camaro/Fireturd, so there was no need to cast a casing for that engine...
They never used the 2004R in the S-10, or the small engined Camaro/Fireturd, so there was no need to cast a casing for that engine...
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