Is there a difference in the cases of a 2004r lock up and nonlock up?

[myname7890]

Hey, My trans case is srored from the band piston failure. I need a new case. Is there a difference in the case from lock up and non lock up? Are they both still called 2004r. Thanks, Steve

 

[chris718]

All 2004r transmissions were lock up from the factory and even when they are converted to non lock up the case is not modified.You arent talking about a 200 3 speed are you?If so there is a lock up and non lock up unit.The non lockers had a vent on the extension housing area.

 

[myname7890]

Some one today said they had a bop 2004r but then said it was a three speed. So I was not sure if I should buy it .

 

[chris718]

There is a bop only 2004r case and a chevy bop comdo case.Either way if your engine is bop itll fit.

 

[myname7890]

Thanks chris. Do you know what the difference is in a brf case. If my internals are from a non brf can they be used in a brf???

 

["Turbo-T"]

There is a bop only 2004r case and a chevy bop comdo case.Either way if your engine is bop itll fit.

Hhhmm thought all 200-4R's were Chevy/Buick/Olds/Pontiac? No? What about the BRF 200-4R trannies our TR's came with? Do they have a Chevy bolt pattern also?

 

[SSedan64]

BOP/Buick/Olds/Pontiac Housing & Unibell/Chevy/BOP Housing>

 

["Turbo-T"]

So the unibell housing has the notch at the top of it?

 

[SSedan64]

Pic on left is BOP housing/case with 6 mounting holes & 2 dowel holes.
Pic on right is Unibell BOP & Chevy housing/case with 10 mounting bolt holes & 2 dowel holes.

 

["Turbo-T"]

Thanks. Were there any cars besides a Monte/Malibu/Elky that came with the multi bell 200-4R?

 

[SSedan64]

Most all 2004R's I've seen have the Uni-Bell case. Some early 80's had BOP only. Saw a Pic a while back of an early 80's Chevy only case but can't find it now.

 

["Turbo-T"]

Ok, just wondering if my BRF tranny has it or not....haven't checked, just figured they were all unibell up until now.