From Th200 transmission to Th2004r

[hungrietaz]

I got a question I need to know before I spend money for nothing. My 85 Regal has a 3.8 with a 3 speed transmission th200.I want to put in a 200r4 in it but I was told the driveshaft needs to be shortned or find one from a Monte carlo SS because they have the right lenght shaft.What is the size diffrence in the two??? I'm also changing the rear end to 3:42 ratio.Does anyone know?

 

[RegalBegal]

Both transmissions are the same length, so the drive shaft shouldn't need to be cut. You will need a different cross member as their mounts are in different locations.

 

[chevyss415]

Im working on this swap on my 81 regal i did need a new cross member and mount. i used the same linkage system... i have a colom shift. i had to do a few bending here and there, but go it working. do you have a colom or floor shift??

 

[hungrietaz]

Im working on this swap on my 81 regal i did need a new cross member and mount. i used the same linkage system... i have a colom shift. i had to do a few bending here and there, but go it working. do you have a colom or floor shift??

I got a floor shifter did you use the same shaft?

 

[chevyss415]

Im working on this swap on my 81 regal i did used a new cross member and mount. i used the same linkage system... i have a colom shift. i had to do a few bending here and there, but go it working. do you have a colom or floor shift??

 

[Longroof79]

You should be good using the same driveshaft. However, If you're installing an 8.5 rear out of a GN, T-Type, H/O, 442 you will need to shorten the driveshaft about an inch.

 

[chevyss415]

yea i was able to use it but it was like 1-2" short like the guy longroof79 said

 

[chevyss415]

how did the lock up converter connecter go for you?? did you use the sameone?