T-56 transmission lengths, LSx, F-body & GTO.

[BRAAP]

Regarding LSx T-56 trans, I have read where the GTO T-56 shifter is further rearward than the F-body T-56.

 

Question is, what is the exact dimension from the bellhousing/engine block mating surface, to the shifter centerline with the shift lever in nuetral. Measurement taken to be square to the bellhousing mating surface, along the plane of input/output shaft.

 

Also, what options are available commercially to offset the shifter even further rearward, i.e. dog leg shifter, modified shifter rail, etc?

[m1noel]

Paul,

http://www.ddperformance.com/t56dia.jpg

Mine (from 05 GTO) is 29 3/4 inches with the GTO linkage removed. The GTO linkage adds 3 3/8 inches. The B&M kit includes an optional set-back bar of 2 1/2 inches (which I am using). The biggest reason not to use the GTO linkage is that it is encased in a plastic housing which will not let the trans sit high enough in the tunnel.

Hope this helps,

Mike

[BRAAP]

Mike,

Thank you for the info and link.

 

This is for a Z-32 that I really REALLY want to install a 6L LQ4 in without cutting into the firewall! Short version is I need in the neighborhood of 31”-36” from the bell-housing/block mating surface to shifter C/L, depending on which oil pan I go with. Not sure if I can modify a rear sump pan enough to work or have to move the engine even further forward and use the GTO front sump pan. I have a complete 5.3 LM7 engine with the truck pan, a 2000 Vette LS1 short block with the bat wing pan in the shop, and in transit right now, a scrap F-body pan to cut up and hopefully make fit.

At any rate, that is my ball park figure after mocking up a Gen I SBC and the 5.3 in my Z-32 parts car.

 

More details with mock up pics here;

http://forums.hybridz.org/showthread.php?t=142025

 

Any ideas/suggestions would be greatly appreciated.

[BRAAP]

So are the trans cases between the F-body and the GTO the same physically, difference being the removable shift lever?

After reading a bit more, it appears the difference is in the shift lever only.

[m1noel]

I haven't seen an F-body trans, but I don't think they have the "bucket" for the second ball and socket that the GTO shift linkage uses. I'll try to post a pic or two tomorrow

Mike

[palosfv3]

So are the trans cases between the F-body and the GTO the same physically, difference being the removable shift lever?

After reading a bit more, it appears the difference is in the shift lever only.

 

The shifter relay block is slightly different. This is the block that the shifter arm ball fits into and attaches to the main gear shift rod.

GM #12523298

[towbar]

Hi Larry

You said that the shifter relay block on a GTO T56 is slightly different to a Camaro T56. I have a GTO/Holden T56. Can you tell me if a Camaro shifter assy will fit onto my GTO gearbox (or a Ford one for that matter) ??

 

Thanks

Jeremy

[palosfv3]

Hi Larry

You said that the shifter relay block on a GTO T56 is slightly different to a Camaro T56. I have a GTO/Holden T56. Can you tell me if a Camaro shifter assy will fit onto my GTO gearbox (or a Ford one for that matter) ??

 

Thanks

Jeremy

 

 

If your going to use a Camaro shifter on a GTO T56 you will need the GM

#12523298 block. We would experience a partial engagement of first gear with the Camaro shifter using the GTO block.