More 200-4R transmission Swap Questions

[KrisW]

See, having an 80 model, I though I got screwed on both sides of the frame; I guess it was just one side!!

Thanks!

 

[jerrycad472]

there were a couple of rare ones around 83-83 that were BOP only and the caddy ones have a unique pattern but other than that they are dual pattern. so if it has more than 4? holes you are good. check the tag too, the BRF is preferred.
for a crossmember, most companies build one for the 200r4 but advertise it for a th400. don't know why but that's the way it works.

Cadillacs used the standard BOP bolt pattern on the 500/472/425 engine family. Did they change it on the later models?

 

[megaladon6]

i believe it was that crappy *ss 4.1l that got the 200r4 and had a different bolt pattern. i can't guarantee that as i got the info from this site in passing.

 

[85 Cutlass Brougham]

The TH 200 4R is a hydraulically shifted transmission and will go into all 4 forward gears so long as it is shifted into 4th with the shifter. Only the lock up clutch is done electronically and it is a generic signal that comes from the ECM that goes to a generic connector that all electric lockup GM transmissions of this era have. I currently do not have mine hooked up and the trans works in all 4 gears, just the converter does not lock up. I also have issues with the transmission making noise from it seems like the front pump, but I do not know if it is related. ( I also don't care as I am planning to rid myself of the automatic and go with a T-5!)

 

[jae]

200-4R's are typically a dual bolt pattern (Chev & BOP). I have read that there are some that were BOP only, but I am not sure how true that is.

It's true, I have a B-O-P only 2004R in my cutlass, It came from an early delta 88 with a 307. 1982, I believe.

His Cutlass is 1986, so it has both sets of holes in the frame. That means if he has a turbo 350 crossmember, he can move it back to the next set of holes. The reason that TH400 and 2004R are listed as the same cross members because they both have the mount in the exact same position as each other. It is exactly the same distance from the center of the transmission mount to the front face of the bellhousing. Tailshafts are different, but that spec is shared. If you have an aftermarket TH400/2004R crossmember, it is made for the front set of holes in the frame only so that it will also fit the early cars with only one set of frame holes.

KW,

As stated, I can't slide the member back since it is an 86, I beleive the cross-members were changed around 83 ~84 (I could probably do that if I still had the '81 Calais). Getting a new cross-member is not a problem. An alternative could be to cut the mounting pad on the member , move it to the rear of the member, then re-weld it. That works in a pinch but most likely won't be going that route; rather have a crossmember that's meant to be for the 200-4R.

Thanks,

JAE

 

[jae]

i didnt have any trouble with tv cable adjustment,,i have a holley carb on mine and bought the holley tv cable bracket,,,if u are still using the quadrajet then just keep the same bracket. Setting the tv cable is easy once you get the 2004r in, theres many posts on here about it.

Thanks. Yes, I was going to get that bracket too, Summit Racing has it listed for the Edelbrock I'm running so it should be ok. Summit and I are best friends :wink: considering the number of parts I ordered from them.

As far as the lockup and the spped limit, that's my problem too. Most of our streets are 35mph until I get past the residental areas, then it's 40 ~ 45, some 50mph. I live in a rural area that's been building up quite a bit over the last couple years, so the speed limit was lowered in my area for the younger kids and the schools. Add in a little traffic and you're at 35 or less any. So my main thing is I wouldn't want to be running in 4th and not have the converter lock-up, that couldn't be good for the transmission.

Thanks,

JAE

 

[jonessmc87]

the only major function of the lock up is to try and improve gas milage and reduce heat in the transmission and especially the t/c. Running around town in 4th gear without being locked up isnt going to generate any more heat than sitting at i stop light in gear. I dont lock it up unless im on the highway for more than a few exits.

 

[ryanwitski]

well the lock up should cycle. if you don't have a controller to lock it up then you will burn it up. I know mine did. Also the T5 is weak. A 305 with a powershift will break it. /go the whole way and get the T56 or TKO. Even the world class T5 is somewhat weak.

 

[KrisW]

i believe it was that crappy *ss 4.1l that got the 200r4 and had a different bolt pattern. i can't guarantee that as i got the info from this site in passing.

The 4.1/4.5 caddy engines in rear wheel drive cars used the BOP transmission pattern and the sometimes BOP only 2004R as well. The front wheel drive cars used the metric bolt pattern that the majority of the front wheel drive cars used in the 80's/90's. Nothing special about either one.

 

[gofast87]

I'm not trying to thread jack here my question is somewhat related. Is there any way to swap the tc lockup control from a car that has the o.d. transmission? I have an entire parts car with the 200-4R transmission, same year, same engine. The transmission is going in a 200 non o.d. car. Is there anything from the parts car I could use to keep the factory-style lockup control? Thanks.