T10 to t56
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On The Tree
Joined: Mar 2020
Posts: 188
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From: NC
T10 to t56 Currently have a 4+3 (Doug nash od on t10) and plan on picking up a t56 within the next month.
will I be able to keep my current flywheel (Sachs 1050), clutch and hydraulic tob (Ram)?
will I be able to keep my current flywheel (Sachs 1050), clutch and hydraulic tob (Ram)?
TECH Fanatic
Joined: Sep 2007
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From: hattiesburg, Ms
Not sure what spline the t10 input shaft is but the t56 is a 26 spline. Unless you can resurface the pressure plate and flywheel and get a new disc then that clutch assembly won’t work. If it is 26 spline then you can get it to work. The slave cylinder needs to have the t56 bolt pattern to work.
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Joined: Sep 2014
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From: Merica
Depends on how you set it up. If you use the factory T10 bell housing and a sandwiched adapter plate bolted to the front of the T56, you can use all of it including your clutch fork and throw out bearing.
Which T56? If you are going with a stock GTO / F-body bellhousing and front case adapter plate, it would be simplest to go with one that fits those apps. The 1050 is, I believe taller at the surface than the flat LS1/LS6 flywheel, and has different clutch bolt pattern.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Thread Starter
On The Tree
Joined: Mar 2020
Posts: 188
Likes: 4
From: NC
Not sure what spline the t10 input shaft is but the t56 is a 26 spline. Unless you can resurface the pressure plate and flywheel and get a new disc then that clutch assembly won’t work. If it is 26 spline then you can get it to work. The slave cylinder needs to have the t56 bolt pattern to work.
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On The Tree
Joined: Mar 2020
Posts: 188
Likes: 4
From: NC
Which T56? If you are going with a stock GTO / F-body bellhousing and front case adapter plate, it would be simplest to go with one that fits those apps. The 1050 is, I believe taller at the surface than the flat LS1/LS6 flywheel, and has different clutch bolt pattern.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Thread Starter
On The Tree
Joined: Mar 2020
Posts: 188
Likes: 4
From: NC
Which T56? If you are going with a stock GTO / F-body bellhousing and front case adapter plate, it would be simplest to go with one that fits those apps. The 1050 is, I believe taller at the surface than the flat LS1/LS6 flywheel, and has different clutch bolt pattern.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Since you have the parts in hand, mock it up and see if a stock type TOB has a proper depth to operate the clutch. If it's too short a TOB, there are shims and taller OEM TOBs. You may get lucky and just need to adapt your clutch line to the TOB and shim it a bit.
Sachs 1050 = short crank LS.
Google what it looks like. To your question, the 621 is deeper, has a different bolt pattern, and is only really used because (with an adapter plate) due to it being a long-produced GM part that fits the LS / 168t flywheel. I don't know your total trans. length w/ the 4+3, but I'd rather run an LS1 bellhousing than a 621 / plate.