RB30 transfer case the same as GQ TD42?

[RB30Turbo]

Does anyone know if the TD42 transfer case is the same as an rb30 transfer case?

I've searched but can't find a firm answer.

Thanks.

[PeeBee]

I believe the transfer cases are the same, just different bellhousings to suit the two size gearboxes, being the RD28/RB30 and the TD/TB gearboxes. My RD28 was simply swapped over behind a TD42 box for my engine conversion, using the TD bellhousing.

[tuckertrucker]

if it helps the serial number fir the TD42 transfer case is TX12A, and the auto used behind the TD42 is RE4R03A. (noted from a '92 GQ Safari/ Patrol)

[dom14]

It's the same in GQs afaik. The lubrication oil can be different, depending on the year.

[RB30Turbo]

Thanks for the replys.

I've since been told by my mechanic that the TD42 transfer case I have won't bolt up as a replacement to the RB30 transfer case.

Is there anyone that has tried this that can confirm for sure either way?

[dom14]

Thanks for the replys.

I've since been told by my mechanic that the TD42 transfer case I have won't bolt up as a replacement to the RB30 transfer case.

Is there anyone that has tried this that can confirm for sure either way?

TD42 and TB42 transfer case should be the same.
I was told the transfer case(externally) the same in GQs.
I know there's a difference between earlier(up to 1990 I think) and later transfer cases, in terms of what type
of oil to use.
Assuming the mechanic is right about that, then RB30 transfer case is different from TB42/TD42.
Not sure whether there's a difference between manual gearbox transfer case & auto gearbox transfer case.