2005 ctsv t56 swap

[Quickshift-Perf]

Originally Posted by frankv11

too late to backdown I bought italready , I called a few places. I will have to change the tail housing and mainshaft might as well upgrade to the viper shaft. as far as the shifter I looked at it yesterday, it seems like a pretty straight forward shifter so i'm confident it can work.

thanks for taking the time to look under the goat.

whats the reason for GM to use those driveshafts, maybe they needed to reduce vibration (if it was one piece ), but they are two piece front side being shorter than rear?

I know this is an older thread, but for future reference with people doing searches, here's a bit more detail.

Yes, you can convert the CTS-V T56 to match the GTO version. It's not exactly an inexpensive swap, but you will need to change the following:
-Front plate (GTO / LS Fbody style)
-Mainshaft (GTO shaft)
-Tailhousing (GTO / Fbody style)
-Internal shift rail components (Fbody style)

From the outside measurements, the GTO and Fbody T56's are the same. The stock shifters are different, but that is an easy switch. The main differences are inside. The CTS-V, GTO and Corvette T56's all use the updated and desirable double/triple synchro designs compared to the single/double synchro's of the Fbody's. Also, the CTS-V and GTO's have different gear ratio's for 1st thru 3rd gears as compared to the Fbody units. The CTS-V and GTO's have a lower 1st gear which widens the gear spread a tad but also gives better acceleration down low, especially nice for heavier cars.

On a side note, and the OP might already have found this out, but you can not upgrade the CTS-V to use the Viper mainshaft. Because the Vipers used the older design single/double synchro's, the mainshafts are not compatible with the newer double/triple synchro's of the CTS-V or GTO's. There are other options for an upgraded mainshaft for the double/triple synchro T56's though.....

I hope this clears the mud a little bit.

Mike

[frankv11]

Originally Posted by PhillipM

Hate to break it to you... The T56 in the 2004 CTSV was NOT a TR6060. It was a standard T56. Just don't want you to think you have something you don't.

yeah i know its a t56 version

[frankv11]

Originally Posted by Quickshift-Perf

I know this is an older thread, but for future reference with people doing searches, here's a bit more detail.

Yes, you can convert the CTS-V T56 to match the GTO version. It's not exactly an inexpensive swap, but you will need to change the following:
-Front plate (GTO / LS Fbody style)
-Mainshaft (GTO shaft)
-Tailhousing (GTO / Fbody style)
-Internal shift rail components (Fbody style)

From the outside measurements, the GTO and Fbody T56's are the same. The stock shifters are different, but that is an easy switch. The main differences are inside. The CTS-V, GTO and Corvette T56's all use the updated and desirable double/triple synchro designs compared to the single/double synchro's of the Fbody's. Also, the CTS-V and GTO's have different gear ratio's for 1st thru 3rd gears as compared to the Fbody units. The CTS-V and GTO's have a lower 1st gear which widens the gear spread a tad but also gives better acceleration down low, especially nice for heavier cars.

On a side note, and the OP might already have found this out, but you can not upgrade the CTS-V to use the Viper mainshaft. Because the Vipers used the older design single/double synchro's, the mainshafts are not compatible with the newer double/triple synchro's of the CTS-V or GTO's. There are other options for an upgraded mainshaft for the double/triple synchro T56's though.....

I hope this clears the mud a little bit.

Mike

if this is 85miketpi from ls1tech i spoke to you in regards to swap i'm still on the sidelines as far as moving on with it or selling and buying other.

[Quickshift-Perf]

Originally Posted by frankv11

if this is 85miketpi from ls1tech i spoke to you in regards to swap i'm still on the sidelines as far as moving on with it or selling and buying other.

No, I'm not that person. Just trying to help you and others out in case this topic comes up in the future.

Mike